CN104064683A - Organic electroluminescent device - Google Patents
Organic electroluminescent device Download PDFInfo
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- CN104064683A CN104064683A CN201310092892.8A CN201310092892A CN104064683A CN 104064683 A CN104064683 A CN 104064683A CN 201310092892 A CN201310092892 A CN 201310092892A CN 104064683 A CN104064683 A CN 104064683A
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- sealing ring
- substrate
- cover plate
- electroluminescence device
- organic electroluminescence
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- 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
- H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
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- 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
- H10K50/844—Encapsulations
-
- 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
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
Abstract
The invention relates to an organic electroluminescent device. The organic electroluminescent device comprises a substrate, an organic luminescence unit, a packaging cover plate, and a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring which are arranged on the substrate. The packaging cover plate and the substrate are arranged at an interval, the organic luminescence unit is arranged on the substrate and is disposed between the substrate and the packaging cover, and the first sealing ring sleeves the organic luminescence unit; the second sealing ring sleeves the first sealing ring; the third sealing ring sleeves the second sealing ring; the fourth sealing ring sleeves the third sealing ring; the respective two opposite side surfaces of first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are respectively fixedly connected with the substrate and the packaging cover plate; and the first sealing ring is composed of a first light-cured adhesive and a first water absorbing agent, the second sealing ring is composed of a second light-cured adhesive, the third sealing ring is composed of a third light-cured adhesive and a second water absorbing agent, and the fourth sealing ring is composed of a fourth light-cured adhesive. The service life of the device is quite long.
Description
Technical field
The present invention relates to electroluminescent technology field, particularly relate to a kind of organic electroluminescence device.
Background technology
Along with the environmental protection energy, the development trend that mobile communication and information show, organic electroluminescent (OLED) display lighting technical development is at present more and more rapider, along with the expansion of application.
Stabilized illumination is that can OLED luminescent device the first-selected problem that needs solution of commercial applications.Because the most organic substances in OLED luminescent layer are all very responsive for the water in atmosphere, oxygen molecule, easily make compound in organic layer that hydrolysis or oxidation occur, thereby make organic molecule degraded, lose its corresponding function in OLED, thereby cause OLED component failure.Therefore, need to ensure by encapsulation the sealing of OLED device inside, reduce as much as possible and the contacting of the water of external environment condition, oxygen molecule.For the OLED device of rigid substrates, conventionally adopt glass cover-plate or metal cover board encapsulation, form hermetically-sealed construction by UV glue bond, because these cover plate materials itself have good barrier property, but this easily there are some defects in UV glue when curing, cause water, oxygen molecule can penetrate UV glue and arrive OLED device inside, thereby make component failure, useful life is shorter.
Summary of the invention
Based on this, be necessary the problem shorter for the useful life of existing organic electroluminescence device, the organic electroluminescence device of growing a kind of useful life is provided.
A kind of organic electroluminescence device, comprise substrate, organic light-emitting units and encapsulation cover plate, described encapsulation cover plate and described substrate interval arrange, described organic light-emitting units is arranged on described substrate and between described substrate and described encapsulation cover plate, also comprise the first sealing ring, the second sealing ring, the 3rd sealing ring and the 4th sealing ring, described organic light-emitting units covers the part surface of described substrate, described the first sealing ring be arranged on described substrate and be sheathed on described organic light-emitting units and two relative sides of described the first sealing ring affixed with described substrate and described encapsulation cover plate respectively, described the second sealing ring is arranged on described substrate and to be sheathed on two relative sides of described the first sealing ring and described the second sealing ring affixed with described substrate and described encapsulation cover plate respectively, described the 3rd sealing ring is arranged on described substrate and to be sheathed on two relative sides of described the second sealing ring and described the 3rd sealing ring affixed with described substrate and described encapsulation cover plate respectively, described the 4th sealing ring is arranged on described substrate and to be sheathed on two relative sides of described the 3rd sealing ring and described the 4th sealing ring affixed with described substrate and described encapsulation cover plate respectively, wherein, described the first sealing ring is made up of the first Photocurable adhesive and the first water absorbing agent, described the second sealing ring is made up of the second Photocurable adhesive, and described the 3rd sealing ring is made up of the 3rd Photocurable adhesive and the second water absorbing agent, and described the 4th sealing ring is made up of the 4th Photocurable adhesive.
In an embodiment, the width of described the first sealing ring is 1 millimeter～5 millimeters therein.
In an embodiment, the width of described the second sealing ring is 1 millimeter～5 millimeters therein.
In an embodiment, the width of described the 3rd sealing ring is 1 millimeter～5 millimeters therein.
