WO2004008811A1 - 有機多色発光表示素子およびその製造方法 - Google Patents
有機多色発光表示素子およびその製造方法 Download PDFInfo
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- WO2004008811A1 WO2004008811A1 PCT/JP2003/008844 JP0308844W WO2004008811A1 WO 2004008811 A1 WO2004008811 A1 WO 2004008811A1 JP 0308844 W JP0308844 W JP 0308844W WO 2004008811 A1 WO2004008811 A1 WO 2004008811A1
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- organic
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Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
-
- 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
- H05B33/02—Details
- H05B33/04—Sealing arrangements, e.g. against humidity
-
- 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
- H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
-
- 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
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/842—Containers
- H10K50/8428—Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/846—Passivation; Containers; Encapsulations comprising getter material or desiccants
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/871—Self-supporting sealing arrangements
- H10K59/8723—Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/874—Passivation; Containers; Encapsulations including getter material or desiccant
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/302—Details of OLEDs of OLED structures
- H10K2102/3023—Direction of light emission
- H10K2102/3026—Top emission
Definitions
- the present invention relates to an organic multicolor light-emitting display device that enables high-definition multicolor display with excellent environmental resistance and productivity. For more information, see the image sensor, personal computer, word processor, television, facsimile, audio, video, car navigation, electric desk calculator, telephone, portable terminal, and display devices such as industrial instruments.
- the present invention relates to a multicolor light-emitting display device, and particularly to an organic multicolor light-emitting display device using a color conversion method and a method for manufacturing the same. Background art
- organic electroluminescence As is well known, in the latter half of 1980, with regard to organic electroluminescence (hereinafter referred to as “organic EL”), an element having a thin film laminated structure of organic molecules was applied by Tang et al. It has been reported that high luminance of 100 cd dZm 2 or more can be obtained at 0 V (see Appl. Pys. Lett., 51, 913 (1987)). Research is actively being carried out. Similar devices using organic high molecular weight materials are also being actively developed.
- the problem with the color conversion method which is regarded as promising to obtain a multicolor display element, is that a fluorescent filter for converting the fluorescent light of a desired wavelength into light, moisture, heat, an organic solvent of a specific wavelength. It is very weak, and easily decomposes and loses its function. This imposes restrictions on the method of manufacturing a multicolor organic EL device.
- a color conversion type multicolor organic EL device for example, in a process of forming a transparent electrode ITO, which is an anode of an organic light emitting device (film formation, photo process), generated heat is generated by a color conversion filter. Conversion characteristics (conversion efficiency, color purity) are easily degraded. For this reason, it is difficult to form the organic light emitting element directly on the protective layer.
- a so-called inversion method has been conventionally proposed. That is, a method in which a cathode is formed on a transparent substrate, and then an organic layer, an anode, a protective layer, and a color conversion filter are sequentially formed.
- 3 is a green conversion filter
- 4 is a blue conversion filter
- 5 is a planarization layer
- 6 is a protective layer
- 7 is a transparent lower electrode (anode)
- 8 is a hole injection layer
- 9 is a hole transport layer
- 10 is organic.
- a light emitting layer, 11 is an electron injection layer
- 12 is an upper electrode (cathode)
- 13 is a desiccant
- 14 is a sealing glass (support substrate).
- FIG. 4 is a schematic cross-sectional view showing the overall structure of an organic light emitting device using a conventional color conversion filter, as described above.
- FIG. 4 will be described in further detail, and the problem to be solved by the present invention will be clarified.
- anode (transparent lower electrode) 7 made of a transparent electrode such as ITO patterned on the protective layer 6, a hole injection layer 8 covering the anode 7, and The formed hole transport layer 9, the organic light emitting layer 10 formed on the hole transport layer 9, the electron injection layer 11 formed on the organic light emitting layer 10, and the electron injection layer 11 And a cathode (upper electrode) 12 formed of a metal electrode or the like formed thereon.
- the transparent electrode 7 and the upper electrode 12 are each formed in a line pattern separated at a predetermined interval, and these line patterns are arranged so as to be orthogonal to each other.
- the organic light-emitting element is bonded to a sealing glass 14 provided with a desiccant 13 and a UV-curable adhesive in a dry nitrogen atmosphere (oxygen and water concentration 10 ppm or less) in a glove box.
