WO1996025020A1 - Dispositif emetteur de lumiere en plusieurs couleurs et procede de production de ce dispositif - Google Patents
Dispositif emetteur de lumiere en plusieurs couleurs et procede de production de ce dispositif Download PDFInfo
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- WO1996025020A1 WO1996025020A1 PCT/JP1996/000233 JP9600233W WO9625020A1 WO 1996025020 A1 WO1996025020 A1 WO 1996025020A1 JP 9600233 W JP9600233 W JP 9600233W WO 9625020 A1 WO9625020 A1 WO 9625020A1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
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Definitions
- the present invention relates to a multi-color light emitting device and a method for manufacturing the same.
- the present invention relates to a multicolor light emitting device and a method for manufacturing the same. More specifically, the present invention relates to a multicolor light emitting device suitably used for a multi-color or full-color thin display of various light emitting types and a method of manufacturing the same.
- Electroluminescent elements (hereinafter referred to as EL elements) have the characteristics of high visibility due to self-emission, and excellent impact resistance because they are completely solid.
- EL elements Electroluminescent elements
- inorganic and organic compounds are used in the light-emitting layer.
- Various EL elements used have been proposed and put into practical use.
- One of the practical applications is a multicolor light-emitting device using an EL element.
- the multicolor light-emitting device is a device in which three primary color (red, green, and blue) color filters are installed on a white light-emitting inorganic EL device, and the three primary color inorganic EL devices are sequentially patterned to form a three-color EL device.
- three primary color (red, green, and blue) color filters are installed on a white light-emitting inorganic EL device, and the three primary color inorganic EL devices are sequentially patterned to form a three-color EL device.
- There is one that emits light separately (Semicond. Sci. Technol. 6 (1991) 305-323).
- the luminous efficiency of one of the three primary colors is limited to one third (33%) of that of white at most.
- an element that can efficiently emit white light has not yet been obtained.
- organic EL ⁇ 2 is known to be promising as a high-brightness, high-efficiency light-emitting device.
- the light-emitting layer is made of an organic material, there is a high possibility that various emission colors can be obtained by molecular design of the organic material, and application to a multicolor light-emitting device is expected as one of the practical applications of organic EL elements. ing.
- organic EL devices suffer from deterioration such as a decrease in luminance accompanying the generation of black spots due to chemical factors such as water vapor, oxygen, and organic gas from the outside. Since it is a laminate, there was a problem of comparative destruction due to heat or physical (mechanical) factors such as street hits.
- the method of separating and arranging each organic EL element that emits light of the three primary colors (RGB) in a two-dimensional manner in order to achieve multicoloring is either a wet or a photolithographic method. It was difficult in a process with heat treatment.
- an EL light emitting layer 1b sandwiched between a lower electrode 1c and a light transmitting upper electrode la is provided on a substrate 2 as shown in FIG.
- the EL light extracted through la is extracted to the outside of the light-transmitting substrate 8 through a color filter 9 provided on the light-transmitting substrate 8 so as to face the light-transmitting electrode 1a.
- a color EL display device characterized by the following is disclosed (JP-A-64-48888).
- the brightness of one luminescent color is reduced to at most one third by the color filter in this device.
- the emission life of the EL element is shortened by gas such as water vapor, oxygen or organic monomer, and low molecular components generated from the color filter. I could not avoid it.
- the portion corresponding to the light emitting portion of the organic EL element absorbs the light emitted from the organic EL element and emits the fluorescent light of visible light.
- a technique for disposing a phosphor layer that emits light is disclosed (Japanese Patent Application Laid-Open No. 3-152879). According to this technique, for example, blue or blue-green light emitted from an organic EL element can be converted into fluorescent light with longer wavelength visible light.
- a multi-color (three primary colors) light-emitting device in which phosphor layers capable of converting into green or red light are arranged in a plane is disclosed (Japanese Patent Application Laid-Open No. 5-258880). .
- the advantage of providing a phosphor layer is that high-efficiency multicolor emission can be expected as compared with the case where a color filter is provided. That is, assuming that the blue phosphor emitted from the organic EL element, particularly the conversion efficiency of the phosphor into green, has an absorption efficiency of at least 80% or more for the next absorbed light. Various fluorescent materials that emit fluorescence at an efficiency of 80% or more are known. Therefore, assuming an absorption efficiency of 80% and a fluorescence efficiency of 80%, it is a calculation that 64% of the blue emission of the organic EL device can be converted into visible light of a long wavelength.
- a multicolor light emitting device can be obtained by using the organic EL element and the phosphor layer.
- Japanese Patent Application Laid-Open No. 5-258880 the configuration of the multicolor light emitting device is described. It proposes as follows.
- phosphors 3 R and 3 G that absorb the light emitted from the organic EL element 1 and emit green and red fluorescence, respectively, are arranged on a transparent substrate 11 in a plane, A transparent substrate 11 containing the phosphors 3 R and 3 G is polymerized with an organic monomer or polymer, and a transparent or electrically insulating hard planarization layer (protective layer) 7 is formed by spin-casting or sol-gel glass technique.
- the transparent electrode 1 a of the organic EL element 1 is arranged on the planarization layer 7.
- the preparation of the planarized layer by the sol-gel glass technique usually requires a high-temperature treatment of 400 ° C. or more, which degrades the organic phosphor. Therefore, if the sol-gel glass planarization layer is prepared by heat treatment (up to about 250 ° C) that does not deteriorate the phosphor, water or organic matter remains. There was a problem of significantly lowering
- the loss of luminous efficiency due to the color filter is easily expected as described above, and in addition, the inorganic EL element and the color filter are manufactured independently. If, for example, the thickness of the inorganic EL element substrate was not increased (approximately 700 / m or more), warpage and distortion of the substrate occurred, and the EL element could not be manufactured stably. In addition, as a result of increasing the thickness of the substrate, the gear between the color filter and the EL element expands, and when multi-color light emission is performed, the emission color other than the desired emission color leaks out, and the viewing angle is significantly reduced. Was.
- the present invention has been made in view of the above-described problems, and provides a multicolor light-emitting device using an organic EL element having excellent light-emitting life and excellent viewing angle characteristics.
- Stable equipment DISCLOSURE OF THE INVENTION An object of the present invention is to provide ⁇ ⁇ ⁇ ⁇ which can be manufactured efficiently.
- a support substrate an organic electroluminescent (EL) element disposed on the support substrate, and a device that absorbs light emitted from the organic EL element.
- a multicolor light emitting device including a transparent electrode of the organic EL element or a phosphor layer arranged corresponding to the electrode so as to emit different visible light fluorescence, the organic EL element and the phosphor layer A transparent inorganic oxide substrate on which a phosphor layer is disposed while maintaining a gap with the organic EL element is disposed therebetween, and the organic EL element is sealed between the transparent inorganic oxide substrate and the supporting substrate.
- a multicolor light emitting device characterized by being sealed by a stopping means is provided.
- a multicolor light-emitting device wherein the phosphor layer is separately arranged in a plane on the transparent inorganic oxide substrate.
- a multicolor light emitting device characterized by further providing a phosphor protective layer and / or a transparent substrate on the phosphor layer.
- a multicolor light-emitting device wherein the transparent inorganic oxide substrate has a thickness of 1 to 200 m.
- a multicolor light-emitting device wherein the inorganic oxide substrate is a transparent glass plate.
- a transparent support substrate a phosphor layer separated and arranged on the transparent support substrate in a planar manner, and an organic element provided on or above the phosphor layer And a transparent electrode of the organic EL element such that each of the fluorescent layers absorbs light emitted from the organic EL element and emits different visible light fluorescence.
- a transparent insulating inorganic oxide layer having a thickness of 0.01 to 200 / m is provided between the phosphor layer and the organic EL element.
- a light emitting device is provided.
- a transparent phosphor protecting layer and a transparent bonding layer or a transparent bonding layer are provided between the phosphor layer and the transparent insulating inorganic oxide layer.
- the multicolor light emitting device characterized by the above is provided.
- a multicolor light emitting device wherein the transparent insulating inorganic oxide is a transparent insulating glass plate.
- the transparent insulating inorganic oxide is at least one compound selected from the group consisting of silicon oxide, aluminum oxide, and titanium oxide.
- a multicolor light emitting device is provided.
- the transparent insulating inorganic oxide comprises one or more compounds selected from the group consisting of silicon oxide, aluminum oxide, and titanium oxide.
- a multicolor light emitting device characterized in that a film is formed on at least one of an upper surface and a lower surface of a glass plate.
- a phosphor layer that absorbs light emitted from the organic EL element and emits different visible light fluorescence is disposed and separated on a transparent support substrate in a planar manner.
- the first to third inventions of the present application it is possible to provide a multicolor device using an organic EL element having excellent light emission lifetime and excellent viewing angle characteristics. Further, it is possible to provide a method for stably and efficiently manufacturing the multicolor light emitting device.
- FIG. 1 is a schematic cross-sectional view schematically showing one embodiment of the multicolor light emitting device (first invention) of the present invention.
- FIG. 2 is a schematic cross-sectional view schematically showing another embodiment of the multicolor light emitting device (first invention) of the present invention using a phosphor protective layer.
- FIG. 3 is a schematic sectional view schematically showing an example using a transparent substrate of the multicolor light emitting device of the present invention (first invention).
- FIG. 4 is a schematic cross-sectional view schematically showing another embodiment of the multicolor light-emitting device of the present invention (first invention) using phosphor layers which are separately arranged.
- FIG. 5 is a schematic sectional view schematically showing an example using a color filter and a black matrix of the multicolor light emitting device (first invention) of the present invention.
- FIG. 6 is a schematic cross-sectional view schematically showing another embodiment of the multicolor light-emitting device of the present invention (first invention) using a phosphor protective layer and a transparent substrate.
- FIG. 7 is a schematic cross-sectional view schematically showing a comparative example of the first invention in which a phosphor layer is provided on the same side of a transparent glass substrate as an organic EL element.
- FIG. 8 is because O 0 an example of a conventional multi-color light emitting device in a schematic cross-sectional view schematically showing
- FIG. 9 is a schematic cross-sectional view schematically showing one embodiment of the multicolor light emitting device (second invention) of the present invention.
- FIG. 10 is a schematic cross-sectional view schematically showing another embodiment of the multicolor light emitting device (second invention) of the present invention using a transparent adhesive layer.