In an embodiment, the width of described the 4th sealing ring is 5 millimeters～10 millimeters therein.
In an embodiment, the spacing of spacing, the second sealing ring and the 3rd sealing ring of described the first sealing ring and the second sealing ring and the spacing of the 3rd sealing ring and the 4th sealing ring are 2 millimeters～10 millimeters therein.
In an embodiment, described the first Photocurable adhesive, the second Photocurable adhesive, the 3rd Photocurable adhesive and the 4th Photocurable adhesive are epobond epoxyn, acrylic ester adhesive or type siloxane Photocurable adhesive therein.
In an embodiment, described the first water absorbing agent and the second water absorbing agent are selected from least one in titanium dioxide, zirconia, calcium oxide, strontium oxide strontia, barium monoxide, calcium chloride and magnesium chloride therein.
In an embodiment, described titanium dioxide, zirconia, calcium oxide, strontium oxide strontia, barium monoxide, calcium chloride and magnesium chloride are that particle diameter is the nano particle of 100 nanometer～250 nanometers therein.
In an embodiment, the mass percent that described the first water absorbing agent accounts for described the first sealing ring is 1～30% therein; The mass percent that described the second absorbent accounts for described the 3rd sealing ring is 1～30%.
Above-mentioned organic electroluminescence device encapsulation cover plate is by the first sealing ring, the second sealing ring, the 3rd sealing ring and the 4th sealing ring are arranged on substrate and form airtight host cavity with substrate, the first sealing ring, the second sealing ring, the 3rd sealing ring and the 4th sealing ring play the level Four effect of being bonded and sealed, can stop water and the oxygen formation level Four of infiltrating host cavity inside, and the first sealing ring and the 3rd sealing ring also can absorb and avoid hydrone to spread in host cavity infiltrating its inner hydrone respectively, thereby reduce water oxygen osmotic effect, can effectively protect the organic light-emitting units in host cavity, make the useful life of this organic electroluminescence device longer.
Brief description of the drawings
Fig. 1 is the profile of the organic electroluminescence device of an execution mode;
Fig. 2 is the vertical view that the organic electroluminescence device shown in Fig. 1 has omitted encapsulation cover plate.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.A lot of details are set forth in the following description so that fully understand the present invention.But the present invention can implement to be much different from alternate manner described here, and those skilled in the art can do similar improvement without prejudice to intension of the present invention in the situation that, and therefore the present invention is not subject to the restriction of following public concrete enforcement.
Refer to Fig. 1, the organic electroluminescence device 100 of an execution mode, comprises substrate 10, organic light-emitting units 20, the first sealing ring 30, the second sealing ring 40, the 3rd sealing ring 50, the 4th sealing ring 60 and encapsulation cover plate 70.Substrate 10 arranges with encapsulation cover plate 70 intervals, and organic light-emitting units 20 is arranged on substrate 10 and between substrate 10 and encapsulation cover plate 70.
Substrate 10 is glass substrate.
Organic light-emitting units 20 comprises the anode (not shown), hole transmission layer (not shown), luminescent layer (not shown), electron injecting layer (not shown) and the negative electrode (not shown) that stack gradually on substrate 10.
Anode is formed by indium tin oxide (ITO).The thickness of anode is 100 nanometers.
Hole transmission layer is by N, N'-diphenyl-N, and N'-bis-(1-naphthyl)-1,1'-biphenyl-4,4'-diamines (NPB) forms.The thickness of hole transmission layer is 50 nanometers.
Luminescent layer is by (oxine)-aluminium (Alq
3) form (oxine)-aluminium (Alq
3) thering is electronic transmission performance, luminescent layer has luminous and electronic transmission performance concurrently.The thickness of luminescent layer is 30 nanometers.
Electron injecting layer is formed by lithium fluoride (LiF).The thickness of electron injecting layer is 1 nanometer.
Negative electrode is formed by argent (Ag).The thickness of negative electrode is 100 nanometers.
Organic light-emitting units 20 is arranged on substrate 10, the part surface of covered substrate 10.Preferably, organic light-emitting units 20 is arranged at the middle part of substrate 10.
Organic light-emitting units 20 can rectangle sheet structure, square sheet structure, round sheet structure or oval sheet structure, can be also other irregular shapes.Please refer to Fig. 2, in present embodiment, organic light-emitting units 20 is square sheet structure.
Side S1 and the encapsulation cover plate 70 of the first sealing ring 30 are affixed, and the side relative with side S1 and substrate 10 are affixed.
