CN107644894B - Organic electroluminescent device, preparation method thereof and display device - Google Patents
Organic electroluminescent device, preparation method thereof and display device Download PDFInfo
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- CN107644894B CN107644894B CN201710841805.2A CN201710841805A CN107644894B CN 107644894 B CN107644894 B CN 107644894B CN 201710841805 A CN201710841805 A CN 201710841805A CN 107644894 B CN107644894 B CN 107644894B
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- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000758 substrate Substances 0.000 claims abstract description 158
- 125000006850 spacer group Chemical group 0.000 claims abstract description 91
- 239000002184 metal Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 239000004020 conductor Substances 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 claims description 8
- 238000000059 patterning Methods 0.000 claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 5
- 239000010931 gold Substances 0.000 claims description 5
- 229910052737 gold Inorganic materials 0.000 claims description 5
- 239000010409 thin film Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 70
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Abstract
The invention relates to the technical field of display and discloses an organic electroluminescent device, a preparation method thereof and a display device, wherein the organic electroluminescent device comprises a first substrate and a second substrate which are oppositely arranged, the first substrate comprises a first electrode facing one side of the second substrate, and the second substrate comprises an auxiliary electrode layer facing one side of the first substrate; and a spacer with conductivity is arranged between the first substrate and the second substrate, and the auxiliary electrode layer is electrically connected with the first electrode through the spacer. In the organic electroluminescent device, the spacer with the conductive performance is arranged between the first substrate and the second substrate, so that the electrical connection between the first substrate and the second substrate is realized, the probability that the spacer is damaged to influence the electrical connection between the first substrate and the second substrate is reduced, and the service life of the organic electroluminescent device is prolonged.
Description
Technical Field
The invention relates to the technical field of display, in particular to an organic electroluminescent device, a preparation method thereof and a display device.
Background
The organic electroluminescent display has the characteristics of light weight, low consumption, high response, high resolution and the like, the top emission passive organic electroluminescent display can effectively solve the problems of reduced aperture ratio and reduced display screen brightness caused by a complex thin film field effect transistor compensation circuit, and the color gamut of the display screen of the passive organic electroluminescent display can be improved and the display effect can be improved by utilizing the microcavity effect existing in the structure of the top emission passive organic electroluminescent display.
As the projection part of the top emission passive organic electroluminescent display is necessary, the light transmittance and the conductivity of the transparent cathode are very important, and at present, the auxiliary electrode layer is usually connected with the cathode in a manner of being made on a spacer, but the auxiliary electrode layer is easily broken in a manner of being made on the spacer, so that the display effect of the display device is affected, and the service life of the display device is shorter.
Disclosure of Invention
The invention provides an organic electroluminescent device, a preparation method thereof and a display device, wherein a spacer with conductivity is arranged between a first substrate and a second substrate in the organic electroluminescent device, so that the first substrate and the second substrate are electrically connected, the probability that the spacer is damaged to influence the electrical connection of the first substrate and the second substrate is reduced, and the service life of the organic electroluminescent device is prolonged.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an organic electroluminescent device comprises a first substrate and a second substrate which are oppositely arranged, wherein the first substrate comprises a first electrode facing one side of the second substrate, and the second substrate comprises an auxiliary electrode layer facing one side of the first substrate; and a spacer with conductivity is arranged between the first substrate and the second substrate, and the auxiliary electrode layer is electrically connected with the first electrode through the spacer.