- FIG. 11 is a schematic cross-sectional view schematically showing another embodiment of the multicolor light-emitting device (second invention) of the present invention using a transparent adhesive layer and a transparent phosphor protective layer.
- FIG. 12 is a schematic cross-sectional view schematically showing another embodiment of the multicolor light-emitting device (second invention) of the present invention using a transparent phosphor protective layer.
- FIG. 13 schematically shows another embodiment of the multicolor light emitting device (second invention) of the present invention using a transparent adhesive layer, a transparent phosphor protective layer, a color filter and a black matrix. It is an outline sectional view.
- FIG. 14 schematically shows another embodiment of the multicolor light-emitting device of the present invention (second invention) using two transparent adhesive layers, a transparent phosphor protective layer, and a transparent insulating inorganic oxide layer.
- FIG. 15 is a schematic cross-sectional view schematically showing an example of a conventional multicolor light emitting device.
- the emission (particularly, blue or blue-green) of the organic EL element is not attenuated and scattered, is efficiently absorbed by the phosphor layer, and emits the fluorescent light of the emitted visible light.
- the emission (particularly, blue or blue-green) of the organic EL element is not attenuated and scattered, is efficiently absorbed by the phosphor layer, and emits the fluorescent light of the emitted visible light.
- the first invention of the present application can specifically include the following structures (1) to (3).
- This configuration (1)-(3) Are shown in Fig. 1 to Fig. 3, respectively.
- the conversion of the emission color of the organic EL element by the phosphor may be any emission color having a wavelength longer than the emission wavelength of the organic EL element.
- Support substrate 2 / organic EL element 1 (electrode 1 c Z organic material layer 1 b transparent electrode 1 a) Z gap 6 transparent inorganic oxide substrate 4 phosphor layer 3
- Support substrate 2 Z organic EL element 1 (electrode 1 c Z organic material layer 1 b Z transparent electrode 1 a gap 6 Z transparent inorganic oxide substrate 4 Z phosphor layer 3 Z transparent substrate 8)
- the organic EL element 1 is sealed by a sealing means 5 in which the transparent inorganic oxide substrate 4 and the support substrate 2 are joined by, for example, an adhesive.
- the phosphor layers 3 that emit different fluorescent light are separated from each other in a plane so that the three primary colors of RGB can be arranged. Light emission can be obtained.
- the thickness of the transparent inorganic oxide substrate 4 is preferably 1 m or more and 200 ⁇ m or less.
- a color filter 9a may be arranged on each phosphor layer 3 to adjust the color of the fluorescent color to increase the color purity, or each phosphor layer or color filter may be arranged.
- a black matrix 9b may be arranged between the filters to prevent leakage light and enhance visibility of multicolor light emission.
- the multicolor light emitting device of the first invention of the present application will be specifically described for each component. It should be noted that the materials used for the constituent elements are described as the minimum necessary ones, and are not limited thereto.
- the organic EL device used in the present invention emits light from near-ultraviolet light to blue-green.
- the following structures can be mentioned.
- the structure is such that a light-emitting layer of an organic layer is sandwiched between two electrodes (a transparent anode (anode) and an electrode (cathode)), and another layer may be interposed as necessary.
- a transparent anode anode
- an electrode cathode
- metals, alloys, electrically conductive compounds or mixtures thereof having a high work function (4 eV or more) are preferably used.
- ⁇ Specific examples include metals such as Au, Conductive transparent materials such as Cul, ITO, S ⁇ 02, ⁇ ⁇ 0 and the like.
- a pattern electrode of a transparent electrode (anode) is used. An electrode pattern line perpendicular to the electrodes is formed.
- a transparent electrode is formed on an organic layer such as a light-emitting layer, nit etching is performed, and the organic layer is greatly deteriorated by photolithography, which is not stable. Accordingly, a pattern of a transparent electrode (anode) is formed through a mask having a desired shape at the time of vapor deposition and sputtering of the above material.
- the pattern of the transparent electrode can be formed by photolithography.
- the transmittance of the anode with respect to the emitted light be greater than 10%.
- the sheet resistance of the anode is preferably several hundred ⁇ 3 or less.
- the thickness of the anode depends on the material, usually from lO nm to; L / zm, preferably from 10 to 200 nm. Selected by range
- the light-emitting material of the organic EL device is mainly an organic compound, and specific examples thereof include the following compounds depending on a desired color tone.
- a compound represented by the following general formula can be used to obtain purple light emission from the near ultraviolet region.
- n 2, 3, 4 or 5.
- Y represents the following compound
- a phenyl group, a fuynylene group, a naphthyl group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group, a hydroxyl group, a sulfonyl group, a carbonyl group, an amino group, a dimethylamino group or a diphenylamino group are exemplified. It may be a single or plural substitution. Also, these are To form a saturated 5- or 6-membered ring.
- those bonded to phenyl, phenylene, and naphthyl groups in a loose position are preferred for forming a smooth vapor-deposited film with good bonding properties.
- the following compounds are used.
- p-quaterphenyl derivatives and p-quinfunyl derivatives are preferred.
- Benzoxazoles such as 2- [2- (4-chlorophenyl) vinyl] naphtho [1,2-d] oxazole,
- chelated oxinoxide compound for example, those disclosed in JP-A-63-295695 can be used. Typical examples thereof include:
- styrylbenzene-based compound for example, those disclosed in European Patent No. 0 319 881 and European Patent No. 03 735 882 can be used. Typical examples are 1,4-bis (2-methylstyrene) benzene,
- a distyryl virazine derivative disclosed in Japanese Patent Application Laid-Open No. 2-252793 can also be used as a material for the light emitting layer.
- a typical example is
- a polyfuunyl-based compound disclosed in European Patent No. 0 387 715 may be used as a material for the light emitting layer.
- Oxadiazole derivatives Japanese Patent Application Laid-Open No. 2-216719, or Oxadiazole derivatives disclosed by Hamada et al. At the 38th Lecture Meeting on Applied Physics), aldazine derivatives (Japanese Patent Application Laid-Open No. — 2 2 0 3 9 3 publication), Virazirin derivatives (Japanese Patent Application Laid-Open No. 2-220394),
- High molecular compounds such as those described in International Publication No. WO09 / 13148 and Appl. Phys. Lett ,, ⁇ 58, 18, 1982 (1991), may also be used as a material for the light emitting layer. Can be used.
- an aromatic dimethylidin compound (Europe Patent No. 0 388 687, disclosed in Japanese Patent Application Laid-Open No. 3-231970) ) Is preferred.
- an aromatic dimethylidin compound European Patent No. 0 388 687, disclosed in Japanese Patent Application Laid-Open No. 3-231970
- DTBPVBi 4,4'-bis (2,2-di-t-butylphenylvinyl) biphenyl
- Examples include 4,4 * -bis (2,2-divinylvinyl) biphenyl (hereinafter abbreviated as DPPVBi), and derivatives thereof.
- L is a hydrocarbon having 6 to 24 carbon atoms including a benzene ring.
- 0—L is a fehnate ligand
- Q is a substituted 8-quinolinolate ligand
- R s is an aluminum atom-substituted 8-quinolinolate ligand. Represents an 8-quinolinolato ring substituent selected to sterically hinder the binding of more than two ligands
- the host is used as the luminescent material described above, and the dopant is used as a strong fluorescent dye from blue to green, for example, a coumarin-based or the host described above. Fluorescent dyes similar to those can be mentioned.
- a luminescent material of an aromatic dimethylidene compound as a host particularly preferably, for example, DPVB i
- a dopant for example, diphenylamino-minostyryl arylene, particularly preferably, for example, 1,4-bis ⁇ 4-N, N-diphenylamino) styrene (DPAVB).
- a known method such as a vapor deposition method, a spin coating method, and an LB method can be applied.
- the light emitting layer is particularly preferably a molecular deposition film.
- a molecule deposited film is a thin film formed by deposition from a material compound in a gas phase or a film formed by solidification from a material compound in a solution state or a liquid phase.
- the deposited film can be distinguished from the thin film (molecule accumulation film) formed by the LB method by the difference in the cohesive structure, the higher-order structure, and the functional difference resulting from it.
- the light emitting layer can also be formed by dissolving a binder such as a resin and a material compound in a solvent to form a solution, and then forming a solution by a thin coating method or the like.
- the thickness of the light-emitting layer formed in this way is not particularly limited and can be appropriately selected depending on the situation. Usually, the range of 5 nm to 5 m is preferable.
- the light emitting layer of the organic EL device has the following functions. That is, 1 injection function; a function that can inject holes from the anode or the hole injection layer and an electron can be injected from the cathode or the electron injection layer when an electric field is applied; There is a function to move the injected charges (electrons and holes) by the force of electrolysis, and (3) a luminescence function; a function to provide a field for recombination of electrons and holes and to link it to luminescence.
- 1 injection function a function that can inject holes from the anode or the hole injection layer and an electron can be injected from the cathode or the electron injection layer when an electric field is applied
- 1 injection function a function that can inject holes from the anode or
- Materials for the hole injection layer provided as needed include those conventionally used as hole injection materials for photoconductive materials and those used for hole injection layers in organic EL devices. Any of these can be selected and used.
- the material of the hole injection layer has either hole injection or electron barrier properties, and may be either an organic substance or an inorganic substance.
- Imidazole derivative see Japanese Patent Publication No. 37-166,96
- Polyarylalkane derivatives U.S. Pat. Nos. 3,615,402, 3,820,989, 3,542,544, and Japanese Patent Publication No. 45-544
- No. 555, No. 51-10983 Japanese Unexamined Patent Publication No. 51-93224, No. 55-171, No. 55-414, No. 56-414, No. 55—1 0 86 67, No. 55—15
- Arylamine derivatives (U.S. Pat. Nos. 3,567,450, 3,180,703, 3,240,597, and 3,840,597). 3, 6, 5 8, 520, 4, 732, 103, 4, 175, 961, 4, 0 12, Japanese Patent Publication No. 37-76, JP-B-49-357072, JP-A-39-275757, JP-A-55-144250, JP-A-56-119 1332, 56-22437, West German Patent No. 1, 110, 518, etc.),
- Fluorenone derivatives see Japanese Patent Application Laid-Open No. 54-110837
- Hydrazone derivatives U.S. Pat. No. 3,717,462, JP-A-54-59143, JP-A-55-52063, JP-A-55-52063
- JP 62-47676 JP 62-36 66 74 JP 62-10652, JP 62 302 55, JP 60 —
- the conductive polymer oligomer (particularly, thiophene oligomer) disclosed in Japanese Patent Application Laid-Open No. 1-211399 can be mentioned.