The first sealing ring 30 is made up of the first Photocurable adhesive and the first water absorbing agent, makes the first sealing ring 30 have the effect of bonding and water suction concurrently.
Preferably, the first Photocurable adhesive is epobond epoxyn, acrylic ester adhesive or type siloxane Photocurable adhesive.
The first water absorbing agent is selected from titanium dioxide (TiO
2), zirconia (ZrO), calcium oxide (CaO), strontium oxide strontia (SrO), barium monoxide (BaO), calcium chloride (CaCl
2) and magnesium chloride (MgCl
2) at least one.
In the time that the first absorbent is made up of two or more in above-mentioned substance, the quality of each component equates.
Preferably, titanium dioxide (TiO
2), zirconia (ZrO), calcium oxide (CaO), strontium oxide strontia (SrO), barium monoxide (BaO), calcium chloride (CaCl
2) and magnesium chloride (MgCl
2) to be particle diameter be the nano particle between 100 nanometer～250 nanometers, can fully mixing with the first Photocurable adhesive.
Preferably, the mass percent that the first water absorbing agent accounts for the first sealing ring 30 is 1～30%, to ensure that the first sealing ring 30 has higher water absorbing properties and stronger bonding strength.
Comprehensive bonding strength and cost consideration, the width of the first sealing ring 30 is preferably 1～5 millimeter.Width is that 1～5 millimeter of live width that refers to each limit that surrounds the first sealing ring 30 is 1～5 millimeter, and the first sealing ring 30 is being parallel to the thickness of direction of substrate 10.In other embodiments, when the first sealing ring 30 is other shapes, as while being circular or oval, refer to surround circle or live width oval and composition the first sealing ring 30 is 1～5 millimeter.
Side S2 and the encapsulation cover plate 70 of the second sealing ring 40 are affixed, and the side relative with side S2 and substrate 10 are affixed.
The second sealing ring 40 is also square circle.The second sealing ring 40 is arranged on substrate 10 and be sheathed on the periphery of the first sealing ring 30.The geometric center of the second sealing ring 40 overlaps with the geometric center of the first sealing ring 30.
The second sealing ring 40 is made up of the second light curing agent.
Preferably, the second Photocurable adhesive is epobond epoxyn, acrylic ester adhesive or type siloxane Photocurable adhesive.
Comprehensive bonding strength and cost consideration, the width on each limit of the second sealing ring 40 is preferably 1～5 millimeter.
The spacing of the second sealing ring 40 and the first sealing ring 30 is preferably 2～10 millimeters, can not allow same defect continue growth at same position, to ensure the continuation sealing property of the first sealing ring 30 and the second sealing ring 40 and the barrier properties to water and oxygen.
Side S3 and the encapsulation cover plate 70 of the 3rd sealing ring 50 are affixed, and the side relative with side S3 and substrate 10 are affixed.
The 3rd sealing ring 50 is also square circle.The 3rd sealing ring 50 is arranged on substrate 10 and is sheathed on the periphery of the second sealing ring 40.The geometric center of the 3rd sealing ring 50 overlaps with the geometric center of the second sealing ring 40.
The 3rd sealing ring 50 is made up of the 3rd Photocurable adhesive and the second water absorbing agent, makes the 3rd sealing ring 50 have the effect of bonding and water suction concurrently.
Preferably, the 3rd Photocurable adhesive is epobond epoxyn, acrylic ester adhesive or type siloxane Photocurable adhesive.
The second water absorbing agent is selected from titanium dioxide (TiO
2), zirconia (ZrO), calcium oxide (CaO), strontium oxide strontia (SrO), barium monoxide (BaO), calcium chloride (CaCl
2) and magnesium chloride (MgCl
2) at least one.
In the time that the second absorbent is made up of two or more in above-mentioned substance, the quality of each component equates.
Preferably, titanium dioxide (TiO
2), zirconia (ZrO), calcium oxide (CaO), strontium oxide strontia (SrO), barium monoxide (BaO), calcium chloride (CaCl
2) and magnesium chloride (MgCl
2) to be particle diameter be the nano particle between 100 nanometer～250 nanometers, can fully mixing with the 3rd Photocurable adhesive.
Preferably, the mass percent that the second water absorbing agent accounts for the 3rd sealing ring 50 is 1～30%, to ensure that the 3rd sealing ring 50 has higher water absorbing properties and stronger bonding strength.
Preferably, the width of the 3rd sealing ring 50 is 1～5 millimeter, and the spacing of the 3rd sealing ring 50 and the second sealing ring 40 is 2～10 millimeters.
Side S4 and the encapsulation cover plate 70 of the 4th sealing ring 60 are affixed, and the side relative with side S4 and substrate 10 are affixed.