- the present invention solves the above-mentioned problem of the “organic EL light-emitting device having a structure in which the first substrate having the organic light-emitting layer is bonded to the substrate having one color conversion filter”, and provides stable light emission for a long time. It is an object of the present invention to realize and provide a color conversion type organic EL multicolor display element having good viewing angle characteristics while maintaining characteristics. Disclosure of the invention
- a gap material having a function of drying is provided, and the first gap between the organic light-emitting element portion on the second substrate and the first substrate is spaced by a predetermined distance by the gap material.
- the gap material having a drying function different porosity can be provided on the inner peripheral side and the outer peripheral side, and thereby the following effects can be expected.
- a high-density gap material having a small porosity on the outer peripheral side, it is possible to prevent moisture and the like from entering from entering the inside of the element, and a gap material having a high porosity is disposed on the inner peripheral side.
- the contact interface between the sealed space and the desiccant is increased, making it possible to capture moisture remaining in the atmosphere in the sealed space and moisture that slightly enters from the outside.
- the porosity can be changed arbitrarily and the material has high mechanical strength, that is, inorganic compound materials, particularly metal oxides such as alumina and zirconia, aluminum nitride, silicon nitride, etc. Is applicable. this These materials can be made into a thin film by a sheet molding method (doctor blade, extrusion molding, injection molding, etc.) and can be applied as the gap material of the present invention.
- IZO or ITO is generally used as the transparent lower electrode. Since IZO and ITO used for the transparent lower electrode have high work functions, they are usually suitable for use as an anode, but may be used as a cathode.
- a layer of a material having a small work function may be provided between the transparent lower electrode and the organic EL light emitting layer to improve electron injection efficiency.
- materials having a low work function include alkali metals such as lithium and sodium, alkaline earth metals such as potassium, calcium, magnesium, and strontium; electron-injecting metals such as fluorides thereof; and other materials. Alloys and compounds with metals can be used. In order to improve the electron injection efficiency, it is sufficient to provide a layer of a material having a small work function with a thickness of 10 nm or less, and it is preferable from the viewpoint of maintaining required transparency.
- an alumina plate having a porosity of 1% or less and an alumina plate having a porosity of 90% were used as the outer-gap material 16 and the inner-gap material 17, respectively.
- the dimensions of the alumina plate 16 used as the outer peripheral side gap material were such that the outer peripheral dimension was 50 mm square and the plate width was 2 mm, that is, the inner peripheral dimension was 46 mm square.
- the sealing height of the gap material was set to 10 m.
- the method for producing the alumina plate 16 is as follows.
- the alumina molded body was fired in an air atmosphere at 160 ° C. for 2 hours to obtain a plate-like alumina plate for a gap material having a porosity of 1% or less.
- This alumina plate was formed so that the outer dimension was 50 mm square and the inner dimension was 46 mm square. The thickness of the alumina plate is 10 m.
- an outer peripheral side gap material 16 was obtained.
- the dimensions of the alumina plate 17 on the inner peripheral side were such that the outer peripheral dimension was 46 mm square and the plate width was 2 mm, that is, the inner peripheral dimension was 42 mm square.
- This alumina plate 17 was produced by the doctor blade method similarly to the alumina plate 16 described above.
- the dimensions of the alumina plate 17 on the inner peripheral side with a porosity of 90% were maintained at 46 mm square on the outer peripheral side, and the plate width was set to l mm, that is, the inner peripheral side dimension was 44 mm square.
- the plate width of the inner circumferential gap member 17 By changing the plate width of the inner circumferential gap member 17, the amount of the desiccant (C O) exposed to the atmosphere in the sealing becomes relatively small.
- Color conversion filters 1b, 3b, and 4b made of red, green, and blue dyes or pigments were formed on a transparent support substrate 1b, and a flattening layer 5b and a protective layer 6b were formed later. Further, a transparent lower electrode 7 such as ITO is formed on the protective layer 6 b by patterning, and a hole injection layer 8 b is laminated so as to cover the transparent lower electrode 7. A hole transport layer 9b is formed thereon, an organic light emitting layer 1 Ob is formed on the hole transport layer 9b, an electron injection layer 11b is formed on the organic light emitting layer 1 Ob, and electron injection is further performed. An upper electrode 12b composed of a metal electrode or the like was formed on the layer 11b.
- the structure that extracts light from the side is the bottom emission structure.
- a sealing glass 15b provided with a desiccant 13b such as Ca0 is disposed, and between the sealing glass 15b and the glass substrate 1b on which the organic EL element is disposed.