In the organic electroluminescent device, the first substrate comprises the first electrode facing one side of the second substrate, the second substrate comprises the auxiliary electrode layer facing one side of the first substrate, the first electrode and the auxiliary electrode layer are electrically connected by the spacer with conductivity between the first substrate and the second substrate, the electrical connection between the first substrate and the second substrate is realized, the connection mode that the auxiliary electrode layer is arranged on the surface of the spacer to realize the electrical connection between the second substrate and the first substrate in the prior art is replaced, and therefore the auxiliary electrode layer is prevented from breaking in the use process of the organic electroluminescent device, the probability that the first substrate and the second substrate are electrically connected due to damage of the spacer is reduced, and the service life of the organic electroluminescent device is prolonged;
therefore, the spacer with the conductivity is arranged between the first substrate and the second substrate, so that the electric connection between the first substrate and the second substrate is realized, the probability that the spacer is damaged to influence the electric connection between the first substrate and the second substrate is reduced, and the service life of the organic electroluminescent device is prolonged.
Preferably, the spacer comprises a spacer body, a hollow cavity is formed in the spacer body, and a conductive material is filled in the hollow cavity to form a conductive column for electrically connecting the first electrode and the auxiliary electrode layer.
Preferably, in the second substrate, a metal layer corresponding to the conductive pillar is disposed on a side of the auxiliary electrode layer facing the first substrate, and the auxiliary electrode layer is electrically connected to the conductive pillar through the metal layer.
Preferably, the conductive column material is a nano silver wire or a conductive gold ball.
Preferably, a plurality of spacers are disposed between the first substrate and the second substrate, the hollow cavity is formed in each spacer body, and the conductive column is disposed in the hollow cavity of each spacer body.
Preferably, the first substrate includes a thin film transistor device layer, a pixel defining layer, and an organic electroluminescent layer formed in a pixel region defined by the pixel defining layer and located at a side of the first substrate facing the second substrate.
Preferably, the second substrate includes a black matrix layer, a color filter layer, and a flat layer, where the position of the black matrix layer corresponds to the spacer.
Preferably, the first electrode and the auxiliary electrode layer are ITO.
The invention also provides a display device which comprises any one of the organic electroluminescent devices in the technical scheme.
The invention also provides a preparation method of the organic electroluminescent device, which comprises the following steps:
forming a first electrode on one side of the first substrate;
forming an auxiliary electrode on one side of the second substrate;
forming a conductive spacer on one side of the auxiliary electrode away from the second substrate;
the first substrate and the second substrate are paired so that a side of the first substrate on which the first electrode is provided is opposite to a side of the second substrate on which the auxiliary electrode is provided, and the auxiliary electrode is electrically connected with the first electrode through the spacer.
Preferably, the step of forming a conductive spacer on a side of the auxiliary electrode away from the second substrate includes:
forming a spacer material layer on one side of the auxiliary electrode far away from the second substrate;
carrying out a patterning process on the spacer material layer to form the spacer, and forming a cavity penetrating through the spacer in the spacer;
and filling conductive materials into the cavity to form a conductive column, wherein the auxiliary electrode is electrically connected with the first electrode through the conductive column.
Preferably, after forming the auxiliary electrode layer on one side of the second substrate and before forming the spacer material on the side of the auxiliary electrode layer away from the second substrate, the method further comprises:
and forming a metal coating on the auxiliary electrode layer, and forming metal layer patterns corresponding to the positions of the conductive columns one by one through a patterning process, wherein the auxiliary electrode is electrically connected with the conductive columns through the metal layer patterns.
Drawings
Fig. 1 is a schematic structural view of an organic light emitting device according to the present invention.
Icon: 1-a second substrate; 11-an auxiliary electrode layer; 12-a metal layer; 13-a black matrix layer; 14-a color filter layer; 15-a flat layer; 2-a first substrate; 21-a first electrode; 22-thin film transistor device layers; 23-a pixel definition layer; 24-an organic electroluminescent layer; 3-spacer; 31-a spacer body; 32-conductive pillars.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, an organic electroluminescent device provided in an embodiment of the present invention includes a first substrate 2 and a second substrate 1 disposed opposite to each other, the first substrate 2 includes a first electrode 21 facing a side of the second substrate 1, and the second substrate 1 includes an auxiliary electrode layer 11 facing a side of the first substrate 2; a spacer 3 having conductivity is provided between the first substrate 2 and the second substrate 1, and the auxiliary electrode layer 11 is electrically connected to the first electrode 21 through the spacer 3.