The 4th sealing ring 60 is square circle.The 4th sealing ring 60 is arranged on substrate 10 and is sheathed on the periphery of the 3rd sealing ring 50.The geometric center of the 4th sealing ring 60 overlaps with the geometric center of the 3rd sealing ring 50.
The 4th sealing ring 60 is made up of the 4th Photocurable adhesive.
Preferably, the 4th Photocurable adhesive is epobond epoxyn, acrylic ester adhesive or type siloxane Photocurable adhesive.
As the first line of defence of exclusion of water and oxygen, the width on each article of limit of the 4th sealing ring 60 is preferably 2～10 millimeters, so that the adhesion strength of the 4th sealing ring 60 is higher, forms the higher the first line of defence of reliability.
The spacing of the 4th sealing ring 60 and the 3rd sealing ring 50 is preferably 2～10 millimeters.
Encapsulation cover plate 70 is metal cover board or glass cover-plate.Two relative sides of the first sealing ring 30 are affixed with substrate 10 and encapsulation cover plate 70 respectively, two relative sides of the second sealing ring 40 are affixed with substrate 10 and encapsulation cover plate 70 respectively, two relative sides of the 3rd sealing ring 50 are affixed with substrate 10 and encapsulation cover plate 70 respectively, two relative sides of the 4th sealing ring 60 are affixed with substrate 10 and encapsulation cover plate 70 respectively, by the first sealing ring 30, the second sealing ring 40, the cementation of the 3rd sealing ring 50 and the 4th sealing ring 60 is arranged on substrate 10 encapsulation cover plate 50, and form airtight host cavity 80 with substrate 10, organic light-emitting units 20 is contained in host cavity 80.
The organic light-emitting units 20 of above-mentioned organic electroluminescence device 100 is contained in by substrate 10, the first sealing ring 30, the second sealing ring 40, the 3rd sealing ring 50, in the airtight host cavity 80 that the 4th sealing ring 60 and encapsulation cover plate 70 surround, substrate 10 and encapsulation cover plate 70 all have good barrier property, the first sealing ring 30, the second sealing ring 40, the 3rd sealing ring 50 and the 4th sealing ring 60 play the level Four effect of being bonded and sealed, can stop water and the oxygen formation level Four of infiltrating host cavity 80 inside, and the first sealing ring 30 and the 3rd sealing ring 50 also can absorb and avoid hydrone to the interior diffusion of host cavity 80 infiltrating its inner hydrone respectively, thereby reduce water oxygen osmotic effect, can effectively protect the organic light-emitting units 20 in host cavity 80, make the useful life of organic electroluminescence device 100 longer.
The first sealing ring 30 is made up of the first Photocurable adhesive and the first water absorbing agent, the 3rd sealing ring 50 is made up of the 3rd Photocurable adhesive and the second water absorbing agent, make the first sealing ring 30 and the 3rd sealing ring 50 have cementation and water sorption concurrently, but due to the existence of the first water absorbing agent and the second water absorbing agent, the adhesion strength of the first sealing ring 30 and the 3rd sealing ring 50 is declined slightly.The first sealing ring 30, the second sealing ring 40, the 3rd sealing ring 50 and the 4th sealing ring 60 are sheathed on the periphery of organic light-emitting units 20 successively, having the second sealing ring 40 and the 4th sealing ring 60 that the first sealing ring 30 of cementation and water sorption and the 3rd sealing ring 50 and adhesion strength are higher concurrently is arranged alternately, when can ensureing enough adhesion strengths, retain the water sorption of the first sealing ring 30 and the 3rd sealing ring 50, make organic electroluminescence device 100 obtain the water of continuation and the blocking effect of oxygen, extended its useful life.
Be appreciated that, the shape of the first sealing ring 30, the second sealing ring 40, the 3rd sealing ring 50 and the 4th sealing ring 60 is not limited to square circle, also can be other shapes, as circular, oval etc., only need be sheathed on respectively organic light-emitting units 20, to can form airtight host cavity completely.
It should be noted that, the implication of the width of the second sealing ring 40, the 3rd sealing ring 50 and the 4th sealing ring 60 is identical with the implication of the width of the first sealing ring 30.
