CN105742509B - A kind of OLED for improving light extraction efficiency - Google Patents
A kind of OLED for improving light extraction efficiency Download PDFInfo
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- CN105742509B CN105742509B CN201410744200.8A CN201410744200A CN105742509B CN 105742509 B CN105742509 B CN 105742509B CN 201410744200 A CN201410744200 A CN 201410744200A CN 105742509 B CN105742509 B CN 105742509B
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- light extraction
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Abstract
The present invention provides a kind of OLED for improving light extraction efficiency, including：Glass substrate, the first electrode layer in glass substrate, the organic layer in first electrode layer and the second electrode lay on organic layer, the OLED is packaged using encapsulation cover plate, transparent liquid drier is filled between the OLED after encapsulation and encapsulation cover plate, and scattering particles is adulterated in the transparent liquid drier.The OLED provided by the invention for improving light extraction efficiency, using the means that scattering particles is adulterated in transparent liquid drier, the light extraction efficiency for pushing up luminous or dual emission device can be improved.
Description
Technical field
The present invention relates to a kind of OLED, and in particular to a kind of OLED for improving light extraction efficiency.
Background technology
Organic electroluminescent（OLED）The light of device takes out（Light extraction, or light extraction）Directly affect it
Overall performance.It is reported that claiming, actual only about 20% light beam of organic electroluminescence device is issued in air, about 80% light beam
It can be lost, wherein, it there are about 30% light beam and be limited in device and can not send.At present, it is general all logical in the emitting OLED-device of bottom
Cross removing layer and outer removing layer in addition and take out ratio to increase light, but for top-illuminating OLED device, interior taking-up work
Skill is more difficult, existing method such as Application No. 201220669875.7, the applying date on December 7th, 2012 " one kind top is luminous
The encapsulation cover plate of organic electroluminescence device ", using being connected with base plate seals, encapsulation cover plate is formed the patent with the substrate
Containment device in confined space, the inner surface of the encapsulation cover plate form at least one layer of anti-reflection film.But the method simply takes
Part is gone out by cap the light that loses, the amplitude that light takes out is extremely limited, can not fundamentally take out device inside institute
The light of loss.
The content of the invention
For problems of the prior art, the present invention provides a kind of OLED for improving light extraction efficiency, can
Improve the light extraction efficiency for the OLED for pushing up luminous or double-side.
A kind of OLED for improving light extraction efficiency of present invention offer, a kind of OLED for improving light extraction efficiency,
Including：Glass substrate, the first electrode layer in glass substrate, the organic layer in first electrode layer and positioned at having
The second electrode lay on machine layer, the OLED are packaged using encapsulation cover plate, it is characterised in that the OLED after encapsulation
Transparent liquid drier is filled between device and encapsulation cover plate, and doped with scattering particles in the transparent liquid drier.
Further, doping mass percent of the scattering particles in transparent liquid drier is 5%~70%, described
The grain size of scattering particles is 5nm~800nm.
Further, doping mass percent of the scattering particles in transparent liquid drier is 10%~50%；Institute
The grain size for stating scattering particles is 25nm~450nm.
Further, the scattering particles is TiO2Particle, ZrO2Particle, SiO2In particle, SiO particles, TiO particles
A kind of mixture more than or two of which formed.
Further, the refractive index of the transparent liquid drier is more than or equal to 1.
Further, the refractive index of the transparent liquid drier is more than or equal to 1.5.
Further, dispersant is also contained in the transparent liquid drier, the dispersant is in transparent liquid drier
It is less than or equal to 10% with the mass percent in scattering particles.
Further, subsequent cure processing is carried out after the completion of the transparent liquid drier filling of the OLED, so that
Turn into solid doped with the state of the transparent liquid drier of scattering particles.
Further, it is packaged during the OLED encapsulation between glass cover-plate and glass substrate using packaging plastic,
The glass cover-plate is provided with groove towards the surface of the second electrode lay.
Further, the OLED is the OLED of top-illuminating OLED device or double-side.
Present invention has the advantage that：
The present invention provides a kind of top-illuminating OLED device for improving light extraction efficiency, OLED and encapsulation after encapsulation
Transparent liquid drier is filled between cover plate, and scattering particles is adulterated in the transparent liquid drier, the present invention is using saturating
The means of scattering particles are adulterated in bright liquid desiccant, the light extraction efficiency for pushing up luminous or dual emission device can be improved,
Meanwhile with the characteristic of isolation water oxygen well, extend device lifetime.