- the above-mentioned materials can be used.
- Porphyrin compounds (those disclosed in JP-A-63-29556965, etc.) and aromatic tertiary amines Mine compounds and styrylamine compounds (U.S. Pat. Nos. 4,127,412, JP-A-53-27033, JP-A-54-58455, 5 4 1 4 96 34 Publication, 5 4 6 4 29 9 Publication, 55 5 7 9 4 50 Publication, 5 5-1 4 4 250 Publication, 56 1 1 No. 9 1332, No. 61-29555 588, No. 61-98353, No. 63-29595695), especially aromatic third It is preferable to use a class amine compound.
- vorphyrin compound examples include:
- Titanium phthalocyanine oxide Titanium phthalocyanine oxide
- aromatic tertiary amine compound and the styrylamine compound include:
- TPD 4,4'-diamin
- U.S. Pat. No. 5,061,569 has two condensed aromatic rings in the molecule, for example, 4,4'-bis [N- (1-naphthyl) -N- [Phenylamino] biphenyl (hereinafter abbreviated as NPD), and three triphenylamine units described in JP-A-4-308688 are connected in a starburst type. 4, 4 *, 4 '' — tris [N— (3-methylphenyl) -N-phenylamino] triphenylamine (hereinafter abbreviated as MT DATA).
- NPD 4,4'-bis [N- (1-naphthyl) -N- [Phenylamino] biphenyl
- MT DATA triphenylamine
- inorganic compounds such as p-type Si and p-type SiC can also be used as the material for the hole injection layer. it can.
- the hole injection layer is formed by thinning the above-mentioned compound by a known method such as a vacuum evaporation method, a spin coating method, a casting method, and an LB method. Can be formed.
- the thickness of the hole injection layer is not particularly limited, but is usually 5 nm to 5 m.
- the hole injection layer may have a single-layer structure composed of one or more of the above-described materials, or may have a multilayer structure composed of a plurality of layers having the same composition or different compositions.
- the electron injection layer provided as necessary may have a function of transmitting electrons injected from the cathode to the light-emitting layer, and may be made of any of conventionally known compounds.
- Specific examples of c that can be selected and used include disubstituted fluorene derivatives, JP-A-57-149259, JP-A-58-55450, JP-A-63-1.
- Anthraquino dimethane and anthrone derivatives disclosed in Japanese Unexamined Patent Publication Nos. Sho 61-225151 and 61-233750, Appl. Phys. Lett .. 55, 15. 1489 and the above-mentioned 38th Applied Physics Federation, Hamada et al. Disclose an oxazine diazole derivative disclosed in JP-A-59-194393.
- the method disclosed in Japanese Patent Application Laid-Open No. 59-194393 discloses the electron-transporting compound as a material for a light-emitting layer. It has been clarified that it can be used even if it is used.
- Metal complexes in which the center metal of these metal complexes replaces In, Mg, Cu, Ca, Sn, Ga, or Pb can also be used as a material for the electron injection layer. .
- metal free or metal phthalocyanine or those whose terminal is substituted with an alkyl group, a sulfonic acid group, or the like is also preferable.
- the distyryl virazine derivative exemplified as the material of the light emitting layer can also be used as the electron injection material.
- an inorganic semiconductor such as n-type single Si or n-type SiC can also be used.
- the electron injection layer can be formed by thinning the above-mentioned compound by a known method, for example, a vacuum deposition method, a Sincoat method, a cast method, or an LB method.
- the thickness of the electron injection layer is not particularly limited, but is usually 5 nm to 5 m.
- the electron injection layer may have a single-layer structure composed of one or more of the above-mentioned materials, or may have a multilayer structure composed of a plurality of layers having the same composition or different compositions.
- a metal having a small work function (4 eV or less) (this is called an electron injectable metal), an alloy electrically conductive compound, and a mixture thereof are used.
- An example of such an electrode material is sodium, a sodium-carbon alloy, magnesium, lithium, and a magnesium-Z copper mixture.
- a mixture of an electron injecting metal and a second metal which is a metal having a large work function and a stable work function.
- the cathode can be manufactured by forming a thin film of these electrode substances by a method such as vapor deposition or sputtering.
- a cathode pattern line perpendicular to the anode pattern line is usually formed.
- a cathode is formed on a thin film of an organic compound such as a light-emitting layer
- the photolithography method of performing etch-etching causes severe deterioration of the organic compound and is not stable. Therefore, a cathode pattern is formed through a mask having a desired shape during the vapor deposition of the above material.
- a cathode pattern can be formed by photolithography.
- the sheet resistance as the negative electrode is preferably several hundreds or less, and the film thickness is usually selected from the range of 10 nm to: L m, preferably from 50 to 200 nm.
- L m preferably from 50 to 200 nm.
- organic EL device (example) By forming a light emitting layer, a separator (transparent electrode), a hole injection layer as needed, and an electron injection layer as needed, and a cathode (electrode) by the materials and methods exemplified above, An organic EL device can be manufactured. In addition, an organic EL device can be manufactured in the reverse order from the cathode to the anode.
- the following describes an example of manufacturing an organic EL device having a configuration in which an anode, a hole injection layer, a light emitting layer, an electron injection layer, and a cathode are sequentially provided on a substrate.
- a thin film made of an anode material is formed on an appropriate substrate by a method such as vapor deposition sputtering so as to have a thickness of 1 ⁇ or less, preferably in the range of 10 to 200 nm.
- Anode is produced.
- a hole injection layer is provided on the positive electrode.
- the hole injection layer can be formed by a vacuum deposition method, a spin coating method, a casting method, an LB method, or the like.
- a uniform film is easily obtained and binholes are generated. From the viewpoint of difficulty, it is preferable to form by a vacuum evaporation method.
- the deposition conditions vary depending on the compound to be used (the material of the hole injection layer), the crystal structure and the recombination structure of the target hole injection layer, but generally, Deposition source temperature 50 to 450 ° C, degree of vacuum 10-? To 10-3 t 0 rr, deposition rate 0.01 to 50 nmZ sec, substrate temperature 150 to 300 ° C, film It is preferable to select an appropriate thickness in the range of 5 nm to 5 m.
- a light emitting layer in which a light emitting layer is provided on the hole injection layer is formed by using a desired organic light emitting material by a method such as a vacuum evaporation method, a sputtering method, a spin coating method, or a casting method.
- a method such as a vacuum evaporation method, a sputtering method, a spin coating method, or a casting method.
- it can be formed by thinning the material, it is preferable to form the film by a vacuum evaporation method because a uniform film is easily obtained and a binhole is not easily formed.
- the evaporation conditions vary depending on the compound used, but can be generally selected from the same condition range as the hole injection layer.
- an electron injection layer is provided on the light emitting layer.
- Hole injection layer, light emitting layer Similarly to the above, it is preferable to form the film by a vacuum evaporation method because a uniform film needs to be obtained.
- the deposition conditions can be selected from the same condition range as the hole injection layer and the light emitting layer.
- an organic EL device can be obtained by laminating cathodes.
- the cathode is made of metal, and can be formed by vapor deposition or sputtering. However, to protect the underlying organic layer from damage during film formation, vacuum evaporation is preferred.
- the fabrication from the anode to the cathode be performed consistently by a single evacuation.
- the support substrate used in the present invention a material that is not composed of an organic substance is preferable, and transparency does not matter. Rather, since light is extracted from the phosphor layer side, a light-shielded one is more preferable. However, it is more preferable that at least the surface of the organic EL element side is an insulator in order to obtain electrical insulation of the electrode pattern to be further laminated.
- the thickness of the thin transparent glass plate to be laminated later is not particularly limited as long as it is a supporting substrate that does not cause warpage, distortion, or deformation and can be reinforced.
- a ceramic plate, a metal plate, or the like which is insulated with an inorganic oxide such as silica or alumina, or the like can be used.
- transparent materials such as low-expansion glass
- the phosphor layer used in the present invention is, for example, a solid state layer made of a fluorescent dye and a resin, or a fluorescent dye alone, in which the fluorescent dye is dissolved or dispersed in a binder resin. Can be.
- 1,4-bis (2-methylstyryl) benzene is a fluorescent dye that converts light emitted from a violet light-emitting element into blue light from near-ultraviolet light.
- Bis-MSB is a fluorescent dye that converts light emitted from a violet light-emitting element into blue light from near-ultraviolet light.
- iso-stilbene dyes such as trans-1,4'-diphenylstilbene (hereinafter, DPS) and coumarin-based dyes such as 7-hydroxy-4-methylcoumarin (hereinafter, coumarin 4).
- a fluorescent dye that converts the emission of a blue or blue-green light-emitting element into green emission for example, 2,3,5,6-1H, 4H-tetrahydro-8-trifluorene Tirquino lizino (9,9a, 1 gh) coumarin (hereinafter coumarin 1553), 3— (2, 1 benzothia zolyl) 17—Jetilaminoc marin (hereinafter coumarin 6), 3 — (2'-Benzimidazolyl) 1 7—N, N—Cumarin dyes such as Jecylaminocoumarin (hereinafter, coumarin 7), and other coumarin dye-based dyes but also basic yellow 51, And naphthalimid dyes such as Sorbene Toiello and Solvane Toiello.
- DCM piran
- pyridinum-per-park rate examples include viridine dyes such as gin 1), rhodamine
- the fluorescent dye may be selected from the group consisting of polymethacrylate, polyvinyl chloride, polyvinyl chloride copolymer, alkyd resin aromatic sulfonamide resin, urea resin, melamine resin, benzoguanamine resin and the like. Pigmentation may be performed by kneading the resin in advance.
- these fluorescent dyes or pigments may be used alone or as a mixture, if necessary.
- the conversion efficiency of fluorescence to red light is low, the conversion efficiency from light emission to fluorescence can be increased by using the above dyes in combination.
- the binder resin is preferably a transparent (50% or more visible light) material.
- transparent resins polymers such as polymethylmethacrylate, polyacrylate, polycarbonate, polyvinylalcohol, polyvinylvinylidone, hydroxylethylcellulose, carboxymethylcellulose, etc.
- a photosensitive resin to which the photolithography method can be applied in order to separate and arrange the phosphor layers in a plane is also selected.
- a photocurable resist material having a reactive vinyl group such as an acrylic acid type, a methacrylic acid type, a poly (vinyl cinnamate) type, and a ring rubber type may be used.
