CN104064681A - Organic electroluminescent device - Google Patents
Organic electroluminescent device Download PDFInfo
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- CN104064681A CN104064681A CN201310092183.XA CN201310092183A CN104064681A CN 104064681 A CN104064681 A CN 104064681A CN 201310092183 A CN201310092183 A CN 201310092183A CN 104064681 A CN104064681 A CN 104064681A
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- sealing ring
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- electroluminescence device
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- 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
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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
- H10K50/846—Passivation; Containers; Encapsulations comprising getter material or desiccants
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- 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, a first sealing ring and a second sealing ring. 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, the organic luminescence unit covers a part of the surface of the substrate, the first sealing ring is arranged on the substrate and sleeves the organic luminescence unit, two opposite side surfaces of the first sealing ring are respectively fixedly connected with the substrate and the packaging cover plate, the second sealing ring is arranged on the substrate and sleeves the first sealing ring, two opposite side surfaces of the second sealing ring are respectively fixedly connected with the substrate and the packaging cover plate, the first sealing ring is composed of a first light-cured adhesive, a water absorbing agent and a getter, and the second sealing ring is composed of a second light-cured adhesive. The service life of the organic electroluminescent 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 cap, also comprise the first sealing ring and the second 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, wherein, described the first sealing ring is made up of the first Photocurable adhesive, water absorbing agent and getter, described the second sealing ring is made up of the second Photocurable adhesive.
In an embodiment, the width of described the first sealing ring is 5～10 millimeters therein.
In an embodiment, the width of described the second sealing ring is 2～10 millimeters therein.
In an embodiment, the spacing of described the first sealing ring and the second sealing ring is 3 millimeters～7 millimeters therein.
In an embodiment, described the first Photocurable adhesive and the second Photocurable adhesive are epobond epoxyn, acrylic ester adhesive or type siloxane Photocurable adhesive therein.
In an embodiment, described water absorbing agent is titanium dioxide, zirconia, calcium oxide, strontium oxide strontia, barium monoxide, calcium chloride or magnesium chloride therein.
In an embodiment, described getter is barium aluminium getter, barium azide getter or germanium nitride getter therein.
In an embodiment, the mass ratio of described water absorbing agent and getter is 1:0.2～5 therein.
In an embodiment, the mass percent that the quality sum of described water absorbing agent and getter accounts for described the first sealing ring is 5～30% therein.
In an embodiment, described encapsulation cover plate is glass cover-plate or metal cover board therein.
The encapsulation cover plate of above-mentioned organic electroluminescence device is arranged on substrate by the first sealing ring and the second sealing ring and forms airtight host cavity with substrate, the first sealing ring and the second sealing ring play cementation and encapsulation cover plate are closely bonded on substrate, the second sealing ring can once stop water and the oxygen to host cavity internal penetration, the first sealing ring can stop water and the oxygen to host cavity diffusion inside by secondary, and can be to infiltrate the water of the first sealing ring inside and oxygen absorbs and avoid water and oxygen to spread in host cavity, thereby water and oxygen osmotic effect are reduced, can effectively protect the organic light-emitting units in host cavity, make the useful life of 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 and encapsulation cover plate 50.Substrate 10 arranges with encapsulation cover plate 50 intervals, and organic light-emitting units 20 is arranged on substrate 10 and between substrate 10 and encapsulation cover plate 50.
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.
Please refer to Fig. 2, in present embodiment, the first sealing ring 30 is square circle.The first sealing ring 30 is arranged on substrate 10, and is sheathed on organic light-emitting units 20.
Side S1 and the encapsulation cover plate 50 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, water absorbing agent and getter, so that the first sealing ring 30 has adhesive property, water absorbing properties and the performance of cooling down simultaneously.
Preferably, the first Photocurable adhesive is epobond epoxyn, acrylic ester adhesive or type siloxane Photocurable adhesive.
Water absorbing agent is titanium dioxide (TiO
2), zirconia (ZrO), calcium oxide (CaO), strontium oxide strontia (SrO), barium monoxide (BaO), calcium chloride (CaCl
2) or magnesium chloride (MgCl
2).
Getter is barium aluminium getter (BaAl
4), barium azide getter (Ba (N
3)
2) or germanium nitride getter (Ge
3n
4).
Preferably, the mass ratio of water absorbing agent and getter is 1:0.2～5.
Preferably, the mass percent that the quality sum of water absorbing agent and getter accounts for the first sealing ring 30 is 5～30%, to ensure that the first sealing ring 30 has higher adhesion strength, higher water absorbing properties and the performance of cooling down.
Preferably, 5～10 millimeters of the width of the first sealing ring 30, so that the first sealing ring 30 can be realized the effect that reduces largely the infiltration of water oxygen.Width is that 5～10 millimeters of live widths that refer to each limit of the first sealing ring 30 are 5～10 millimeters, 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 5～10 millimeters.
Side S2 and the encapsulation cover plate 50 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 2～10 millimeters.
The spacing of the second sealing ring 40 and the first sealing ring 30 is preferably 3～7 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.