It should be noted that, with the geometric center of the first sealing ring 30 for a bit, towards any direction do one article with all crossing straight lines of the first sealing ring 30, the second close circle 40, the 3rd sealing ring 50 and the 4th sealing ring 60, two the first intersection points of this straight line and the crossing generation of the first sealing ring 30, with two the second intersection points of the crossing generation of the second sealing ring 40, with two the 3rd intersection points of the crossing generation of the 3rd sealing ring 50, with two the 4th intersection points of the crossing generation of the 4th sealing ring 60.The spacing of the first sealing ring 30 and the second sealing ring 40 refers to away from the first intersection point of organic light-emitting units 20 and near the distance between the second intersection point of organic light-emitting units 20; The spacing of the second sealing ring 40 and the 3rd sealing ring 50 refers to away from the second intersection point of organic light-emitting units 20 and near the distance between the 3rd intersection point of organic light-emitting units 20; The spacing of the 3rd sealing ring 50 and the 4th sealing ring 60 refers to away from the 3rd intersection point of organic light-emitting units 20 and near the distance between the 4th intersection point of organic light-emitting units 20.
It is below specific embodiment.
Embodiment 1
After clean cleaning glass substrate and dry, adopt vacuum evaporation on glass substrate, to form successively anode, hole transmission layer, luminescent layer, electron injecting layer and negative electrode, anode, hole transmission layer, luminescent layer, electron injecting layer and negative electrode stack gradually and form the organic light-emitting units being laminated on glass substrate, organic light-emitting units is arranged at the middle part of glass substrate, and the part surface of cover glass substrate; Wherein, anode is formed by indium tin oxide, and the thickness of anode is 100 nanometers; Hole transmission layer is by N, N'-diphenyl-N, and N'-bis-(1-naphthyl)-1,1'-biphenyl-4,4'-diamines forms, and the thickness of hole transmission layer is 50 nanometers; Luminescent layer is formed by (oxine)-aluminium, and the thickness of luminescent layer is 30 nanometers; Electron injecting layer is formed by lithium fluoride, and the thickness of electron injecting layer is 1 nanometer; Negative electrode is formed by argent, and the thickness of negative electrode is 100 nanometers;
The Zirconium oxide nano grain and the propenoic acid ester photocureable adhesive that are 100 nanometers by particle diameter carry out ultrasonic first mixture that is mixed to get, this first mixture is coated on glass substrate, on glass substrate, forms the first square circle that is sheathed on organic light-emitting units;
Propenoic acid ester photocureable adhesive is coated on glass substrate, on glass substrate, forms the second square circle that is sheathed on the first square circle periphery;
The Zirconium oxide nano grain and the propenoic acid ester photocureable adhesive that are 100 nanometers by particle diameter carry out ultrasonic second mixture that is mixed to get, this second mixture is coated on glass substrate, on glass substrate, forms the 3rd square circle that is sheathed on the second square circle periphery;
Propenoic acid ester photocureable adhesive is coated on glass substrate, on glass substrate, forms the 4th square circle that is sheathed on the 3rd square circle periphery;
Using metal cover board as encapsulation cover plate, encapsulation cover plate is positioned on glass substrate, and enclose with the first square, the second square circle, the 3rd square and the 4th square circle contact, under UV lamp, irradiate, the first square circle solidify to form the first sealing ring that is sheathed on organic light-emitting units, the second square circle solidify to form the second sealing ring that is sheathed on the first sealing ring periphery, the 3rd square circle solidify to form the 3rd sealing ring that is sheathed on the second sealing ring periphery, the 4th square circle solidify to form the 4th sealing ring that is sheathed on the 3rd sealing ring periphery, two relative sides of the first sealing ring are affixed with glass substrate and encapsulation cover plate respectively, two relative sides of the second sealing ring are affixed with glass substrate and encapsulation cover plate respectively, two relative sides of the 3rd sealing ring are affixed with glass substrate and encapsulation cover plate respectively, two relative sides of the 4th sealing ring are affixed with glass substrate and encapsulation cover plate respectively, thereby encapsulation obtains organic electroluminescence device,
In this organic electroluminescence device, the geometric center of the geometric center of the first sealing ring, the geometric center of the second sealing ring, the 3rd sealing ring and the geometric center of the 4th sealing ring overlap, the width of the first sealing ring is 1 millimeter, and particle diameter is that the mass percent that the Zirconium oxide nano grain of 100 nanometers accounts for the first sealing ring is 1%; The spacing of the second sealing ring and the first sealing ring is 2 millimeters, and the width of the second sealing ring is 10 millimeters; The width of the 3rd sealing ring is 1 millimeter, and particle diameter is that mass percent that the Zirconium oxide nano grain of 100 nanometers accounts for the first sealing ring is that the spacing of 1%, the three sealing ring and the second sealing ring is 2 millimeters; The spacing of the 4th sealing ring and the 3rd sealing ring is 10 millimeters, and the width of the 4th sealing ring is 1 millimeter.