- a printing method is used, a printing ink (medium) using a transparent resin is selected.
- polyvinyl chloride resin for example, polyvinyl chloride resin, melamine resin, phenolic resin, alkyd resin, epoxy resin, polyurethane resin, polyester resin, maleic acid resin, monomer of polyamide resin, oligomer, polymer or Transparent resins such as polymethylmethacrylate, polyacrylate, polycarbonate, polyvinyl alcohol, polyvinyl vinylidone, hydroxyethyl cellulose, and carboxymethylcellulose should be used. Can be.
- the phosphor layer is mainly composed of a fluorescent dye
- the phosphor layer is formed by vacuum deposition or sputtering through a mask of a desired phosphor layer pattern
- a fluorescent dye and a resin are used
- the fluorescent dye and the above resin and resist are mixed, dispersed or solubilized, and then formed into a film by a method such as spin coating, roll coating, or a casting method.
- patterning is performed using a desired phosphor layer pattern by one method, or patterning is performed using a desired phosphor layer pattern by a method such as screen printing.
- the thickness of the phosphor layer is not limited as long as it does not interfere with the function of generating fluorescence by sufficiently absorbing the light emitted from the organic EL element, and usually varies slightly depending on the fluorescent dye, but is about 10 nm to 1 mm. Is appropriate.
- the concentration of the fluorescent dye may be within a range that does not cause the quenching of the concentration of the fluorescence and that the emission of the organic EL element can be sufficiently absorbed.
- 1-1 0 for Bi Sunda first resin to be used - 4 m 0 about 1 / kg is suitable.
- Examples of the transparent inorganic oxide substrate used in the present invention include a substrate composed of a transparent and electrically insulating inorganic oxide layer described later. However, this board does not need to be electrically insulating.
- Such an inorganic oxide substrate is particularly effective in blocking water vapor, oxygen, organic gas, and the like.
- the plate thickness is as small as possible when phosphor layers that absorb light emitted from the organic EL element and emit different fluorescent light are arranged two-dimensionally in order to emit multicolor light such as the three primary colors of RBG. Is preferable to improve the viewing angle.
- the thickness of the inorganic oxide substrate is usually from 700 m to 1.1 mm for liquid crystal, but in the above case, l / m or more and 700 m or less, more preferably 1 m or more and 200 ⁇ or less.
- the inorganic oxide substrate is difficult to handle and easily ruptured.
- the inorganic oxide substrate has a significant degree of warping, warping, and distortion.
- it exceeds 200 m depending on the definition of the phosphor, the emission of the organic EL element leaks out of the gearbox with the phosphor layer, narrowing the viewing angle of multicolor emission and reducing its practicality. In some cases.
- sealing means used in the present invention there is no particular limitation on the sealing means used in the present invention, and examples thereof include those using a normal adhesive.
- photo-curing and thermosetting adhesives having reactive vinyl groups of acrylic acid-based oligomers, metalacrylate-based oligomers, and moisture-curing type adhesives such as 2-cyanoacrylate.
- Adhesives there can be mentioned a heat and chemical curing type (two-component mixture) such as an epoxy type.
- a heat and chemical curing type two-component mixture
- hot menoleto-type polyimides, polyesters, and polyolefins can be mentioned. Since the organic EL device may be deteriorated by the heat treatment, it is preferable that the device be capable of bonding and curing from room temperature to 80 ° C.
- a commercially available dispenser may be used to apply the adhesive to the sealing portion, or printing may be performed like screen printing.
- the gap provided in the hole is used to reduce the impact or stress on the organic EL element. If the material of the sealing means is applied directly on the organic EL element, the element is likely to be destroyed due to the stress at the time of curing of the material.In addition, since air alone may oxidize the element in the gap, It is preferable to fill an inert gas such as nitrogen or argon or an inert liquid such as a fluorocarbon.
- an inert gas such as nitrogen or argon or an inert liquid such as a fluorocarbon.
- the distance of the gap in this case depends on the definition, but it is better that the distance is small, and it is usually preferable that the distance is several m to 200 m.
- the luminous body protective layer used as necessary includes a phosphor layer and a color filter (including a black matrix) on the outside of the multicolor light-emitting device. Used to protect the skin from damage and degradation by external environmental factors (water, oxygen, light).
- the material is preferably a transparent material (visible light 50% or more).
- acrylate-based or methacrylate-based reactive vinyl group such as a photocurable resin and a thermosetting resin.
- an ultraviolet absorber may be added to the protective layer.
- the phosphor protective layer is formed from the above-mentioned material by a method such as spin coating, roll coating, or casting method in the case of a liquid state.
- the thermosetting type is thermoset as it is after film formation. In the case of a film, the adhesive may be applied as it is and then adhered.
- the thickness of the phosphor protective layer has almost no effect on the viewing angle-there is no particular limitation, but if it is too thick, it will affect the light transmittance, so select from a range of 5 mm from normal. Can be.
- the transparent substrate used as necessary in the present invention includes a glass substrate (inorganic oxide substrate such as soda lime glass, low expansion glass, and quartz plate), a transparent substrate such as a polymer substrate (usually having a visible light transmittance of 5%). (0% or more).
- a glass substrate inorganic oxide substrate such as soda lime glass, low expansion glass, and quartz plate
- a transparent substrate such as a polymer substrate (usually having a visible light transmittance of 5%). (0% or more).
- Thickness has almost no effect on the viewing angle, so there is no particular limitation. However, if it is too thick, it will affect the light transmittance, so it can usually be selected in the range of 1 m to 5 mm.
- This transparent substrate is also used as a protective substrate for the phosphor and as a support substrate when forming the phosphor. After the phosphor is formed, the transparent inorganic oxide substrate is used as a sealing means.
- the organic EL element may be sealed by bonding the substrate with a normal transparent adhesive and joining the substrate to a supporting substrate on which the organic EL element is laminated.
- the color filter and the black matrix used as necessary in the present invention may be, for example, a known material selected by a photolithography method or a printing method. It can be formed by performing patterning. 10. Action of the present invention
- the phosphor layer on the opposite side of the organic EL element via the transparent inorganic oxide substrate, the element such as organic monomer and water vapor generated from the phosphor layer is deteriorated.
- the gas is cut off by the glass substrate, and the organic EL element, and thus, the light emitting life of the multicolor light emitting device can be improved by using the same.
- the effect described above can be expected by using a transparent inorganic oxide substrate for the phosphor on the opposite side of the organic EL element.
- the thickness of the transparent inorganic oxide substrate is 1 m or more and 200 / m or less, not only the effects described above, but also the emission of the organic EL element can be reduced by a fluorescent light other than the desired phosphor layer The absorption in the body layer and the leakage from the gap between the phosphor layers are reduced, and a desired emission color can be obtained. As a result, the viewing angle of multicolor emission can be improved.
- the reason why the phosphor layer is used in place of the power filter is that, as described above, high-efficiency multicolor light emission can be expected as compared with the case where a color filter is provided.
- the phosphor layer may be damaged during handling, or may be degraded by external environmental factors (water, oxygen, light). Therefore, the phosphor layer can be protected by disposing a transparent protective film on the phosphor.
- a transparent substrate can be used as a phosphor protective layer or a support substrate for producing the phosphor layer.
- the second invention of the present application specifically has the following structures (1) to (4). be able to.
- This configuration (1) to (4) Are shown in Figures 9 to 12, respectively.
- the conversion of the emission color of the organic EL element by the phosphor may be any emission color having a longer wavelength than the emission wavelength of the organic EL element, and is not limited to the following red and green colors.
- Transparent support substrate 1 1 Red conversion phosphor layer 3 R, Green conversion phosphor layer 3 GZ Transparent and electrically insulating inorganic oxide layer 1 2
- Organic EL device 1 Transparent electrode 1 aZ Organic material 1 bZ electrode 1 c
- a red color filter and a green color filter are arranged between the red conversion phosphor layer 3R, the green conversion phosphor layer 3G and the transparent substrate, respectively. By doing so, the color purity of red light and green light emitted from each phosphor can be adjusted to increase the color purity.
- a blue color filter 14 is installed in parallel with the red conversion phosphor layer 3R and the green conversion phosphor layer 3G to adjust the color of the emission color of the organic EL element to increase the color purity. Can also.
- a black matrix 9b is arranged at least in the gap between the phosphor layers 3R, 3G and the color finoletor 14, and the organic EL device is provided. Blocks leakage light from element 1 and emits multiple colors Further visibility of light can be improved.
- the transparent and electrically insulating inorganic oxide layer 12 is made into two layers, and the inorganic ion from the lower inorganic oxide layer (for example, soda-lime glass) is formed. Can be suppressed by the upper inorganic oxide layer, and the organic EL element can be protected from the eluted ions.
- the lower inorganic oxide layer for example, soda-lime glass
- the thickness of the transparent and electrically insulating inorganic oxide layer 12 is set to 0.01 m or more and 200 m or less. 0. If less than ⁇ ⁇ , it approaches the single-layer film of inorganic oxide particles, and it is not possible to block degraded gas generated from organic substances such as the lower phosphor layer and the protective layer. If it exceeds m, the emission of the organic EL element 1 leaks from the gear with the phosphor layers 3R and 3G, depending on the definition of the phosphor layers 3R and 3G, and the field of view of the multicolor emission. In some cases, narrowing the corner may reduce the practicality.
- the multicolor light emitting device of the second invention and the manufacturing method of the third invention of the present application will be specifically described for each component.
- the materials used for the constituent elements are those of a minimum necessary limit, and are not limited to these. Matters common to the first invention are omitted as much as possible to avoid duplication.
- the organic EL element used in the present invention is in the same building as in the case of the first invention.
- the same material as in the first invention can be used.
- the anode is formed by depositing a thin film of the above-mentioned material on a desired substrate by a method such as an evaporation method or a sputtering method.
- the pattern of the anode can be formed by patterning in a desired shape by the method. If the pattern precision is irrelevant (about 100 m or more), a positive electrode pattern can be formed through a mask having a desired shape during the evaporation and sputtering of the above materials.
- the preferred transmittance of the anode for the light emission and the preferred sheet resistance of the anode are the same as in the first invention.
- the same material as in the first invention can be used.
- the same one as in the first invention can be used 0
- the same electron injection layer as that of the first invention can be used.o
- the same one as in the first invention can be used.
- the organic EL device used in the present invention can be manufactured in the same manner as in the first invention.
