CN106654051B - A kind of OLED and OLED luminaire taking out structure with light - Google Patents
A kind of OLED and OLED luminaire taking out structure with light Download PDFInfo
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- CN106654051B CN106654051B CN201710123528.1A CN201710123528A CN106654051B CN 106654051 B CN106654051 B CN 106654051B CN 201710123528 A CN201710123528 A CN 201710123528A CN 106654051 B CN106654051 B CN 106654051B
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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
- H10K50/85—Arrangements for extracting light from the devices
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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
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/854—Arrangements for extracting light from the devices comprising scattering means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The embodiment of the present invention provides a kind of OLED and OLED luminaire that structure is taken out with light, this is applied to OLED with the OLED that light takes out structure, including metal electrode layer, it is set to the luminescent layer of metal electrode side, it is set to transparent electrode layer of the luminescent layer far from the metal electrode layer side, and is set to substrate of the transparent electrode layer far from the luminescent layer side.Wherein, substrate is provided with concaveconvex structure close to the side of transparent electrode layer, and the side far from transparent electrode layer is provided with outer scattering film layer, and the concaveconvex structure takes out for realizing the interior light of OLED, and the outer scattering film layer is taken out for realizing the outer light of OLED.The embodiment of the present invention can effectively improve light utilization efficiency, and avoid the problem that light is caused to project from the side of substrate due to total reflection etc..
Description
Technical field
The present invention relates to OLED technology fields, in particular to a kind of OLED and OLED lamp for taking out structure with light
Tool.
Background technique
Organic Light Emitting Diode (OLED, Organic Light-Emitting Diode), be by one layer it is thin and transparent and
Indium tin oxide (ITO) with characteristic of semiconductor, is connected with the anode of power supply, adds another metallic cathode, will be organic
Luminescent material is bundled into the structure such as sandwich.Through inventor the study found that existing OLED is in illumination, due to originals such as total reflections
Because causing the light being emitted from side more, and the light that side is projected concentrates on certain some wave band, so that the light ratio issued from front
Example is very low, and spectrum is not complete, and external quantum efficiency is very low.
Summary of the invention
In view of this, the present invention provides a kind of OLED and OLED luminaire for taking out structure with light, by setting on substrate
Concaveconvex structure and outer scattering film layer are set, the light being emitted due to total reflection etc. from side is effectively reduced, meanwhile, it effectively increases
Light extraction efficiency.
Present pre-ferred embodiments provide a kind of OLED that structure is taken out with light, comprising:
Metal electrode layer；
It is set to the luminescent layer of the metal electrode layer side；
It is set to transparent electrode layer of the luminescent layer far from the metal electrode layer side；And
It is set to substrate of the transparent electrode layer far from the luminescent layer side；
Wherein, the substrate is provided with concaveconvex structure close to the side of the transparent electrode layer, far from the transparent electrode
One survey of layer is provided with outer scattering film layer, and the concaveconvex structure takes out for realizing the interior light of the OLED, the outer scattering film
Layer takes out for realizing the outer light of the OLED.
In preferred embodiments of the present invention, above-mentioned outer scattering film layer is organic material layer.
In preferred embodiments of the present invention, the glass transition temperature of organic material layer is less than 110 DEG C.
In preferred embodiments of the present invention, it is described it is outer scattering film layer with a thickness of 50-500nm.
In preferred embodiments of the present invention, the outer scattering film layer is atomizing layer, and the mist degree range of the atomizing layer is
5%-30%.
In preferred embodiments of the present invention, the height of projection of the concaveconvex structure is greater than the overall thickness of OLED device, and
Less than the one third of the substrate overall thickness.
In preferred embodiments of the present invention, the distance between lug boss and recessed portion in the concaveconvex structure range are
4um-400um。
In preferred embodiments of the present invention, the roughness of the concaveconvex structure is less than 20nm.
In preferred embodiments of the present invention, the metal electrode, luminescent layer, at least one layer and institute in transparent electrode layer
Stating substrate has identical concaveconvex structure.
Present pre-ferred embodiments also provide a kind of OLED luminaire, and the OLED luminaire includes that above-mentioned taking out with light is tied
The OLED of structure.