Embodiment 2
After clean cleaning glass substrate and dry, adopt vacuum evaporation on glass substrate, to form successively anode, hole transmission layer, luminescent layer, electron injecting layer and negative electrode, anode, hole transmission layer, luminescent layer, electron injecting layer and negative electrode stack gradually and form the organic light-emitting units being laminated on glass substrate, organic light-emitting units is arranged at the middle part of glass substrate, and the part surface of cover glass substrate; Wherein, anode is formed by indium tin oxide, and the thickness of anode is 100 nanometers; Hole transmission layer is by N, N'-diphenyl-N, and N'-bis-(1-naphthyl)-1,1'-biphenyl-4,4'-diamines forms, and the thickness of hole transmission layer is 50 nanometers; Luminescent layer is formed by (oxine)-aluminium, and the thickness of luminescent layer is 30 nanometers; Electron injecting layer is formed by lithium fluoride, and the thickness of electron injecting layer is 1 nanometer; Negative electrode is formed by argent, and the thickness of negative electrode is 100 nanometers;
The barium monoxide nano particle and the epoxy resin Photocurable adhesive that are 250 nanometers by particle diameter carry out ultrasonic first mixture that is mixed to get, this first mixture is coated on glass substrate, on glass substrate, forms the first square circle that is sheathed on organic light-emitting units;
Epoxy resin Photocurable adhesive is coated on glass substrate, on glass substrate, forms the second square circle that is sheathed on the first square circle periphery;
The barium monoxide nano particle and the propenoic acid ester photocureable adhesive that are 250 nanometers by particle diameter are mixed to get the second mixture, this second mixture is coated on glass substrate, on glass substrate, forms the 3rd square circle that is sheathed on the second square circle periphery;
Epoxy resin Photocurable adhesive is coated on glass substrate, on glass substrate, forms the 4th square circle that is sheathed on the 3rd square circle periphery;
Using metal cover board as encapsulation cover plate, encapsulation cover plate is positioned on glass substrate, and enclose with the first square, the second square circle, the 3rd square and the 4th square circle contact, under UV lamp, irradiate, the first square circle solidify to form the first sealing ring that is sheathed on organic light-emitting units, the second square circle solidify to form the second sealing ring that is sheathed on the first sealing ring periphery, the 3rd square circle solidify to form the 3rd sealing ring that is sheathed on the second sealing ring periphery, the 4th square circle solidify to form the 4th sealing ring that is sheathed on the 3rd sealing ring periphery, two relative sides of the first sealing ring are affixed with glass substrate and encapsulation cover plate respectively, two relative sides of the second sealing ring are affixed with glass substrate and encapsulation cover plate respectively, two relative sides of the 3rd sealing ring are affixed with glass substrate and encapsulation cover plate respectively, two relative sides of the 4th sealing ring are affixed with glass substrate and encapsulation cover plate respectively, thereby encapsulation obtains organic electroluminescence device,
In this organic electroluminescence device, the geometric center of the geometric center of the first sealing ring, the geometric center of the second sealing ring, the 3rd sealing ring and the geometric center of the 4th sealing ring overlap, the width of the first sealing ring is 5 millimeters, and particle diameter is that the mass percent that the barium monoxide nano particle of 250 nanometers accounts for the first sealing ring is 30%; The spacing of the second sealing ring and the first sealing ring is 5 millimeters, and the width of the second sealing ring is 5 millimeters; The width of the 3rd sealing ring is 5 millimeters, and particle diameter is that mass percent that the barium monoxide nano particle of 250 nanometers accounts for the 3rd sealing ring is that the spacing of 30%, the three sealing ring and the second sealing ring is 5 millimeters; The spacing of the 4th sealing ring and the 3rd sealing ring is 5 millimeters, and the width of the 4th sealing ring is 5 millimeters.