- the transparent support substrate used in the present invention examples include a glass plate, Transparent (visible light transmittance of 50% or more) materials such as plastic plates (polycarbonate, acryl, etc.), plastic films (polyethylene terephthalate, polyether sulfide, etc.), quartz plates, etc.
- Transparent visible light transmittance of 50% or more
- materials such as plastic plates (polycarbonate, acryl, etc.), plastic films (polyethylene terephthalate, polyether sulfide, etc.), quartz plates, etc.
- the thickness of the supporting substrate there is no particular limitation on the thickness of the supporting substrate, as long as the supporting substrate does not warp and warp the thin glass plate laminated thereon and can be reinforced. .
- the same one as in the first invention can be used.
- the transparent and electrically insulating inorganic oxide layer used in the present invention may be formed, for example, by laminating on a phosphor layer or a phosphor protective layer or a transparent adhesive layer described later by vapor deposition, sputtering, diving, or the like. It can be formed.
- the transparent and electrically insulating inorganic oxide layer may be a single layer or a multilayer of two or more layers. For example, by using two layers, the elution of inorganic ions from the lower inorganic oxide layer (for example, soda-lime glass etc.) is suppressed by the upper inorganic oxide layer, and the organic EL is removed from the eluted ions. The element can be protected.
- the lower inorganic oxide layer for example, soda-lime glass etc.
- a glass plate or one or more compounds selected from the group consisting of silicon oxide, aluminum oxide, titanium oxide, and the like described above may be used.
- a glass plate formed on at least one of the upper and lower surfaces of the glass plate it is possible to operate at a low temperature (150 ° C or less) that is sufficient to bond it on the phosphor layer or the protective layer. ⁇ ⁇ More preferable because it does not deteriorate the optical layer or the protective layer at all.
- the glass plate has a great effect of blocking deteriorating gases such as water vapor, oxygen, and monomers.
- the composition of the glass plate examples include those shown in Table 1 or Table 2.
- soda-lime glass, barium and strontium-containing glass, lead glass, aluminate glass, borate glass, barium borate glass and the like can be mentioned.
- the electrically insulating inorganic oxide layer may have any composition as long as it mainly contains an inorganic oxide, and may contain a nitride (for example, Si 3 N 4 ). Good.
- the thickness of the transparent and electrically insulating inorganic oxide layer is not particularly limited as long as it does not hinder the light emission of the organic EL element. In the present invention, the thickness is preferably from 0.01 m to 200 m.
- New A glass plate, or at least one compound selected from the group consisting of silicon oxide, aluminum oxide, titanium oxide, and the like, at least one of the upper and lower surfaces of a transparent insulating glass plate The thickness of the glass plate formed on the substrate is preferably 1 m or more and 200 m or less in terms of accuracy and strength of the glass sheet.
- the transparent and electrically insulating inorganic oxide layer approaches the single-layer film of the inorganic oxide particles and is generated from the organic substance in the phosphor layer or the protective layer. It is difficult to block the deteriorating gas such as water vapor, oxygen or monomer, and if the film thickness exceeds 200 ytm, the emission of the organic EL element will be fluorescent, depending on the definition of the phosphor layer. It may leak from the gap with the body layer, narrow the viewing angle of multicolor light emission, and reduce the practicality of the multicolor light emitting device.
- the deteriorating gas such as water vapor, oxygen or monomer
- inorganic oxides including glass plates, are preferred because they are specifically used as transparent electrodes for organic EL devices, such as inorganic conductive transparent materials such as ITO (indium tin oxide), which is commonly used. This is because materials can be used, and because they have good mutual affinity and good adhesion, etc. 0
- the transparent and electrically insulating inorganic oxide layer used in the present invention is As its physical properties, it is required that it has no factors that generate organic gas such as water vapor, oxygen or monomer, and that it can block intrusion from outside.
- water contained in the inorganic oxide layer is less than 0.1% by weight by thermal analysis (differential thermal analysis DTA, differential operating calorimetry DSC). If the gas permeation coefficient for the oxide layer is 10-ccm / cm2.scmmHg or less according to the gas permeability test method of JISK 7126, etc. Therefore, it is possible to suppress a decrease in the light emission lifetime of the organic EL element due to the above.
- Phosphor protection layer transparent flat film
- the same one as in the first invention can be used.
- the phosphor protective layer is formed of the above-mentioned material by a method such as spin coating, roll coating, or casting in the case of a liquid, and the photocurable resin becomes necessary after irradiation with ultraviolet rays.
- Thermosetting is performed accordingly, and the thermosetting type is thermoset as it is after film formation.
- a sticking agent may be applied and applied as it is.
- the thickness of the phosphor protective layer is preferably from about 0.5 m to about 100 m, and leakage of light emitted from the organic EL element due to the gap between the phosphor layer and the organic EL element is reduced as much as possible (viewing angle Therefore, it is preferable to reduce the film thickness as much as possible. However, if the film thickness is too small, the protective effect of the phosphor is lost depending on the type of the adhesive.
- the transparent adhesive layer optionally used in the present invention includes a substrate having a phosphor layer (including a color filter, a black matrix, and a protective layer as necessary) formed on a transparent support substrate. Particularly, it is preferable to use it when a glass plate is used as the inorganic oxide layer.
- a transparent (50% or more visible light) material is preferable at least in a portion where light emission of the organic EL element is transmitted.
- photo-curable and thermo-curable adhesives having reactive vinyl groups of acrylic acid-based polyols, methacrylic acid-based polyols, 2-cyanoacrylic acid esters, etc. And moisture-curable adhesives. Further, a heat and chemical curing type (two-component mixing) such as an epoxy type can be used.
- Adhesives with low viscosity do not trap air bubbles during lamination and can be laminated uniformly, but in some cases the phosphor layer is dissolved and eroded. So the above protection on the phosphor The layers need to be stacked. Those with high viscosity (about 100 cp or more) are difficult to dissolve and erode the phosphor and may not require a phosphor protective layer, but conversely, air bubbles are trapped during lamination, making uniform lamination difficult. Therefore, the necessity of the phosphor protective layer may be selected depending on the properties of the adhesive.
- the adhesive is applied to the substrate on which the phosphor layer (including the color filter, black matrix, and protective layer, if necessary) is formed by spin coating, mouth coating, casting, etc. Selected from the group consisting of silicon oxide, aluminum oxide, and titanium oxide, on which a transparent electrode of an organic EL element is formed, or on which a transparent electrode is to be formed. One or more compounds are formed on at least one of the upper and lower surfaces of a transparent insulating glass plate, and the light (ultraviolet light) and heat (150 To the extent), and by chemical mixing.
- the thickness of the adhesive is preferably from about 0.1 / zm to about 200 m, so that leakage of light from the organic EL element due to the gap between the phosphor layer and the organic EL element is reduced as much as possible. Therefore, it is preferable to make the film thickness as small as possible. However, if the film thickness is too small, uniform bonding may be difficult due to unevenness between the phosphor layers.
- the color filter and black matrix used as required in the present invention may be, for example, a known material selected at a desired position by a photolithography method or a printing method. It can be formed by performing a nighttime training.
- the inorganic oxide layer having a thickness of 0.01 to 200 m blocks a gas such as water vapor, oxygen, or a monomer, which is considered to be generated from the phosphor layer or the protective layer due to heat generated by the light emission of the organic EL element. Deterioration factors of the organic EL element can be reduced. In particular, when the inorganic oxide layer is a glass plate, the effect of blocking the deteriorated gas is large. As a result, uniform preservation of the multicolor light-emitting device or improvement of the light-emitting life can be achieved.
- the thickness of the inorganic oxide layer is practically sufficient. It is possible to reduce the possibility that light is emitted in unnecessary luminescent colors by being absorbed by the luminescent layers other than the desired phosphor layer and leak from gaps between the luminescent layers, so that a desired luminescent color can be obtained. Improves the viewing angle of multicolor light emission.
- the inorganic oxide layer and the transparent electrode (usually IT 0 : indium tin oxide) have better adhesion than organic substances, and the transparent electrode can be easily patterned (usually a photolithography method). .
- a transparent adhesive layer is disposed at the interface between the inorganic oxide layer and the phosphor layer, particularly when the inorganic oxide layer at the interface between the phosphor layer and the transparent electrode of the organic EL element is a glass plate.
- the adhesion between the organic EL element and the phosphor layer is increased to integrate them.
- a transparent phosphor protective film is arranged between the adhesive layer and the phosphor layer, the phosphor layer is protected from being dissolved and eroded by the adhesive of the adhesive layer.
- this phosphor protective film reduces the thickness difference of the phosphor layers arranged and separated in a plane, reduces the distortion of the inorganic oxide layer on the phosphor layer, and reduces the inorganic oxide layer or Reduce defects such as cracks in the transparent electrode.
- the thin film glass plate is mechanically brittle, and warpage and distortion occur. Therefore, it is difficult to stably fabricate an organic electroluminescent device directly on the glass plate. Therefore, this thin glass plate is bonded via an adhesive layer on a transparent support substrate on which a phosphor layer, a phosphor protective film, etc. are laminated, and In addition, organic electroluminescent devices are sequentially laminated, and a multicolor light emitting device can be stably manufactured.
- One side of a 25 mm X 75 mm X l. 1 mm thick support substrate (Corning glass 705 9) has a carbon black-containing metal acrylate resist (Fuji Hunt Electronics Technology Co., Ltd.) CK 20000) is spin-coated and 200. After baking with C, a black solid film with a thickness of about 2 ⁇ was formed.
- the surface of the substrate opposite to the black film was subjected to I ⁇ cleaning and UV cleaning, and then fixed to a substrate holder of a vacuum evaporation apparatus (manufactured by Nippon Vacuum Engineering Co., Ltd.).
- the evaporation source was prepared by loading MTDATA and NPD as hole injecting materials, DPVBi as light emitting materials, and A1q as electron injecting materials into a molybdenum resistance heating boat.
- Ag was mounted on a tungsten-made filament, and Mg was mounted on a molybdenum boat as an electron-injecting metal for the electrode.
- the pressure in the vacuum chamber was reduced to 5 ⁇ 10 ⁇ 7 t0 rr, and the layers were sequentially stacked in the following order through a mask capable of forming a solid film in a range of 10 mm ⁇ 6 Omm.
- the vacuum was not broken on the way from the electrode to the hole injection layer, and the evacuation was performed once.