The second sealing ring 40 of above-mentioned indication and the spacing of the first sealing ring 30 refer to the geometric center of the second sealing ring 40 and the first sealing ring 30 as a bit, make a straight line crossing with the first sealing ring 30 and the second close circle 40 towards any direction, 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, away from the first intersection point of organic light-emitting units 20 with near the distance between the second intersection point of organic light-emitting units 20.
Encapsulation cover plate 50 is metal cover board or glass cover-plate.Metal cover board and glass cover-plate all have good barrier property.
Two relative sides of the first sealing ring 30 are affixed with substrate 10 and encapsulation cover plate 50 respectively, two relative sides of the second sealing ring 40 are affixed with substrate 10 and encapsulation cover plate 50 respectively, by the cementation of the first sealing ring 30 and the second sealing ring 40, encapsulation cover plate 50 is arranged on substrate 10, and forming airtight host cavity 60 with substrate 10, organic light-emitting units 20 is contained in host cavity 60.
The organic light-emitting units 20 of above-mentioned organic electroluminescence device 100 is contained in by substrate 10, the first sealing ring 30, in the airtight host cavity 60 that the second sealing ring 40 and encapsulation cover plate 50 surround, substrate 10 and encapsulation cover plate 50 all have good barrier property, the second sealing ring 40 can once stop to water and the oxygen of host cavity 60 internal penetrations, the first sealing ring 30 can stop to hydrone and the oxygen molecule of host cavity 60 diffusion inside by secondary, and can be to infiltrating the hydrone of the first sealing ring 30 inside and oxygen molecule absorbs and avoid hydrone and oxygen molecule to the interior diffusion of host cavity 60, thereby reduce water oxygen osmotic effect, can effectively protect the organic light-emitting units 20 in host cavity 60, make the useful life of organic electroluminescence device 100 longer.
It is below specific embodiment.
Embodiment 1
After clean cleaning glass substrate and dry, adopt vacuum thermal evaporation technique 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;
Barium monoxide, barium aluminium getter and propenoic acid ester photocureable adhesive are mixed to get to mixture, this mixture is coated on glass substrate, on glass substrate, form 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;
Using metal cover board as encapsulation cover plate, encapsulation cover plate is positioned on glass substrate, and contact with the first square circle and the second square circle, 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, 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, thereby encapsulation obtains organic electroluminescence device; Wherein, the geometric center of the geometric center of the first sealing ring and the second sealing ring overlaps, and the width of the first sealing ring is 10 millimeters, and the mass ratio of barium monoxide and barium aluminium getter is 1:0.2; The mass percent that the quality sum of barium monoxide and barium aluminium getter accounts for the first sealing ring is 5%; The spacing of the second sealing ring and the first sealing ring is 3 millimeters, and the width of the second sealing ring is 2 millimeters.
Embodiment 2
After clean cleaning glass substrate and dry, adopt vacuum thermal evaporation technique 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;
Calcium oxide, barium azide getter and epoxy resin Photocurable adhesive are mixed to get to mixture, this mixture is coated on glass substrate, on glass substrate, form 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;
Using metal cover board as encapsulation cover plate, encapsulation cover plate is positioned on glass substrate, and contact with the first square circle and the second square circle, 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, 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, thereby encapsulation obtains organic electroluminescence device; Wherein, the geometric center of the geometric center of the first sealing ring and the second sealing ring overlaps, and the width of the first sealing ring is 5 millimeters, and the mass ratio of calcium oxide and barium azide getter is 1:5; The mass percent that the quality sum of calcium oxide and barium azide getter accounts for the first sealing ring is 30%; The spacing of the second sealing ring and the first sealing ring is 7 millimeters, and the width of the second sealing ring is 10 millimeters.
Embodiment 3
After clean cleaning glass substrate and dry, adopt vacuum thermal evaporation technique 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;
Calcium chloride, germanium nitride getter and siloxanes Photocurable adhesive are mixed to get to mixture, this mixture is coated on glass substrate, on glass substrate, form the first square circle that is sheathed on organic light-emitting units;
Siloxanes Photocurable adhesive is coated on glass substrate, on glass substrate, forms the second square circle that is sheathed on the first square circle;
Using metal cover board as encapsulation cover plate, encapsulation cover plate is positioned on glass substrate, and contact with the first square circle and the second square circle, 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, 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, thereby encapsulation obtains organic electroluminescence device; Wherein, the geometric center of the geometric center of the first sealing ring and the second sealing ring overlaps, and the width of the first sealing ring is 8 millimeters, and the mass ratio of calcium chloride and germanium nitride getter is 1:1; The mass percent that the quality sum of calcium chloride and germanium nitride getter accounts for the first sealing ring is 20%; The spacing of the second sealing ring and the first sealing ring is 5 millimeters, and the width of the second sealing ring is 8 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 2 millimeters.
Comparative example 2
After clean cleaning glass substrate and dry, adopt vacuum thermal evaporation technique 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;
Barium monoxide and propenoic acid ester photocureable adhesive are mixed to get to mixture, this mixture is coated on glass substrate, on glass substrate, form 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;
Using metal cover board as encapsulation cover plate, encapsulation cover plate is positioned on glass substrate, and contact with the first square circle and the second square circle, 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, 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, thereby encapsulation obtains organic electroluminescence device; Wherein, the geometric center of the geometric center of the first sealing ring and the second sealing ring overlaps, and the width of the first sealing ring is 10 millimeters, and the mass percent that barium monoxide accounts for the first sealing ring is 5%; The spacing of the second sealing ring and the first sealing ring is 3 millimeters, and the width of the second sealing ring is 2 millimeters.