Embodiment 3
After clean cleaning glass substrate and dry, adopt vacuum evaporation on glass substrate, to form successively anode, hole transmission layer, luminescent layer, electron injecting layer and negative electrode, anode, hole transmission layer, luminescent layer, electron injecting layer and negative electrode stack gradually and form the organic light-emitting units being laminated on glass substrate, organic light-emitting units is arranged at the middle part of glass substrate, and the part surface of cover glass substrate; Wherein, anode is formed by indium tin oxide, and the thickness of anode is 100 nanometers; Hole transmission layer is by N, N'-diphenyl-N, and N'-bis-(1-naphthyl)-1,1'-biphenyl-4,4'-diamines forms, and the thickness of hole transmission layer is 50 nanometers; Luminescent layer is formed by (oxine)-aluminium, and the thickness of luminescent layer is 30 nanometers; Electron injecting layer is formed by lithium fluoride, and the thickness of electron injecting layer is 1 nanometer; Negative electrode is formed by argent, and the thickness of negative electrode is 100 nanometers;
Be that the magnesium chloride nano particle of 200 nanometers and particle diameter are that calcium chloride nano particle and the siloxanes Photocurable adhesive of 200 nanometers carries out ultrasonic first mixture that is mixed to get by particle diameter, this first mixture is coated on glass substrate, on glass substrate, forms the first square circle that is sheathed on organic light-emitting units;
Epoxy resin Photocurable adhesive is coated on glass substrate, on glass substrate, forms the second square circle that is sheathed on the first square circle periphery;
Be that the magnesium chloride nano particle of 200 nanometers and particle diameter are that calcium chloride nano particle and the siloxanes Photocurable adhesive of 200 nanometers carries out ultrasonic second mixture that is mixed to get by particle diameter, this second mixture is coated on glass substrate, on glass substrate, forms the 3rd square circle that is sheathed on the second square circle periphery;
Epoxy resin Photocurable adhesive is coated on glass substrate, on glass substrate, forms the 4th square circle that is sheathed on the 3rd square circle periphery;
Using metal cover board as encapsulation cover plate, encapsulation cover plate is positioned on glass substrate, and enclose with the first square, the second square circle, the 3rd square and the 4th square circle contact, under UV lamp, irradiate, the first square circle solidify to form the first sealing ring that is sheathed on organic light-emitting units, the second square circle solidify to form the second sealing ring that is sheathed on the first sealing ring periphery, the 3rd square circle solidify to form the 3rd sealing ring that is sheathed on the second sealing ring periphery, the 4th square circle solidify to form the 4th sealing ring that is sheathed on the 3rd sealing ring periphery, two relative sides of the first sealing ring are affixed with glass substrate and encapsulation cover plate respectively, two relative sides of the second sealing ring are affixed with glass substrate and encapsulation cover plate respectively, two relative sides of the 3rd sealing ring are affixed with glass substrate and encapsulation cover plate respectively, two relative sides of the 4th sealing ring are affixed with glass substrate and encapsulation cover plate respectively, thereby encapsulation obtains organic electroluminescence device,
In this organic electroluminescence device, the geometric center of the geometric center of the first sealing ring, the geometric center of the second sealing ring, the 3rd sealing ring and the geometric center of the 4th sealing ring overlap, the width of the first sealing ring is 3 millimeters, particle diameter is that the magnesium chloride nano particle of 200 nanometers and particle diameter are that the mass percent that the quality sum of the calcium chloride nano particle of 200 nanometers accounts for the first sealing ring is 10%, and the mass ratio of this magnesium chloride nano particle and calcium chloride nano particle is 1:1; The spacing of the second sealing ring and the first sealing ring is 5 millimeters, and the width of the second sealing ring is 6 millimeters; The width of the 3rd sealing ring is 3 millimeters, particle diameter is that the magnesium chloride nano particle of 200 nanometers and particle diameter are that the mass percent that the quality sum of the calcium chloride nano particle of 200 nanometers accounts for the 3rd sealing ring is 10%, and the mass ratio of this magnesium chloride nano particle and calcium chloride nano particle is 1:1; The spacing of the 3rd sealing ring and the second sealing ring is 5 millimeters; The spacing of the 4th sealing ring and the 3rd sealing ring is 5 millimeters, and the width of the 4th sealing ring is 3 millimeters.
Comparative example 1
After clean cleaning glass substrate and dry, adopt vacuum evaporation on glass substrate, to form successively anode, hole transmission layer, luminescent layer, electron injecting layer and negative electrode, anode, hole transmission layer, luminescent layer, electron injecting layer and negative electrode stack gradually and form the organic light-emitting units being laminated on glass substrate, organic light-emitting units is arranged at the middle part of glass substrate, and the part surface of cover glass substrate; Wherein, anode is formed by indium tin oxide, and the thickness of anode is 100 nanometers; Hole transmission layer is by N, N'-diphenyl-N, and N'-bis-(1-naphthyl)-1,1'-biphenyl-4,4'-diamines forms, and the thickness of hole transmission layer is 50 nanometers; Luminescent layer is formed by (oxine)-aluminium, and the thickness of luminescent layer is 30 nanometers; Electron injecting layer is formed by lithium fluoride, and the thickness of electron injecting layer is 1 nanometer; Negative electrode is formed by argent, and the thickness of negative electrode is 100 nanometers;
Propenoic acid ester photocureable adhesive is coated on glass substrate, on glass substrate, forms the square circle that is sheathed on organic light-emitting units;
Using metal cover board as encapsulation cover plate, encapsulation cover plate is positioned on glass substrate, and contact with square circle, under UV lamp, irradiate, square circle solidify to form the sealing ring that is sheathed on organic light-emitting units, two relative sides of sealing ring are affixed with glass substrate and encapsulation cover plate respectively, and encapsulation obtains organic electroluminescence device; Wherein, the width of sealing ring is 10 millimeters.