- Mg and Ag were co-evaporated as electrodes. That is, M g was a deposition rate of 1.3 to 1.4 nmZs, and Ag was a deposition rate of 0.1 nmZs and the film thickness was 200 nm.
- Alq was deposited at a deposition rate of 0.1 to 0.3 nmZs, the film thickness was 20 nm
- DPVBi was deposited at a deposition rate of 0.1 to 0. s, film thickness 50 ⁇ m, MTDA ⁇ ⁇ ⁇ as the hole injection layer, evaporation rate 0.1 to 0.3 nmZs, film thickness 200 nm, NPD evaporation rate 0.1 to 0.
- Evaporation was performed under the conditions of 3 nm / s and a film thickness of 20 nm.
- the substrate is moved to a sputtering apparatus on this substrate, and IT0 can be solid-film-formed in a range of 10 mm X 60 mm as a transparent electrode having a thickness of 120 nm and a resistance of 20 ⁇ at room temperature.
- An organic EL device was fabricated by forming a film through such a mask.
- the area of the electrode and the area of the transparent electrode were crossed (range of 10 mm ⁇ 55 mm), and the mask was shifted so that the terminal of each electrode could be taken.
- an epoxy-based two-part adhesive (CIBA—GEIGY's Aral Die) was used with a dispenser around the perimeter of the intersection of the electrode and the transparent electrode (range of 10 mm x 55 mm) on this substrate.
- CIBA—GEIGY's Aral Die an epoxy-based two-part adhesive
- a 25 mm ⁇ 75 mm ⁇ 1.1 mm transparent inorganic oxide substrate (barium borate glass) (substrate B) was laminated on the substrate A, and the adhesive was cured. Then, under a nitrogen atmosphere, a fluorocarbon (Fluorinart, manufactured by Sumitomo 3LM Co., Ltd.) was bonded to the supporting substrate (Substrate A) through the gap of the cured adhesive with an injection needle. It was injected into the gap between the substrates B). Next, the gap between the adhesives was further filled with the adhesive and cured.
- a fluorocarbon Fluorinart, manufactured by Sumitomo 3LM Co., Ltd.
- ink was prepared by dissolving 0.03 mo1 / kg (in solid content) of coumarin 6-no-polyvinyl chloride resin (molecular weight: 20,000) in xanthone. (Viscosity 8, OOO cp), clean the 1 mm wide EL characters in the area corresponding to the crossing area (range of 10 mm x 55 mm) between the previous electrode and the transparent electrode. The screen was printed through the plate and air-dried to obtain a phosphor pattern with the letters EL.
- FIG. 1 shows.
- an organic EL multicolor light emitting device segment type
- a voltage of 8 V DC is applied to the transparent electrode (anode) and the electrode (cathode) of the organic EL element
- the voltage is applied to the transparent electrode and the electrode.
- the support substrate (substrate A) on which the organic EL element was fabricated and the transparent inorganic oxide substrate (substrate B) were bonded together, and the substrate was filled with a hydrofluoric hydrocarbon.
- an ink viscosity: 8,000 cp
- the organic EL multicolor light-emitting device (segment type) shown in Fig. 1 is manufactured, and a voltage of 8 V DC is applied to the transparent electrode (anode) and the electrode (cathode) of the organic EL element.
- the emission luminance of the light that can be seen from the phosphor layer patterned with the letters EL is 30 cd m2
- y 0.31
- the red emission is I confirmed that it came out.
- the brightness and chromaticity coordinates did not change at all, and there was no black spot that occurred with deterioration, and uniform light emission was maintained.
- One side of a 100 mm X 100 mm X 1.1 mm support substrate (Glass 7059 manufactured by Koingen Co., Ltd.) has a carbon black-containing metal lithiate resist (Fuji Hunt Electronics Technol. Spin-coat CK 200 000 manufactured by JI Co., Ltd. After baking with C, a black solid film with a thickness of about 2 m was formed.
- the evaporation source was prepared by charging MTDATA and NPD as hole injection materials, DPVBi as light emitting material, and A1q as electron injection material in a molybdenum resistance heating boat. Ag was attached to the tungsten filament and Mg was attached to the molybdenum boat as the electron-injecting metal of the electrode.
- a 1.5 mm pitch (1.4 mm line, 0.1 mm gap) stripe in the range of 72 mm x 72 mm First, a pattern of the electrode is formed through a mask capable of forming a solid film, and then the electron injection layer is formed through a mask capable of forming a solid film in a range of 72 mm X 72 mm. The film was formed up to the hole injection layer. In addition, when the hole injection layer was sequentially laminated from the electrode, it was performed by one evacuation without breaking the vacuum in the middle.
- Mg and Ag were co-evaporated as electrodes. That is, the deposition rate of Mg was set to 1.3 to 1.4 nmZs, and the deposition rate of Ag was set to 0.1 nm / s and the film thickness was set to 200 nm.
- A1q was deposited at a deposition rate of 0.1 to 0.3 nms, the film thickness was 20 nm, and for the light emitting layer, DPVBi was deposited at a deposition rate of 0.1 to 0.3 nm.
- MT DATA has a deposition rate of 0.1 to 0.3 nm, thickness of 400 nm, and NPD has a deposition rate of 0.1 to 0.3 nm, s, and a thickness of 20 nm. Evaporated.
- the substrate was moved to a sputtering apparatus, and IT0 was used as a transparent electrode having a thickness of 120 ⁇ m and a thickness of 20 ⁇ at room temperature.
- the film was formed through a mask capable of forming a film with a 5 mm pitch (4. Omm line 1. Omm gap) stripes, and an organic EL device was fabricated.
- the electrode and the transparent electrode were crossed, and a mask was arranged so that the terminal of each electrode could be taken.
- an epoxy-based two-part adhesive (CIBA—GEIGY Araldide) was used with a dispenser on the periphery of the intersection area (72 mm x 72 mm area) between the electrode and the transparent electrode on this substrate. ) was applied in a width of about 1 mm with a gap left (substrate C).
- a 15 mm thick transparent inorganic oxide substrate (barium borate glass) (substrate D) having a thickness of 15 mm was laminated on the substrate C, and the adhesive was cured. Then, under a nitrogen atmosphere, a fluorocarbon (Fluorinert, manufactured by Sumitomo Suriem Co., Ltd.) was stuck with a support substrate (substrate C) through a gap between the cured adhesive with a syringe needle (substrate D). ). Next, the gap between the adhesives was further filled with the adhesive and cured.
- a fluorocarbon Fluorinert, manufactured by Sumitomo Suriem Co., Ltd.
- the emission luminance of the light seen from the phosphor layer A is 120 cd / m2
- the viewing angle of the organic electroluminescent element in a range where leakage of light emission (single color) was not confirmed was ⁇ 60 ', which was a level that would not pose a problem in practical use.
- a coating agent of an aqueous solution of polyvinyl vinylidone (molecular weight: 360,000) was spin-coated, and air-dried to 10 m. A transparent protective film having a film thickness was deposited.
- the emission luminance of the organic EL multicolor light emitting device shown in FIG. The chromaticity and chromaticity coordinates were the same as in Example 1, and when stored in the atmosphere for two weeks thereafter, there was no change in the luminance and chromaticity coordinates, and there was no black spot that occurred with deterioration, and the uniformity was obtained. Light emission was maintained.
- the protective layer is laminated, even if the phosphor layer is rubbed with a nail, the phosphor layer is not damaged, and the device can be easily carried and handled.
- the emission luminance and chromaticity coordinates of the organic EL multicolor light-emitting device thus manufactured and shown in FIG. 6 were the same as those in Example 3, and the luminance and chromaticity were maintained for two weeks after storage under air. There was no change in the coordinates, and there was no black spot that occurred with deterioration, and uniform light emission was maintained.
- the scope viewing angle can not verify the leakage of light emission of the organic elect port LUMINE Ssensu device (single color) is ⁇ 7 0 ', was at a level that no practical problems c
- the transparent on the phosphor substrate Since the phosphor was laminated, even if the phosphor portion was rubbed with a nail, the phosphor was not damaged, and the device was easily carried and handled.
- a substrate A was manufactured under the same conditions as in Example 1.
- the phosphor side of the substrate E was opposed to the organic EL element side of the substrate A, and the substrates were stuck together, and the adhesive was cured. Then, under a nitrogen atmosphere, fluorocarbon (Fluorinert manufactured by Sumitomo 3LEM) was bonded to the support substrate (substrate A) through the gap of the cured adhesive with an injection needle. It was injected into the gap between the substrates (substrate E). Next, the adhesive was further filled between the adhesive and cured.
- fluorocarbon Fluorinert manufactured by Sumitomo 3LEM
- an organic EL multicolor light emitting device (segment type) as shown in FIG. 7 is manufactured, and a voltage of 8 V DC is applied to the transparent electrode (anode) and the electrode (cathode) of the organic EL element. Light is emitted in the intersection area between the transparent electrode and the electrode to which the voltage is applied.
- the luminance of the blue light emission portion was reduced to 5 cd Zm 2 under the same conditions, and the emission from the EL character pattern was reduced to 7 cd / m 2, which occurred with deterioration. A large number of black spots were generated, resulting in uneven light emission. Contrary to Example 1, it was found that when the phosphor was opposed to the organic EL element side, the emission life of the multicolor light emitting device was significantly adversely affected.
- Substrate C was produced under the same conditions as in Example 3.
- a transparent inorganic oxide substrate (borate acid glass) (substrate F) having a thickness of 100 mm ⁇ 100 mm ⁇ 0.30 mm was laminated on the substrate C.
- an organic EL multicolor light-emitting device (dot matrix type) shown in Fig. 4 was fabricated.
- This multicolor light emitting device was caused to emit light under the same conditions as in Example 3, and the same light emission luminance and chromaticity coordinates were obtained.
- a 20% aqueous solution of polyvinyl alcohol (molecular weight: 500, 000) was spin-coated on the entire surface of the phosphor layer buttered substrate and baked at 80 mm to obtain a transparent protective film having a thickness of 5 / m. .
- a photocurable transparent adhesive of a methacrylate oligomer (3102, manufactured by Three Bond Co., Ltd.) was cast on the protective film to form a 0.12 m-thick, 20 mm thick film.
- IT 0 transparent electrode
- IT 0 transparent electrode
- the glass surface of the glass is laminated and exposed to 3000 mJZ cm2 (365 nm) of ultraviolet light from the IT0 surface, baked at 80 ° C, and then baked on IT0.