Brief description of the drawings
Fig. 1：A kind of structural representation of top-illuminating OLED device for improving light extraction efficiency provided by the invention.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art can be with
It is better understood from the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
The present invention provides a kind of OLED for improving light extraction efficiency, as shown in figure 1, including：Glass substrate 1；It is located at
First electrode layer 2 in glass substrate 1；Organic layer 4 in first electrode layer 2, the organic layer 4 can be individual layer or folded
Layer；And the transparent the second electrode lay 3 on organic layer 4.Difference with the prior art of the present invention is, by said structure
The OLED of composition is packaged, and transparent liquid drier 6 is filled up completely between encapsulation cover plate 7 and OLED, i.e.,
Transparent liquid drier 6 is filled between the encapsulation cover plate 7 and the second electrode lay 3, first electrode layer 2, as shown in Figure 1.In
Scattering particles is adulterated in the transparent liquid drier 6, the grain size of the doping scattering particles is 5 nm~800nm, is entered
One step is preferably 25nm~450nm, and the doping mass percentage concentration of the scattering particles is 5%~70%, more preferably 10%
~50%.The doping scattering particles is the particle that refractive index is more than or equal to 1.8, is specifically as follows TiO2Particle, ZrO2Particle,
SiO2Particle, SiO particles, the mixture of one kind in TiO particles or two of which composition described above, by two of which above group
Into mixture when, the mutual mass ratio fraction of wherein various composition is not limited, arbitrary proportion, it is only necessary to overall
Meet chi footpath and the doping concentration requirement of scattering particles.The scattering particles is preferably TiO2Particle.Wherein transparent liquid
The refractive index of drier is n >=1, refractive index n >=1.5 of preferably clear liquid desiccant.The transparent liquid drier can be with
Select the models such as OleDry-F, OleDry-F2, OleDry-F3, OleDry-S or OleDry-P of Futaba companies.
The refractive index of the organic layer 4 of OLED is generally 1.7-1.8, therefore organic layer 4 is powered in top illuminating device
The light sent enters encapsulation cover plate 7 and OLED（The second electrode lay 3）Between space when, because total reflection principle can make greatly
Partial light is confined in organic layer 4, and this causes OLED light extraction efficiency to substantially reduce.The present invention is using in transparent liquid
The mode of doping scattering particles reduces light and is emitted from organic layer 4 in total reflection caused by interface in state drier, and leads to
Scattering particles therein is crossed to change the light direction of propagation, allows light by multiple reflections so as to launch, is improved
The light extraction efficiency of OLED.
It is packaged during the OLED encapsulation between glass cover-plate 7 and glass substrate 1 using packaging plastic 5, wherein for
Liquid desiccant is filled up completely with, on the surface of glass cover-plate 7 towards the second electrode lay 3 of encapsulation sets groove 8, it is preferable that
The intersection of the glass cover-plate 7 and packaging plastic 5 offers liquid desiccant after two grooves 8 allow encapsulation and filled out completely
Fill inside the OLED after encapsulation.Liquid clear drier 6 is first dripped on encapsulation cover plate 7, and the effect of groove 8 is to make encapsulation
Cover plate 7 can carry more transparent liquid drier 6, then press and encapsulate with the encapsulation cover plate 7 being deposited, in groove 8
Transparent liquid drier 6 will come out, and be filled up completely with transparent liquid drier 6.After transparent liquid drier 6 has been filled,
Subsequent cure processing can be carried out to the OLED, is such as toasted, the temperature of baking is about 75 DEG C~150 DEG C, and the time is
10min~60min, or such as ultraviolet light, irradiation time is 5min-60min, or makes its vacuum by vacuumizing
Solidification, so that the state of the transparent liquid drier 6 inside OLED turns into solid.
In order that scattering particles being scattered in transparent liquid drier evenly in the transparent liquid drier of the present invention,
A certain amount of dispersant is mixed wherein, and the accounting in the mixture that liquid clear drier and scattering particles combine is less than or equal to
10%（Percetage by weight）.The titanium white dispersant is used to disperse the scattering particles, and the dispersant can dissipate for divided titanium dioxide
Agent, for example, can select Byk Chemie GmbH produce afcma-4010, disperbyk-110, disperbyk-180,
The models such as disperbyk-163, dispers655 or dispers628.
A kind of OLED for improving light extraction efficiency provided by the invention, it is luminous or double-side suitable for pushing up
OLED, not only make device that there is isolation water oxygen ability well, strengthen device stability, extend device lifetime, while energy
Enough increase substantially the light extraction efficiency for the OLED for pushing up luminous or double-side.Meanwhile OLED devices provided by the invention
The method that part improves light extraction efficiency is taking-up technology in one kind, can be with being taken in the prior art to improve the outer of light extraction efficiency
Go out technology combined use.The outer taking-up technology can use and lens jacket or scattering layer are added on the appearance surface glass of device
Etc. existing implementation.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
Enclose not limited to this.The equivalent substitute or conversion that those skilled in the art are made on the basis of the present invention, in the present invention
Protection domain within.Protection scope of the present invention is defined by claims.
Claims (9)
1. a kind of OLED for improving light extraction efficiency, including：Glass substrate, the first electrode layer in glass substrate,
Organic layer in first electrode layer and the second electrode lay on organic layer, the OLED use cap
Plate is packaged, it is characterised in that transparent liquid drier is filled between the OLED after encapsulation and encapsulation cover plate, and
Doped with scattering particles in the transparent liquid drier, adopted when the OLED encapsulates between encapsulation cover plate and glass substrate
It is packaged with packaging plastic, the encapsulation cover plate is provided with groove towards the surface of the second electrode lay, and the groove is opened in described
The intersection of encapsulation cover plate and the packaging plastic.