Table 1 is that the organic electroluminescence device of embodiment 1～3 and comparative example 1 is 1000cd/m in initial brightness
2under, brightness decay to original intensity 70% time useful life.
The useful life of the organic electroluminescence device of table 1 embodiment 1～3 and comparative example 1
Can be found out by upper table 1, compared with the organic electroluminescence device of comparative example 1, improve respectively 59%, 50% and 81% the useful life of the organic electroluminescence device of embodiment 1～3, illustrate that the sealing effectiveness simultaneously encapsulating with the first sealing ring, the second sealing ring, the 3rd sealing ring and the 4th sealing ring is better, the useful life of greatly improving organic electroluminescence device.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an organic electroluminescence device, comprise substrate, organic light-emitting units and encapsulation cover plate, described encapsulation cover plate and described substrate interval arrange, described organic light-emitting units is arranged at described substrate and between described substrate and described encapsulation cover plate, it is characterized in that, also comprise the first sealing ring, the second sealing ring, the 3rd sealing ring and the 4th sealing ring, described organic light-emitting units covers the part surface of described substrate, described the first sealing ring be arranged on described substrate and be sheathed on described organic light-emitting units and two relative sides of described the first sealing ring affixed with described substrate and described encapsulation cover plate respectively, described the second sealing ring is arranged on described substrate and to be sheathed on two relative sides of described the first sealing ring and described the second sealing ring affixed with described substrate and described encapsulation cover plate respectively, described the 3rd sealing ring is arranged on described substrate and to be sheathed on two relative sides of described the second sealing ring and described the 3rd sealing ring affixed with described substrate and described encapsulation cover plate respectively, described the 4th sealing ring is arranged on described substrate and to be sheathed on two relative sides of described the 3rd sealing ring and described the 4th sealing ring affixed with described substrate and described encapsulation cover plate respectively, wherein, described the first sealing ring is made up of the first Photocurable adhesive and the first water absorbing agent, described the second sealing ring is made up of the second Photocurable adhesive, and described the 3rd sealing ring is made up of the 3rd Photocurable adhesive and the second water absorbing agent, and described the 4th sealing ring is made up of the 4th Photocurable adhesive.
2. organic electroluminescence device according to claim 1, is characterized in that, the width of described the first sealing ring is 1 millimeter～5 millimeters.
3. organic electroluminescence device according to claim 1, is characterized in that, the width of described the second sealing ring is 1 millimeter～5 millimeters.
4. organic electroluminescence device according to claim 1, is characterized in that, the width of described the 3rd sealing ring is 1 millimeter～5 millimeters.
5. organic electroluminescence device according to claim 1, is characterized in that, the width of described the 4th sealing ring is 5 millimeters～10 millimeters.
6. organic electroluminescence device according to claim 1, it is characterized in that, the spacing of spacing, the second sealing ring and the 3rd sealing ring of described the first sealing ring and the second sealing ring and the spacing of the 3rd sealing ring and the 4th sealing ring are 2 millimeters～10 millimeters.
7. organic electroluminescence device according to claim 1, it is characterized in that, described the first Photocurable adhesive, the second Photocurable adhesive, the 3rd Photocurable adhesive and the 4th Photocurable adhesive are epobond epoxyn, acrylic ester adhesive or type siloxane Photocurable adhesive.
8. organic electroluminescence device according to claim 1, is characterized in that, described the first water absorbing agent and the second water absorbing agent are selected from least one in titanium dioxide, zirconia, calcium oxide, strontium oxide strontia, barium monoxide, calcium chloride and magnesium chloride.
9. organic electroluminescence device according to claim 8, is characterized in that, described titanium dioxide, zirconia, calcium oxide, strontium oxide strontia, barium monoxide, calcium chloride and magnesium chloride are that particle diameter is the nano particle of 100 nanometer～250 nanometers.
10. organic electroluminescence device according to claim 1, is characterized in that, the mass percent that described the first water absorbing agent accounts for described the first sealing ring is 1～30%; The mass percent that described the second absorbent accounts for described the 3rd sealing ring is 1～30%.
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