In the organic electroluminescent device, the first substrate 2 includes the first electrode 21 facing one side of the second substrate 1, the second substrate 1 includes the auxiliary electrode layer 11 facing one side of the first substrate 2, the spacer 3 with conductive performance is disposed between the first substrate 2 and the second substrate 1 to electrically connect the first electrode 21 and the auxiliary electrode layer 11, so as to realize the electrical connection between the first substrate 2 and the second substrate 1, and replace the prior art in which the auxiliary electrode layer 11 is made on the surface of the spacer 3 to realize the electrical connection between the second substrate 1 and the first substrate 2, thereby avoiding the breakage phenomenon of the auxiliary electrode layer 11 during the use of the organic electroluminescent device, reducing the probability of the damage of the spacer 3 affecting the electrical connection between the first substrate 2 and the second substrate 1, and improving the service life of the organic electroluminescent device;
therefore, the spacer 3 with conductivity is arranged between the first substrate 2 and the second substrate 1, so that the electric connection between the first substrate 2 and the second substrate 1 is realized, the probability that the spacer 3 is damaged to influence the electric connection between the first substrate 2 and the second substrate 1 is reduced, and the service life of the organic electroluminescent device is prolonged.
Specifically, the spacer 3 with conductive performance is made of conductive material, or conductive particles are arranged in the spacer 3.
Specifically, the spacer 3 includes a spacer body 31, a hollow cavity is formed in the spacer body 31, and a conductive material is filled in the hollow cavity to form a conductive post 32 for electrically connecting the first electrode 21 and the auxiliary electrode layer 11.
In the spacer 3, the first electrode 21 is electrically connected with the auxiliary electrode layer 11 by arranging the hollow cavity in the spacer body 31 and filling the conductive material in the hollow cavity to form the conductive column 32, so that the electrical connection between the first substrate 2 and the second substrate 1 is realized, the spacer body 31 outside the conductive column 32 can reduce the pressure born by the conductive column 32, thereby reducing the damage probability of the spacer 3 in the use process of the organic electroluminescent device and prolonging the service life of the organic electroluminescent device.
Specifically, the material of the conductive post 32 is a nano silver wire or a conductive gold ball.
The nano silver wire or the conductive gold ball adopted by the conductive column 32 has excellent conductivity, and the nano silver wire or the conductive gold ball adopted by the conductive column 32 reduces energy loss in the conductive process.
In the second substrate 1, as one embodiment of the second substrate 1, the metal layer 12 corresponding to the conductive post 32 is provided on the side of the auxiliary electrode layer 11 facing the first substrate 2, and the auxiliary electrode layer 11 is electrically connected to the conductive post 32 through the metal layer 12.
In the second substrate 1, the metal layer 12 is disposed between the auxiliary electrode layer 11 and the conductive post 32, so that the contact area between the metal layer 12 and the conductive post 32 is increased, the stability of the electrical connection between the conductive post 32 and the auxiliary electrode layer 11 is ensured, and the stability of the electrical connection between the second substrate 1 and the first substrate 2 is improved.
As an embodiment of the spacer 3, a plurality of spacers 3 are disposed between the first substrate 2 and the second substrate 1, a hollow cavity is formed in each spacer body 31, and a conductive post 32 is disposed in the hollow cavity of each spacer body 31.
In the above spacers 3, the conductive columns 32 are disposed in each spacer 3, so that the conductive efficiency between the first substrate 2 and the second substrate 1 is improved, and when one or more of the conductive columns 32 are damaged, the remaining conductive columns 32 can continue to conduct electricity, thereby ensuring the normal use of the organic electroluminescent device.