2. the OLED according to claim 1 for improving light extraction efficiency, it is characterised in that the scattering particles is in saturating
Doping mass percent in bright liquid desiccant is 5%~70%, and the grain size of the scattering particles is 5nm~800nm.
3. the OLED according to claim 2 for improving light extraction efficiency, it is characterised in that the scattering particles is in saturating
Doping mass percent in bright liquid desiccant is 10%~50%；The grain size of the scattering particles is 25nm~450nm.
4. the OLED according to claim 2 for improving light extraction efficiency, it is characterised in that the scattering particles is
TiO2Particle, ZrO2Particle, SiO2Particle, SiO particles, the mixture more than one kind or two of which in TiO particles formed.
5. the OLED according to claim 1 for improving light extraction efficiency, it is characterised in that the transparent liquid is dried
The refractive index of agent is more than or equal to 1.
6. the OLED according to claim 5 for improving light extraction efficiency, it is characterised in that the transparent liquid is dried
The refractive index of agent is more than or equal to 1.5.
7. the OLED according to claim 1 for improving light extraction efficiency, it is characterised in that the transparent liquid is dried
Also contain dispersant in agent, mass percent of the dispersant in transparent liquid drier and scattering particles is less than or equal to
10%。
8. it is according to claim 1 improve light extraction efficiency OLED, it is characterised in that the OLED it is saturating
Subsequent cure processing is carried out after the completion of bright liquid desiccant filling, so that the shape of the transparent liquid drier doped with scattering particles
State turns into solid.
9. the OLED as claimed in any of claims 1 to 8 for improving light extraction efficiency, it is characterised in that institute
State OLED of the OLED for top-illuminating OLED device or double-side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410744200.8A CN105742509B (en) | 2014-12-09 | 2014-12-09 | A kind of OLED for improving light extraction efficiency |
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| CN201410744200.8A CN105742509B (en) | 2014-12-09 | 2014-12-09 | A kind of OLED for improving light extraction efficiency |
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| CN105742509A CN105742509A (en) | 2016-07-06 |
| CN105742509B true CN105742509B (en) | 2017-12-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106784383A (en) * | 2017-01-05 | 2017-05-31 | 南京第壹有机光电有限公司 | The OLED encapsulated with the cover plate for having Back Word connected in star |
| CN109427849A (en) * | 2017-08-31 | 2019-03-05 | 上海和辉光电有限公司 | A kind of AMOLED display screen |
| CN107845736A (en) * | 2017-10-27 | 2018-03-27 | 深圳市华星光电技术有限公司 | OLED display device and preparation method |
| CN108987602B (en) * | 2017-12-13 | 2020-07-10 | 广东聚华印刷显示技术有限公司 | Packaging structure of organic electroluminescent device and manufacturing method |
| CN110767818A (en) * | 2018-07-26 | 2020-02-07 | Oppo广东移动通信有限公司 | OLED screen, manufacturing method thereof and electronic device |
| CN110265566A (en) * | 2019-06-04 | 2019-09-20 | 深圳市华星光电技术有限公司 | Display panel and preparation method thereof |
| CN114023799A (en) * | 2021-10-29 | 2022-02-08 | 深圳市华星光电半导体显示技术有限公司 | Display panel, manufacturing method of display panel and display device |
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| US7276848B2 (en) * | 2005-03-29 | 2007-10-02 | Eastman Kodak Company | OLED device having improved light output |
| TW201414773A (en) * | 2012-10-02 | 2014-04-16 | Wintek Corp | Organic light-emitting diode package structure |
| JP6124577B2 (en) * | 2012-12-12 | 2017-05-10 | 株式会社半導体エネルギー研究所 | Light emitting device and manufacturing method thereof |
| JP2014132525A (en) * | 2013-01-04 | 2014-07-17 | Japan Display Inc | Organic EL display device |
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Effective date of registration: 20181212 Address after: 065700 Lanyuan S3 Building, Peacock City, Bazhou, Langfang City, Hebei Province Patentee after: Bazhou Yungu Electronic Technology Co. Ltd. Address before: 100085 First Floor of Huanyang Building, No. 1 Shangdi East Road, Haidian District, Beijing Patentee before: Weixinnuo Science and Technology Co., Ltd., Beijing |
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Application publication date: 20160706 Assignee: Yungu (Gu'an) Technology Co., Ltd.|Kunshan Guoxian photoelectric Co., Ltd.|Kunshan Institute of technology new flat panel display technology center Co., Ltd Assignor: Bazhou Yungu Electronic Technology Co. Ltd. Contract record no.: X2019990000154 Denomination of invention: OLED device capable of improving light extraction efficiency Granted publication date: 20171219 License type: Common License Record date: 20191030 |
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