Comparative example 3
After clean cleaning glass substrate and dry, adopt vacuum thermal evaporation technique 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;
Barium aluminium getter and propenoic acid ester photocureable adhesive are mixed to get to mixture, this mixture is coated on glass substrate, on glass substrate, form 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;
Using metal cover board as encapsulation cover plate, encapsulation cover plate is positioned on glass substrate, and contact with the first square circle and the second square circle, 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, 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, thereby encapsulation obtains organic electroluminescence device; Wherein, the geometric center of the geometric center of the first sealing ring and the second sealing ring overlaps, and the width of the first sealing ring is 10 millimeters, and the mass percent that barium aluminium getter accounts for the first sealing ring is 5%; The spacing of the second sealing ring and the first sealing ring is 3 millimeters, and the width of the second sealing ring is 2 millimeters.
Table 1 is that the organic electroluminescence device of embodiment 1～3 and comparative example 1～3 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 1～3
Can be found out by upper table 1, compared with the organic electroluminescence device of comparative example 1, improve respectively 65%, 69% and 54% the useful life of the organic electroluminescence device of embodiment 1～3; Compared with comparative example 2, improve respectively 30%, 33% and 21% the useful life of the organic electroluminescence device of embodiment 1～3; Compared with comparative example 3, improve respectively 43%, 47% and 33% the useful life of the organic electroluminescence device of embodiment 1～3.Illustrate that the first sealing ring of embodiment 1～3 and the sealing effectiveness of the second sealing ring are better, the life-span that is conducive to improve 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 on described substrate and between described substrate and described cap, it is characterized in that, also comprise the first sealing ring and the second 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, wherein, described the first sealing ring is made up of the first Photocurable adhesive, water absorbing agent and getter, described the second sealing ring is made up of the second Photocurable adhesive.
2. organic electroluminescence device according to claim 1, is characterized in that, the width of described the first sealing ring is 5～10 millimeters.
3. organic electroluminescence device according to claim 1, is characterized in that, the width of described the second sealing ring is 2～10 millimeters.
4. organic electroluminescence device according to claim 1, is characterized in that, the spacing of described the first sealing ring and the second sealing ring is 3 millimeters～7 millimeters.
5. organic electroluminescence device according to claim 1, is characterized in that, described the first Photocurable adhesive and the second Photocurable adhesive are epobond epoxyn, acrylic ester adhesive or type siloxane Photocurable adhesive.
6. organic electroluminescence device according to claim 1, is characterized in that, described water absorbing agent is titanium dioxide, zirconia, calcium oxide, strontium oxide strontia, barium monoxide, calcium chloride or magnesium chloride.
7. organic electroluminescence device according to claim 1, is characterized in that, described getter is barium aluminium getter, barium azide getter or germanium nitride getter.
8. organic electroluminescence device according to claim 1, is characterized in that, the mass ratio of described water absorbing agent and getter is 1:0.2～5.
9. organic electroluminescence device according to claim 1, is characterized in that, the mass percent that the quality sum of described water absorbing agent and getter accounts for described the first sealing ring is 5～30%.
10. organic electroluminescence device according to claim 1, is characterized in that, described encapsulation cover plate is glass cover-plate or metal cover board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310092183.XA CN104064681A (en) | 2013-03-21 | 2013-03-21 | Organic electroluminescent device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310092183.XA CN104064681A (en) | 2013-03-21 | 2013-03-21 | Organic electroluminescent device |
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| Publication Number | Publication Date |
|---|---|
| CN104064681A true CN104064681A (en) | 2014-09-24 |
Family
ID=51552304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310092183.XA Pending CN104064681A (en) | 2013-03-21 | 2013-03-21 | Organic electroluminescent device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110931651A (en) * | 2019-11-22 | 2020-03-27 | 深圳市华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
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| CN202067839U (en) * | 2010-12-16 | 2011-12-07 | 陕西科技大学 | OLED (organic light emitting diode) glass packaging device |
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| EP1383182A2 (en) * | 2002-07-17 | 2004-01-21 | SAES GETTERS S.p.A. | System for applying a gas sorbing device on a surface and processes for the production thereof |
| CN1678639A (en) * | 2002-07-24 | 2005-10-05 | 粘合剂研究公司 | Transformable pressure sensitive adhesive tape and use thereof in display screens |
| CN1806348A (en) * | 2003-06-16 | 2006-07-19 | 皇家飞利浦电子股份有限公司 | Double seal with getter in flexible organic displays |
| CN202067839U (en) * | 2010-12-16 | 2011-12-07 | 陕西科技大学 | OLED (organic light emitting diode) glass packaging device |
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| CN110931651A (en) * | 2019-11-22 | 2020-03-27 | 深圳市华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
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Application publication date: 20140924 |