As an embodiment of the first substrate 2, the first substrate 2 includes a thin film transistor device layer 22, a pixel defining layer 23, and an organic electroluminescent layer 24 formed in a pixel region defined by the pixel defining layer 23 and located on a side of the first substrate 2 facing the second substrate 1.
As an embodiment of the second substrate 1, the second substrate 1 includes a black matrix layer 13, a color filter layer 14, and a flat layer 15, and the black matrix layer 13 is disposed at a position corresponding to the spacer.
In the second substrate 1, the black matrix layer 13 is disposed corresponding to the spacers, so as to avoid decreasing the aperture ratio and improve the brightness of the display device.
Specifically, the first electrode 21 and the auxiliary electrode layer 11 are ITO.
The embodiment of the invention also provides a display device which comprises any one of the organic electroluminescent devices in the embodiment.
The embodiment of the invention also provides a preparation method of the organic electroluminescent device, which comprises the following steps:
forming a first electrode 21 on one side of the first substrate 2;
forming an auxiliary electrode on one side of the second substrate 1;
forming a conductive spacer on a side of the auxiliary electrode away from the second substrate 1;
the first substrate 2 and the second substrate 1 are paired such that the side of the first substrate 2 on which the first electrode 21 is provided is opposite to the side of the second substrate 1 on which the auxiliary electrode is provided, and the auxiliary electrode is electrically connected to the first electrode 21 through a spacer.
In the preparation method of the organic electroluminescent device, the first electrode 21 is formed on one side of the first substrate 2, the auxiliary electrode and the spacer 3 are formed on one side of the second substrate 1, and the second substrate 1 is connected with the first substrate 2 in a box-to-box manner to form the organic electroluminescent device, wherein the spacer 3 has conductivity, so that the first substrate 2 and the second substrate 1 are electrically connected, the probability of influencing the conductivity of the first substrate 2 and the second substrate 1 due to the damage of the spacer 3 in the use process of the organic electroluminescent device is reduced, and the service life of the organic electroluminescent device is prolonged.
Specifically, the step of forming the spacer 3 having conductivity on the side of the auxiliary electrode away from the second substrate 1 includes:
forming a spacer material layer on one side of the auxiliary electrode away from the second substrate 1;
carrying out a patterning process on the spacer material layer to form a spacer 3, and forming a cavity penetrating through the spacer 3 in the spacer 3;
the cavity is filled with a conductive material to form a conductive post 32, and the auxiliary electrode is electrically connected to the first electrode 21 through the conductive post 32.
In the spacer 3, the cavity is formed in the spacer body 31, and the conductive material is filled in the cavity to form the conductive column 32, so that the spacer body 31 outside the conductive column 32 can reduce the pressure applied to the conductive column 32, thereby reducing the probability of damaging the spacer 3 in the use process of the organic electroluminescent device and prolonging the service life of the organic electroluminescent device.
Specifically, after forming the auxiliary electrode layer 11 on the side of the second substrate 1 and before forming the spacer material on the side of the auxiliary electrode layer 11 away from the second substrate 1, the method further includes:
a metal coating layer is formed on the auxiliary electrode layer 11, and metal layer patterns corresponding to the conductive pillars 32 provided in the spacers 3 one by one are formed through a patterning process, and the auxiliary electrode is electrically connected to the conductive pillars 32 through the metal layer patterns.
It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. An organic electroluminescent device, comprising a first substrate and a second substrate which are oppositely arranged, wherein the first substrate comprises a first electrode facing one side of the second substrate, and the second substrate comprises an auxiliary electrode layer facing one side of the first substrate; a spacer with conductivity is arranged between the first substrate and the second substrate, and the auxiliary electrode layer is electrically connected with the first electrode through the spacer;
the spacer comprises a spacer body, wherein a hollow cavity is formed in the spacer body, and conductive materials are filled in the hollow cavity to form a conductive column for electrically connecting the first electrode and the auxiliary electrode layer.