Compared with prior art, the OLED and OLED luminaire provided by the invention that structure is taken out with light, by substrate
Concaveconvex structure is set close to the side of transparent electrode layer, and in the outer scattering film layer of light-emitting surface setting of substrate, can effectively be subtracted
Few light being emitted due to total reflection etc. from side, meanwhile, light extraction efficiency, and the configuration of the present invention is simple are effectively increased,
It is easily achieved.
Detailed description of the invention
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment only
It is a part of the embodiments of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings
The component of embodiment can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.In description of the invention
In, " first, second, third, fourth etc. is only used for distinguishing description term, and should not be understood as only or imply relative importance.
In the description of the present invention unless specifically defined or limited otherwise, term " setting ", " connected ", " connection " are answered
It is interpreted broadly, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The connection in portion.For the ordinary skill in the art, the tool of above-mentioned term in the present invention can be understood with concrete condition
Body meaning.
Fig. 1 is the structural schematic diagram of OLED that structure is taken out with light provided in an embodiment of the present invention a kind of.
Fig. 2 is another structural schematic diagram of OLED that structure is taken out with light provided in an embodiment of the present invention a kind of.
Fig. 3 is the cross section structure schematic diagram of substrate shown in Fig. 2.
Fig. 4 is another cross section structure schematic diagram of substrate shown in Fig. 2.
Icon: the OLED that there is 10- light to take out structure；110- metal electrode layer；120- luminescent layer；130- transparent electrode
Layer；140- substrate；142- concaveconvex structure；1422- lug boss；1424- recessed portion；Film layer is scattered outside 144-；1442- crystalline solid.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
Referring to Fig. 1, for a kind of structural representation for the OLED 10 for taking out structure with light provided in an embodiment of the present invention
Figure, it includes metal electrode layer 110, luminescent layer 120, transparent electrode layer 130 and substrate that there is light, which to take out the OLED 10 of structure, for this
140,.The luminescent layer 120 is set to the side of said metal electrode layer 110, and the transparent electrode layer 130 is set to the hair
Side of the photosphere 120 far from the metal electrode layer 110, the substrate 140 are set to transparent electrode layer 130 and shine far from described
The side of layer 120.
Wherein, as shown in Figures 2 and 3, the two sides of the substrate 140 are respectively arranged with concaveconvex structure 142 and outer scattering film
Layer 144, the concaveconvex structure 142 is located at the substrate 140 close to the side of the transparent electrode layer 130, the outer scattering film
Layer 144 is located at the light-emitting surface of the substrate 140.
Further, the principle of luminosity of the OLED is by being deposited between metal electrode layer 110 and transparent electrode layer 130
Very thin luminescent layer 120, compound generate shines after being injected with machine semiconductive thin film by positive negative carrier.Wherein, the metal
Electrode layer 110 is the cathode of the OLED, and the transparent electric and layer is the anode of the OLED.
Wherein, the metal electrode layer 110 is the cathode of the OLED 10 that structure is taken out with light, described in selection
When the making material of metal electrode layer 110, in order to increase the luminous efficiency of element, the injection of electronics usually requires low work function
The composition metal of the metals such as Ag, Al, Ca, In, Li and the Mg of (Low work function) or low work function makes cathode,
Such as: Mg-Ag magnesium silver alloy.It should be understood that in embodiments of the present invention, not making to the specific material of the metal electrode layer 110
Limitation.
Further, the transparent electrode layer 130 is the anode of the OLED 10 that structure is taken out with light.It is selecting
When the making material of the metal electrode layer 110, it should be noted that material itself necessarily has a high work function (High work
Function) and therefore high work function, property stabilization and the ITO of light transmission with 4.5eV-5.3eV can be selected in light-transmissive
Transparent conductive film.It should be understood that in embodiments of the present invention, with no restriction to the specific material of the euphotic electrode layer.
Further, the luminescent layer 120 is organic luminous layer 120, and the material of the organic luminous layer 120 must have solid-state
Under have that stronger fluorescent, carrier transportation performance are good, thermal stability and chemical stability are good, quantum efficiency is high and are capable of vacuum evaporation
Characteristic, the materials'use of general organic luminous layer 120 is usually identical as material used by electron transfer layer or electric hole transport layer,
Such as Alq is widely used in green light, Balq and DPVBi are then widely used in blue light.