- These functional layers on the side where the color conversion filter layer and the organic light emitting element portion are provided are Along the non-existing inner peripheral edge and the inner peripheral edge of the first substrate facing the inner peripheral edge, the atmosphere in the sealed space between the first substrate and the second substrate is provided. It has a drying function.
- the method of manufacturing an organic multicolor light emitting display element of the present invention comprises the steps of: laminating at least a first electrode, an organic light emitting layer, and a transparent second electrode on a first substrate to form an organic light emitting element portion. Forming; forming a single color conversion filter on the transparent second substrate that receives electroluminescence from the organic light emitting layer to generate colored light; and forming the organic light emitting element on the first substrate. An inner peripheral edge of the second substrate on which the color conversion filter is not provided, and an inner peripheral edge of the second substrate on the side of the second substrate on which the color conversion filter is provided.
- a gap material having a function of drying an ambient atmosphere is provided along the gap, and the gap material allows the organic light emitting element unit and one color conversion filter to face each other at a predetermined interval.
- 1 substrate And a step of opposing the second substrate and sealing the space between the first substrate and the second substrate.
- another configuration of the method for manufacturing an organic multicolor light emitting display element of the present invention includes preparing a first substrate and a transparent second substrate, and forming a color conversion filter layer on the transparent second substrate. Forming an organic light-emitting element section comprising at least a first electrode, an organic light-emitting layer, and a transparent second electrode, with the transparent second electrode facing one of the color conversion filters.
- the gap material itself has a drying function
- the first substrate provided with the organic light emitting layer and the substrate provided with the color conversion filter layer, which are structurally or spatially restricted can be used.
- the organic EL light emitting device having a laminated structure can also dry the sealed space.
- the gap material having a drying function can have different porosity on the inner peripheral side and the outer peripheral side, and the following effects can be expected.
- a high-density gap material having a small porosity on the outer peripheral side, it is possible to prevent moisture and the like from entering from entering the inside of the element, and a high-porosity gap material is disposed on the inner peripheral side.
- the contact interface between the sealed space and the desiccant is increased, and it is possible to capture the moisture remaining in the atmosphere in the sealed space and moisture that intrudes from the outside.
- the effect of greatly suppressing the influence of moisture on the element can be produced.
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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AU2003281134A AU2003281134A1 (en) | 2002-07-15 | 2003-07-11 | Organic multicolor light-emitting display device and its manufacturing method |
KR10-2004-7021373A KR20050010981A (ko) | 2002-07-15 | 2003-07-11 | 유기 다색 발광표시소자 및 그 제조방법 |
GB0426387A GB2406701B (en) | 2002-07-15 | 2003-07-11 | Organic multicolor emission and display device and method for manufacturing same |
US10/520,951 US7446472B2 (en) | 2002-07-15 | 2003-07-11 | Organic multicolor emission and display device and method for manufacturing same |
US11/927,639 US20080081389A1 (en) | 2002-07-15 | 2007-10-29 | Organic multicolor emission and display device and method for manufacturing same |
Applications Claiming Priority (2)
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JP2002-206226 | 2002-07-15 | ||
JP2002206226A JP2004047387A (ja) | 2002-07-15 | 2002-07-15 | 有機多色発光表示素子およびその製造方法 |
Related Child Applications (1)
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US11/927,639 Division US20080081389A1 (en) | 2002-07-15 | 2007-10-29 | Organic multicolor emission and display device and method for manufacturing same |
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WO2004008811A1 true WO2004008811A1 (ja) | 2004-01-22 |
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PCT/JP2003/008844 WO2004008811A1 (ja) | 2002-07-15 | 2003-07-11 | 有機多色発光表示素子およびその製造方法 |
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US (2) | US7446472B2 (ja) |
JP (1) | JP2004047387A (ja) |
KR (1) | KR20050010981A (ja) |
AU (1) | AU2003281134A1 (ja) |
GB (1) | GB2406701B (ja) |
TW (1) | TWI260182B (ja) |
WO (1) | WO2004008811A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
KR20050010981A (ko) | 2005-01-28 |
GB2406701A (en) | 2005-04-06 |
US7446472B2 (en) | 2008-11-04 |
TWI260182B (en) | 2006-08-11 |
GB2406701B (en) | 2005-12-07 |
GB0426387D0 (en) | 2005-01-05 |
JP2004047387A (ja) | 2004-02-12 |
US20050174048A1 (en) | 2005-08-11 |
TW200423803A (en) | 2004-11-01 |
US20080081389A1 (en) | 2008-04-03 |
AU2003281134A1 (en) | 2004-02-02 |
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