- a positive type resist (Fuji Hunt Electronics Technology Co., Ltd .: HPR204) is spin-coated, laminated, baked at 80, and the substrate is set in a brochure exposure machine. After aligning the mask for obtaining a stripe pattern of 1.2 mm line and 0.3 mm gear with phosphors A and B, 100 mJ / cm2 ( (365 nm).
- TMAH tetramethylammonium hydroxide
- the substrate was subjected to IPA cleaning and UV cleaning, and then fixed to a substrate holder of a vapor deposition device (manufactured by Nippon Vacuum Engineering Co., Ltd.).
- the evaporation source was prepared by loading a molybdenum resistance heating boat with MTDATA and NPD as hole injecting materials, DPVBi as light emitting material, and A1q as electron injecting material, respectively.
- Ag was mounted on a tungsten film as the second metal of the electrode, and Mg was mounted on a molybdenum bottle as the cathode electron-injecting metal.
- MT DATA was deposited at a deposition rate of 0.1 to 0.3 nmZs and a film thickness of 200 nm
- NPD was deposited at a deposition rate of 0.1 to 0.3 nmZs and a film thickness of 2 nm.
- DPVB i as the light emitting layer
- evaporation rate 0.1 to 0.3 nm / s film thickness 50 nm
- a 1 q as the electron injection layer
- evaporation rate 0.1 to 0. 3 nmZs film thickness 20 nm, as cathode
- anode ITO stripe pattern Mg and Ag were co-deposited through a vertical, 4 mm line, 0.5 mm gap strip pattern mask. That is, Mg was a deposition rate of 1.3 to 1.4 nmZs, Ag was a deposition rate of 0.1 nmZs, and the film thickness was 200 nm.
- the organic EL multicolor light emitting device shown in FIG. 11 is manufactured, and when a voltage of 8 V DC is applied to the anode and the cathode, the intersection of the anode and the cathode to which the voltage is applied emits light, and the phosphor is emitted.
- Luminance of light visible from the part without the layer is 100 cdZm2
- the emission luminance of the light seen from the phosphor layer A is 120 cd / m2
- the organic EL multicolor light emitting device Even if the organic EL multicolor light emitting device is manufactured as described above and stored under a nitrogen stream for two weeks, the luminance and chromaticity coordinates do not change at all, and there is no black spot that occurs with deterioration, and uniform light emission is obtained. Had been maintained.
- the viewing angle in the range where leakage of light emission (single color) of the organic EL element could not be confirmed was ⁇ 60 °, which was a level that would not pose a problem in practical use.
- the water content of the 50-m-thick glass substrate used in this example was 0.1% by weight or less, and the gas permeability coefficient of water vapor or oxygen with respect to the glass substrate was 10-i3 C c ⁇ cmZ cm2. s ⁇ cmHg or less.
- B buttering substrates prepared in Example 6 a photocurable transparent adhesive of a metal acrylate oligomer (a product of Three Bond Co., Ltd. 31) 1 2) is cast and a 0.1 mm 2 x 100 mm x 50 mm x 50 um thick glass plate (holgaic acid glass) is formed on the entire surface (solid) of IT 0 of 0.1 2 // m film thickness, 20 ⁇ 3
- the glass surfaces were bonded together and exposed to ultraviolet light of 3000 mJ / cm2 (365 nm) from the IT0 surface.
- Example 6 Thereafter, under the same conditions as in Example 6, patterning of ITO and an organic EL device were produced, and an organic EL multicolor light emitting device shown in FIG. 10 was produced.
- This multicolor light-emitting device also obtained the same luminance and chromaticity as in Example 6, and even when stored under a nitrogen stream for two weeks, there was no change in luminance and chromaticity coordinates, and it occurred with deterioration. There was no black spot, and uniform light emission was maintained.
- the viewing angle in the range where leakage of light (single color) of the organic EL element cannot be confirmed is ⁇ 55. This was at a level that would not cause any practical problems.
- a copper phthalocyanine-containing light-curing resist (Fuji Hunt Electronics Technology Co., Ltd .: CB2000) was sprinkled, baked at 80 ° C, and further baked. Then, an oxygen barrier film made of polyvinyl alcohol (manufactured by Fuji Hunt Electronics Technology Co., Ltd .: CP) was sprinkled and baked at 80. Next, the substrate is placed in a proximity exposure , And align it so that the pattern is embedded in the black matrix gear through a mask that provides a stripe pattern of 1.4 mm line and 3.1 mm gap. Exposure was performed with O Om JZ cm2 (365 nm). Furthermore, after developing with an aqueous solution of sodium carbonate in 200, 200. Postbaking with C gave a blue color filter.
- Example 2 On the substrate with the black matrix and the blue color filter, under the same conditions as in Example 1, the phosphor layers A and B were applied to portions other than the blue color filter, and to the black matrix gearbox. Screen printing was performed with the alignment, and the same IT0 film-forming glass plate as in Example 1 having a thickness of 50 m was adhered to perform IT0 patterning.
- the substrate was cleaned by IPA and UV, and then fixed to a substrate holder of a vapor deposition device (manufactured by Nippon Masaki Engineering Co., Ltd.).
- the evaporation sources are MTDATA and NPD as hole injection materials, DPVBi as light-emitting materials, DPAVB as dopants, and DPAVB as electron injection materials in a molybutene resistance heating boat.
- MTDATA and NPD hole injection materials
- DPVBi light-emitting materials
- DPAVB dopants
- DPAVB electron injection materials in a molybutene resistance heating boat.
- Each of q was charged, and Ag was attached to a tungsten filament as a second metal of the cathode, and Mg was attached to a molybutene boat as an electron injecting metal of the cathode.
- the vacuum was not broken on the way from the hole injecting layer to the cathode, but was achieved by a single evacuation.
- MTD ATA is deposited at a deposition rate of 0.1 to 0. S nmZ s and a film thickness of 200 nm
- NPD is deposited at a deposition rate of 0.1 to 0.3 nmZs and a film thickness of 20 nm.
- DPVBi For the light-emitting layer, DPVBi was simultaneously deposited at a deposition rate of 0.1 to 0.3 nmZs and DPAVB at a deposition rate of 0.05 nmmZs, and the total thickness was 40 nm (based on the host material).
- the weight ratio of the dopant is 1.2 to 1.6
- A1q is deposited at a deposition rate of 0.1 to 0.3 nmZs
- the film thickness is 20 nm
- the cathode is perpendicular to the anode IT 0 stripe pattern and has a stripe pattern of 4 mm line and 0.5 mm gap.
- Mg and Ag were co-evaporated through a mask that would be used as a mask. That is, Mg was a deposition rate of 1.3 to 1.4 nmZs, Ag was a deposition rate of 0.1 nmZs, and the film thickness was 200 nm.
- the emission luminance of the light seen from the phosphor layer A is 120 cd / m 2
- the light emission luminance of the light viewed from the phosphor layer B was 30 cd Zm 2
- the organic EL multicolor light emitting device is manufactured as described above and stored under a nitrogen stream for two weeks, there is no change in the luminance and chromaticity coordinates, there is no black spot generated with deterioration, and uniform light emission is maintained. I was In addition, the viewing angle in a range where color mixing was not confirmed during single-color light emission was ⁇ 70 °, which was a level that would not pose a problem in practical use.
- B patterning substrate prepared in Example 6 a methyl acrylate photo-curable resin (V259PPA, manufactured by Nippon Steel Chemical Co., Ltd.) was spin-coated, and the resulting mixture was dried.
- the film was baked with C, exposed to ultraviolet rays of 300 mJZcm2 (365 nm), baked at 150 mm, and a transparent protective film having a thickness of 5 m was laminated.
- a silicon oxide layer was formed on the substrate heated at 180 by a sputtering apparatus to a thickness of 0.01 m over the entire surface. Also, while the substrate was heated at 180 ° C, an entire (solid) film was formed to a thickness of 0.12 m and a thickness of 20 ⁇ by a sputtering apparatus.
- Example 6 ITO patterning and an organic EL element were manufactured under the same conditions as in Example 6, an organic EL multicolor light emitting device shown in FIG. 12 was manufactured, and the same luminance and chromaticity as in Example 1 were obtained. . Furthermore, even when stored under a nitrogen stream for two weeks, there was almost no change in the luminance and chromaticity coordinates, and there were few black spots generated with deterioration, and uniform light emission was maintained. In addition, the viewing angle in a range in which leakage of light emission (single color) of the organic EL element could not be confirmed was approximately ⁇ 90 °, which was a level that would not pose a problem in practical use.
- the water content of the silicon oxide film having a thickness of 0.11 m used in this example was 0.1% by weight or less, and gas of water vapor or oxygen with respect to the silicon oxide film was used.
- the permeability coefficients were 10-i3 cc ⁇ cm / cm 2 ⁇ s ⁇ cm Hg or less, respectively.
- Example 6 ITO patterning and an organic EL device were produced under the same conditions as in Example 6, and an organic EL multicolor light emitting device shown in FIG. 9 was produced.
- the same luminance and chromaticity as in Example 6 were obtained. Further, even when stored under a nitrogen stream for two weeks, there was almost no change in the luminance and chromaticity coordinates, the number of black spots generated with deterioration was small, and uniform light emission was maintained.
- the viewing angle in the range where leakage of light emission (single color) of the organic EL element cannot be confirmed is approximately ⁇ 90. It was at a level that would not be a problem in practical use.
- the water content of the aluminum oxide film having a thickness of 0.1 m used in this example was 0.1% by weight or less, and
- the gas permeation coefficient for the aluminum fluoride membrane was 10-13 cccm / cm 2 ⁇ s ⁇ cmHg or less, respectively.
- Example 6 ITO patterning and an organic EL device were produced under the same conditions as in Example 6, and an organic EL multicolor light emitting device shown in FIG. 9 was produced.
- the same luminance and chromaticity as in Example 6 were obtained. Furthermore, even when stored under a nitrogen stream for two weeks, there was almost no change in the luminance and chromaticity coordinates, and there were few black spots generated with deterioration, and uniform light emission was maintained.
- the viewing angle in a range where leakage of light emission (monochrome) of the organic EL element could not be confirmed was almost ⁇ 90 °, which was a level that would not pose a problem in practical use.
- the water content of the titanium oxide film having a thickness of 0.1 m used in this example was 0.1% by weight or less, and the gas permeability coefficient of water vapor or oxygen with respect to the titanium oxide film was 1%. 0-13 cc ⁇ cm / cm 2 • s ⁇ cmHg or less.