In general, OLED can be divided into two kinds: small molecule OLED and macromolecule OLED (alternatively referred to as by luminescent material
PLED)。
Further, existing OLED causes the light being emitted from side more in illumination due to total reflection etc., and
The light that side is projected concentrates on certain some wave band, so that the light ratio issued from front is very low, and spectrum is not complete, external quantum efficiency
It is very low.Therefore, Fig. 2 is please referred to, the substrate 140 is provided with concaveconvex structure close to the side of the transparent electrode layer 130
142, the survey far from the transparent electrode layer 130 is provided with outer scattering film layer 144, and the concaveconvex structure 142 is for realizing institute
State OLED interior light take out, it is described it is outer scattering film layer 144 for realizing the OLED outer light take out, thus effectively reduce due to
The light that the reasons such as total reflection are emitted from side, and improve light extraction efficiency.
Specifically, as shown in figure 3, being the sectional view of the substrate 140 provided in an embodiment of the present invention, by directly in institute
It states substrate 140 and makes a kind of interior removing layer of conduct of concaveconvex structure 142, the bumps close to the side of the transparent electrode layer 130
Structure 142 can destroy the total reflection condition of light, to avoid total reflection light loss mode (3 kinds of light loss moulds as shown in Figure 1
Formula).Wherein, the substrate 140 can be plastic base, glass substrate etc., which can be made up of PET, PI material.
The embodiment of the present invention to the material, size, shape of the substrate 140 with no restrictions.
Optionally, the concaveconvex structure 142 is used to destroy the total reflection condition of light, to reduce light from the substrate 140
Side project, therefore, the section of the concaveconvex structure 142 can be a variety of different shapes, as triangle, it is upper it is arc-shaped, under
Arc-shaped, waveform etc., the embodiment of the present invention to the cross sectional shape of the concaveconvex structure 142 with no restrictions.
It should be noted that as shown in figure 4, being on the inclined-plane of the triangle when the section of the concaveconvex structure 142 is triangle
The higher face of planarization, and height, when meeting the height of projection of the lug boss 1422, apex angle need to be greater than 30 degree.Wherein, should
Junction between lug boss 1422 in concaveconvex structure 142 and recessed portion 1424 should also be connected using arc transition, to avoid
Angle generates leakage current.
Further, referring to Fig. 3, the concaveconvex structure 142 includes lug boss 1422 and recessed portion 1424, described
The height of projection h of lug boss 1422 should be greater than the overall thickness of OLED device, and be less than 140 overall thickness of substrate three/
One.At the same time, the distance between the lug boss 1422 and the recessed portion 1424 range d should be 4um-400um.Ying Li
Solution, in actual implementation, the height of projection and the lug boss 1422 and the recessed portion 1424 of the lug boss 1422 it
Between distance meet can destroy the total reflection condition of light under the premise of, allowed certain error.
Optionally, the roughness of the concaveconvex structure 142 is less than 20nm.
Optionally, the concaveconvex structure 142 and the substrate 140 can be using being integrally formed, can also be by will be individual
Concaveconvex structure 142 is set on the substrate 140 by modes such as connections.In order to ensure the base with concaveconvex structure 142
The translucency of plate 140, in embodiments of the present invention, the substrate 140 are integrally formed with the concaveconvex structure 142.
Specifically, in the manufacture substrate 140 with concaveconvex structure 142, different modes can be used and realize,
Here, by taking the substrate 140 is integrally formed with the concaveconvex structure 142 as an example, it can be by being similar to roll printing, calendering formation
Or the mode of laser beam marking makes.Wherein, by taking plastic base 140 as an example, in the plastic base by the way of roll printing
The method that the concaveconvex structure 142 is made on 140 is as follows.
(1) marking recess and protrusion on roller；
(2) roller is impressed on above-mentioned plastic base 140, the production of concaveconvex structure 142 can be completed.
Further, in actual implementation, the metal electrode layer 110, luminescent layer 120, in transparent electrode layer 130 at least
There is one layer to have identical concaveconvex structure 142 with the substrate 140.Specifically, in order to guarantee the light being totally reflected pass through
After the secondary reflection again of reflection electrode layer, the angle of reflection light changes and is unsatisfactory for total reflection condition, takes to reach light
Purpose out.