2. The organic electroluminescent device according to claim 1, wherein in the second substrate, a metal layer corresponding to the conductive pillar is provided on a side of the auxiliary electrode layer facing the first substrate, and the auxiliary electrode layer is electrically connected to the conductive pillar through the metal layer.
3. The organic electroluminescent device of claim 1, wherein the conductive pillar material is a nano silver wire or a conductive gold sphere.
4. The organic electroluminescent device according to claim 1, wherein a plurality of spacers are disposed between the first substrate and the second substrate, the hollow cavity is formed in each spacer body, and the conductive column is disposed in the hollow cavity of each spacer body.
5. The organic electroluminescent device of claim 1, wherein the first substrate comprises a thin film transistor device layer, a pixel defining layer, and an organic electroluminescent layer formed within a pixel region defined by the pixel defining layer and located on a side of the first substrate facing the second substrate.
6. The organic electroluminescent device according to claim 1, wherein the second substrate comprises a black matrix layer, a color filter layer, and a flat layer, and the black matrix layer is disposed corresponding to the spacer.
7. The organic electroluminescent device of any one of claims 1-6, wherein the first electrode and the auxiliary electrode layer are ITO.
8. A display device comprising the organic electroluminescent device as claimed in any one of claims 1 to 7.
9. A method for manufacturing an organic electroluminescent device, comprising:
forming a first electrode on one side of a first substrate;
forming an auxiliary electrode on one side of the second substrate;
forming a conductive spacer on one side of the auxiliary electrode away from the second substrate;
pairing the first substrate and the second substrate so that one side of the first substrate provided with the first electrode is opposite to one side of the second substrate provided with the auxiliary electrode, and the auxiliary electrode is electrically connected with the first electrode through the spacer;
wherein the step of forming the conductive spacer on the side of the auxiliary electrode away from the second substrate comprises:
forming a spacer material layer on one side of the auxiliary electrode far away from the second substrate;
carrying out a patterning process on the spacer material layer to form the spacer, and forming a cavity penetrating through the spacer in the spacer;
and filling conductive materials into the cavity to form a conductive column, wherein the auxiliary electrode is electrically connected with the first electrode through the conductive column.
10. The method of manufacturing according to claim 9, wherein after forming the auxiliary electrode layer on the side of the second substrate and before forming the spacer material on the side of the auxiliary electrode layer away from the second substrate, further comprising:
and forming a metal coating on the auxiliary electrode layer, and forming metal layer patterns corresponding to the positions of the conductive columns one by one through a patterning process, wherein the auxiliary electrode is electrically connected with the conductive columns through the metal layer patterns.
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| CN201710841805.2A CN107644894B (en) | 2017-09-18 | 2017-09-18 | Organic electroluminescent device, preparation method thereof and display device |
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| CN201710841805.2A CN107644894B (en) | 2017-09-18 | 2017-09-18 | Organic electroluminescent device, preparation method thereof and display device |
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| CN107644894B true CN107644894B (en) | 2023-11-24 |
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| CN109037481B (en) * | 2018-08-01 | 2022-05-31 | 京东方科技集团股份有限公司 | Organic light-emitting display cover plate, manufacturing method, display panel and display device |
| CN109390497B (en) * | 2018-10-24 | 2020-12-04 | 京东方科技集团股份有限公司 | Cover plate and display device |
| CN110120408B (en) * | 2019-05-05 | 2021-12-03 | 深圳市华星光电半导体显示技术有限公司 | OLED display panel |
| CN111599937B (en) | 2020-05-25 | 2022-10-14 | 视涯科技股份有限公司 | Organic light-emitting display panel and preparation method thereof |
| CN113451528B (en) * | 2021-06-29 | 2022-11-11 | 合肥鑫晟光电科技有限公司 | Display panel, manufacturing method thereof and display device |
| CN113555516B (en) * | 2021-07-20 | 2023-05-23 | 京东方科技集团股份有限公司 | Packaging cover plate, display panel and display device |
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