- a photocurable adhesive of a methacrylate-based oligomer (made by Three Bond Co., Ltd .: 3 10 2) is cast on a glass substrate (soda-lime glass) with a thickness of lO OmmX lOO mmX 50 / m (titanium oxide) with a thickness of 0.05 m and a thickness of 0.12 m.
- a glass substrate sina-lime glass
- lO OmmX lOO mmX 50 / m titanium oxide
- the glass surface of the substrate on which the IT 0 of the entire surface is sequentially (solid) formed by sputtering is adhered, and 300 mJ / cm2 (365 nm) of ultraviolet light is exposed from the IT 0 surface. And baked at another 80.
- Example 6 ITO patterning and an organic EL device were manufactured under the same conditions as in Example 6, and an organic EL multicolor light-emitting device shown in FIG. 14 was manufactured.
- the same brightness and chromaticity as in Example 6 were obtained.
- the luminance and chromaticity coordinates did not change much, there were few black spots generated with deterioration, and uniform light emission was maintained.
- the viewing angle of the organic EL element in a range where leakage of light emission (single color) was not confirmed was ⁇ 60 ', which was a level that would not pose a problem in practical use.
- the water content of the 50 / m-thick glass substrate formed with a 0.05-m-thick titanium oxide film used in this example is 0.1% by weight or less.
- gas permeability coefficient for the glass substrate was formed a titanium oxide, Atsuta below respectively 1 0- i3 C c ⁇ c mZ c m2. s ⁇ c mH g.
- a methacrylate-based photocurable resin (Nippon Steel Chemical Co., Ltd .: V259PA) was spin-coated on the phosphor layer A and B patterning substrate prepared in Example 6, and baked at 80 ° C. The film was further exposed to ultraviolet light of 300 mJZ cm2 (365 nm), baked at 150 ° C., and a transparent protective film having a thickness of 5 m was laminated.
- the water content of the phosphor layer and the protective film used in this comparative example was The gas permeation coefficient of water vapor or oxygen with respect to the protective film was 10-is cc ⁇ cm / cm2 ⁇ s ⁇ cmHg or more, respectively.
- a methacrylate-based photocurable resin (V259C, manufactured by Nippon Kagaku Co., Ltd.) was spin-coated on the phosphor layer A, B patterning substrate prepared in Example 6, and heated at 80 ° C. The film was baked, further exposed to ultraviolet light of 300 mJ / cm2 (365 nm), baked at 150, and a transparent protective film having a thickness of 5 m was laminated.
- silicon oxide was laminated on the entire surface of the substrate heated at 180 ° in a thickness of 0.005 m with a sputtering device, and further heated at 180 ° C with a sputtering device.
- a 2 / m-thick film of 20 ITO was entirely (solid) deposited.
- Example 6 under the same conditions as in Example 6, patterning of the ITO, an organic EL device was manufactured, and an organic EL multicolor light emitting device was manufactured. Although the same luminance and chromaticity as in Example 6 were obtained, when stored under a nitrogen stream for two weeks, under the same conditions, the emission luminance of the organic EL element seen from the portion without the phosphor layer was 20 cd / m2 The number of black spots caused by the deterioration was clearly a problem.
- the moisture content of the 0.005 m-thick silicon oxide film used in this comparative example was 0.1% by weight or less.
- Example 6 On a substrate on which the phosphor layers A and B patterns, the luminous body protective film, and the adhesive layer prepared in Example 6 were sequentially laminated, a 0.12 m-thick film having a thickness of 20 ⁇ / m2 was applied.
- Example 6 Thereafter, under the same conditions as in Example 6, patterning of I ⁇ 0, an organic EL device were produced, and an organic EL multicolor light emitting device was produced. Almost the same luminance and chromaticity as in Example 6 were obtained. Furthermore, even when stored under a nitrogen stream for two weeks, there was almost no change in the luminance and chromaticity coordinates, there were few black spots generated with deterioration, and uniform light emission was maintained. The viewing angle in the range where leakage of (monochromatic) cannot be confirmed is almost ⁇ 30 °, and there is a part (angle) where the emission color appears differently in the normally visible range, which is a practical problem.
- Example 6 (Protective film by sol-gel glass technique (planarization layer))
- the phosphor layer A, ⁇ patterned substrate prepared in Example 6 was replaced with a 10% by weight of tetraethoxysilane (Si (0 C 2 H 5) 4) and 1% by weight of water one ethanol containing hydrochloric acid (volume ratio 1: 2) was immersed in a mixture of, by pulling Gently the substrate, oxide phosphor layer a, on B pattern Siri co emissions (S i 0 2) sol was prepared substrate is de Ppuko one tee ring.
- the substrate was heated at 400 to gel the silicon oxide, and a glass-like protective film was laminated on the phosphor layer A and B patterns. Is blackened (carbonized) and deteriorated.
- the substrate was heated at 180 C to gel the silicon oxide, and a glass-like protective film (0.2 m thick) was laminated on the phosphor layer A and B patterns.
- Example 6 a sputtering filming apparatus was used to form a 0.12 m-thick film and a 20-layer (solid) film.
- ITO buttering and an organic EL device were manufactured under the same conditions as in Example 6, and an organic EL multicolor light emitting device shown in FIG. 15 was manufactured, and the same luminance and chromaticity as in Example 6 were obtained.
- two weeks when saved under a stream of nitrogen, the emission luminance of the organic EL element viewed from the portion without the phosphor layer under the same conditions was lowered to 5 c DZM 2, number occurs black spots due to degradation, apparently Was a problem.
- the water content of the sol-gel silicon oxide film having a thickness of 0.2 m used in this comparative example was 1.5% by weight, and the gas permeability coefficient of water vapor or oxygen with respect to the sol-gel silicon oxide film. is at each 1 0-i3 C c ⁇ cm / cm ⁇ ⁇ s ⁇ c mH g or more, the protective film by a sol-gel glass technique was found to be unsuitable.
- the present invention it is possible to provide a multicolor device using an organic EL device having an excellent emission life and an excellent viewing angle characteristic. Further, it is possible to provide a method for stably and efficiently manufacturing the multicolor light emitting device.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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DE69623443T DE69623443T2 (de) | 1995-02-06 | 1996-02-05 | Vielfarbige lichtemissionsvorrichtung und verfahren zur herstellung derselben |
US08/875,756 US5909081A (en) | 1995-02-06 | 1996-02-05 | Multi-color light emission apparatus with organic electroluminescent device |
EP96901538A EP0809420B1 (en) | 1995-02-06 | 1996-02-05 | Multi-color light emission apparatus and method for production thereof |
Applications Claiming Priority (6)
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JP4126795 | 1995-02-06 | ||
JP7/41267 | 1995-02-06 | ||
JP7/49089 | 1995-02-14 | ||
JP04908995A JP3962436B2 (ja) | 1995-02-14 | 1995-02-14 | 多色発光装置 |
JP29911195A JP3187695B2 (ja) | 1995-02-06 | 1995-10-24 | 多色発光装置およびその製造方法 |
JP7/299111 | 1995-10-24 |
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WO1996025020A1 true WO1996025020A1 (fr) | 1996-08-15 |
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US (1) | US5909081A (ja) |
EP (1) | EP0809420B1 (ja) |
DE (1) | DE69623443T2 (ja) |
WO (1) | WO1996025020A1 (ja) |
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JP6808662B2 (ja) | 2018-01-15 | 2021-01-06 | 株式会社Joled | 有機el表示パネルの製造方法、および、有機el表示パネル、有機el表示装置 |
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JPH0265094A (ja) * | 1988-08-29 | 1990-03-05 | Nec Corp | 薄膜el素子及びその製造方法 |
JPH0282491A (ja) * | 1988-09-19 | 1990-03-23 | Hitachi Ltd | 直流発光型el素子の製造方法 |
JPH03280395A (ja) * | 1990-03-28 | 1991-12-11 | Matsushita Electric Ind Co Ltd | 発光体薄膜および薄膜el素子 |
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US5126214A (en) * | 1989-03-15 | 1992-06-30 | Idemitsu Kosan Co., Ltd. | Electroluminescent element |
US5294870A (en) * | 1991-12-30 | 1994-03-15 | Eastman Kodak Company | Organic electroluminescent multicolor image display device |
US5693956A (en) * | 1996-07-29 | 1997-12-02 | Motorola | Inverted oleds on hard plastic substrate |
-
1996
- 1996-02-05 DE DE69623443T patent/DE69623443T2/de not_active Expired - Lifetime
- 1996-02-05 US US08/875,756 patent/US5909081A/en not_active Expired - Lifetime
- 1996-02-05 WO PCT/JP1996/000233 patent/WO1996025020A1/ja active IP Right Grant
- 1996-02-05 EP EP96901538A patent/EP0809420B1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0265094A (ja) * | 1988-08-29 | 1990-03-05 | Nec Corp | 薄膜el素子及びその製造方法 |
JPH0282491A (ja) * | 1988-09-19 | 1990-03-23 | Hitachi Ltd | 直流発光型el素子の製造方法 |
JPH03280395A (ja) * | 1990-03-28 | 1991-12-11 | Matsushita Electric Ind Co Ltd | 発光体薄膜および薄膜el素子 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0845770A1 (en) * | 1996-11-29 | 1998-06-03 | TDK Corporation | Organic electroluminescence display apparatus |
US6268071B1 (en) * | 1997-08-29 | 2001-07-31 | Tdk Corporation | Organic electroluminescent device |
GB2330454B (en) * | 1997-10-14 | 2002-10-02 | Fuji Electric Co Ltd | A polychromatic organic electroluminescent device and a method of manufacturing the same |
CN104379521A (zh) * | 2012-04-26 | 2015-02-25 | 欧司朗Oled股份有限公司 | 光电子器件和用于制造光电子器件的方法 |
US9478761B2 (en) | 2012-04-26 | 2016-10-25 | Osram Oled Gmbh | Optoelectronic component having a UV-protecting substrate and method for producing the same |
Also Published As
Publication number | Publication date |
---|---|
EP0809420A4 (en) | 1998-05-06 |
US5909081A (en) | 1999-06-01 |
EP0809420B1 (en) | 2002-09-04 |
EP0809420A1 (en) | 1997-11-26 |
DE69623443D1 (de) | 2002-10-10 |
DE69623443T2 (de) | 2003-01-23 |
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