The concaveconvex structure 142 is set close to the side of the transparent electrode layer 130 above by the substrate 140,
The total reflection condition in optical transmission process is destroyed, so that light is farthest projected to external rings by the substrate 140
Border.At the same time, the light irradiation in order to further increase light extraction efficiency, and on the light-emitting surface for passing through the substrate 140 is more
Add uniformly, referring to Fig. 2, in embodiments of the present invention, scatters film layer by the way that the light-emitting surface setting in the substrate 140 is outer
144, and to emergent light scattered by the realization of crystalline solid 1442 in the outer scattering film layer 144.
Optionally, in embodiments of the present invention, the outer scattering film layer 144 is and organic material for organic material layer
The Tg value of the bed of material should be less than 110 degree.Wherein, Tg value is glass transition temperature value, refers to that high polymer is changed into glassy state by elastomeric state
Temperature.
Optionally, the outer scattering film layer 144 can be to form ground atomizing layer and organic material is deposited, should
50-500nm should be arranged in the thickness of atomizing layer.It further, can when the mist degree range of the atomizing layer is in 5-30%
So that light extraction efficiency reaches 45% or more, it may be preferable to reach 85% or more.
Specifically, in embodiments of the present invention, described in being formed on the light-emitting surface of the substrate 140 by way of vapor deposition
The step of outer scattering film layer 144, is as follows:
(1) organic less than 110 degree in outside light-emitting surface one layer of Tg (glass transition temperature) temperature of vapor deposition of the substrate 140
Material；
(2) by annealing solidification so that the organic film is atomized using as outer scattering film layer 144, or progress spin coating
The high molecular material of low Tg carries out annealing atomization.Wherein, the outer scattering film layer 144 is in 400-700 visible light wave range without absorption.
Optionally, in order to further increase light extraction efficiency, the organic material layer is in 400-700 visible light wave range
Light without absorption.
It should be noted that the outer scattering film layer 144 carry out annealing solidification when, can by 100 degree at a temperature of persistently
Annealing solidifies the preparation of 1h implementation above atomizing layer, to improve light extraction efficiency.Wherein, the mist degree refers to transparent or semi-transparent
Inside or the surface cloud as caused by light diffusion of bright material or the appearance of muddiness.
It should be understood that in embodiments of the present invention, the generation type of the outer scattering film layer 144 is not limited to above-mentioned vapor deposition side
Formula.
Further, when selecting organic material to be deposited, as long as the organic material is forming the outer scattering film layer
After 144, existing in the outer scattering film layer 144 being capable of the crystalline solid that is scattered of the light on the light-emitting surface to the substrate 140
1442, therefore, in embodiments of the present invention, the organic material may be, but not limited to, NBP etc..Specifically, described to have
Machine material can be to contain chemical formula shown in following (a) and (b).Specifically, the organic material can be aromatic hydrocarbons chemical combination
Object, the compound as shown in (c).
Further, based on the description to the above-mentioned OLED 10 for taking out structure with light, the embodiment of the present invention also provides one
Kind OLED luminaire, the OLED luminaire include the above-mentioned OLED 10 that structure is taken out with light.Wherein, OLED luminaire is being carried out
When manufacture, can by choosing different organic materials to the luminescent layer 120 so that the OLED luminaire issue it is different
Light.
It should be understood that the OLED 10 for taking out structure with light that the embodiment of the present invention provides, can be used as above-mentioned OLED lamp
Illuminator in tool, it can also be used in the scenes such as liquid crystal display.
In conclusion the embodiment of the present invention provides a kind of OLED 10 and OLED luminaire for taking out structure with light, wherein
By substrate 140 close to transparent electrode layer 130 side be arranged concaveconvex structure 142, with reduce total reflection etc. due to from
Outer scattering film layer 144 is arranged on the light-emitting surface of the substrate 140, is taken with further increasing light at the same time for the light of side outgoing
Efficiency and utilization rate out.Compared with the prior art, the present invention can improve light extraction efficiency, while structure letter to the greatest extent
It is single, it is easy to accomplish.
Obviously, those skilled in the art should be understood that the function of the above-mentioned embodiment of the present invention can use general meter
Device is calculated to realize, they can be concentrated on a single computing device, or be distributed in net constituted by multiple computing devices
On network, optionally, they can be realized with the executable existing program code of computing device or algorithm, it is thus possible to by it
Store and be performed by computing device in the storage device, perhaps they are fabricated to each integrated circuit modules or
Single integrated circuit module is maked multiple modules or steps in them to realize.In this way, functions implementing the present invention are not
Any specific hardware and software is limited to combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of OLED for taking out structure with light characterized by comprising
Metal electrode layer；
It is set to the luminescent layer of the metal electrode layer side；
It is set to transparent electrode layer of the luminescent layer far from the metal electrode layer side；And
It is set to substrate of the transparent electrode layer far from the luminescent layer side；
The substrate is provided with concaveconvex structure close to the side of the transparent electrode layer, and the side far from the transparent electrode layer is set
It is equipped with outer scattering film layer, the concaveconvex structure takes out for realizing the interior light of the OLED, and the outer scattering film layer is described
The atomizing layer with a thickness of 50-500nm that side of the substrate far from the transparent electrode layer is formed by atomization, for realizing described
The outer light of OLED takes out.
2. the OLED according to claim 1 for taking out structure with light, which is characterized in that the outer scattering film layer is organic
Material layer.
3. the OLED according to claim 2 for taking out structure with light, which is characterized in that the glass of the organic material layer
Change temperature less than 110 DEG C.
4. the OLED according to claim 1 for taking out structure with light, which is characterized in that the mist degree range of the atomizing layer
For 5%-30%.
5. the OLED according to claim 1 for taking out structure with light, which is characterized in that the protrusion of the concaveconvex structure is high
Degree is greater than the overall thickness of OLED device, and is less than the one third of the substrate overall thickness.
6. the OLED according to claim 1 for taking out structure with light, which is characterized in that the protrusion in the concaveconvex structure
The distance between portion and recessed portion range are 4um-400um.
7. the OLED according to claim 1 for taking out structure with light, which is characterized in that the roughness of the concaveconvex structure
Less than 20nm.
8. it is according to claim 1 with light take out structure OLED, which is characterized in that the metal electrode, luminescent layer,
There is identical concaveconvex structure with the substrate at least one layer in transparent electrode layer.
9. a kind of OLED luminaire, which is characterized in that the OLED luminaire includes tool described in any one of the claims 1-8
There is light to take out the OLED of structure.
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| CN108470847A (en) | 2018-04-13 | 2018-08-31 | 京东方科技集团股份有限公司 | OLED device and preparation method thereof, display device |
| TWI677123B (en) * | 2018-11-29 | 2019-11-11 | 機光科技股份有限公司 | Delocalizer and light emitting device using the same |
| CN109873088A (en) * | 2019-02-20 | 2019-06-11 | 湖畔光电科技（江苏）有限公司 | A kind of organic electroluminescent LED and production method |
| CN112563438A (en) * | 2020-12-27 | 2021-03-26 | 湖畔光电科技（江苏）有限公司 | OLED structure capable of improving packaging capacity and preparation method |
| CN112909208B (en) * | 2021-03-09 | 2022-12-30 | 京东方科技集团股份有限公司 | Display device |
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| JP2004265852A (en) * | 2002-09-30 | 2004-09-24 | Toyota Industries Corp | El device, manufacturing method of same, and liquid crystal display device using el device |
| CN203150551U (en) * | 2012-12-12 | 2013-08-21 | 京东方科技集团股份有限公司 | Array substrate and organic light emitting diode display device |
| CN206460978U (en) * | 2017-03-03 | 2017-09-01 | 江苏集萃有机光电技术研究所有限公司 | A kind of OLED and OLED luminaire that structure is taken out with light |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1836469A (en) * | 2003-06-13 | 2006-09-20 | 株式会社丰田自动织机 | EL device, manufacturing method of same, and liquid crystal display device using EL device |
| CN103931010A (en) * | 2011-11-11 | 2014-07-16 | 欧司朗光电半导体有限公司 | Organic light-emitting component |
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