CN109817669B - Organic light-emitting diode display - Google Patents
Organic light-emitting diode display Download PDFInfo
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- CN109817669B CN109817669B CN201910062387.6A CN201910062387A CN109817669B CN 109817669 B CN109817669 B CN 109817669B CN 201910062387 A CN201910062387 A CN 201910062387A CN 109817669 B CN109817669 B CN 109817669B
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Abstract
The present invention provides an organic light emitting diode display, including: an anode disposed on the substrate base plate; a pixel defining layer disposed on a portion of the anode and the substrate not covered by the anode; the pixel definition layer comprises at least two pixel definition units which are arranged at intervals, and at least one pixel definition unit is provided with a groove; a metal layer is arranged in the groove; the organic functional layer is arranged on the anode, and the position of the organic functional layer corresponds to the position of a gap between two adjacent pixel definition units; the electron transmission layer is arranged on the organic functional layer, the metal layer and the pixel definition layer which is not covered by the organic functional layer and the metal layer; the metal layer is conducted with the cathode through the electron transport layer; and the cathode is arranged on the electron transport layer. The organic light emitting diode display can improve the display effect.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to an organic light emitting diode display.
[ background of the invention ]
Compared with a passive Light Emitting Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED) display that emits Light autonomously has the advantages of fast response speed, high contrast, wide viewing angle, and the like, and is easy to implement flexible display, and is widely used. OLED displays are likely to become mainstream products of next generation display technologies.
As shown in fig. 1, a conventional Top-emission (Top-emission) OLED device 100 includes a substrate 11, an anode 12, a pixel defining layer 13, an organic functional layer 20, an electron transport layer 14, and a cathode 15, where the organic functional layer 20 includes a hole injection layer 21, a hole transport layer 22, and an organic light emitting layer 23, and the cathode 15 is located on a light emitting side, so that the cathode is required to have a good light transmission property.
However, the conventional Top-emission cathode material has a relatively high resistance while realizing a relatively high transmittance, i.e., reduces conductivity, so that a relatively serious voltage drop (IR-drop) phenomenon is generated when a large-sized OLED displays, which causes uneven panel light emission and reduces a display effect.
Therefore, it is necessary to provide an organic light emitting diode display to solve the problems of the prior art.
[ summary of the invention ]
The invention aims to provide an organic light emitting diode display which can improve the light emitting uniformity and the display effect.
In order to solve the above technical problem, the present invention provides an organic light emitting diode display, which includes:
a substrate base plate;
the anode is arranged on the substrate base plate;
a pixel defining layer disposed on a portion of the anode and the substrate not covered by the anode; the pixel definition layer comprises at least two pixel definition units which are arranged at intervals, and at least one pixel definition unit is provided with a groove; a metal layer is arranged in the groove;
the organic functional layer is arranged on the anode, and the position of the organic functional layer corresponds to the position of a gap between two adjacent pixel definition units;
the electron transmission layer is arranged on the organic functional layer, the metal layer and the pixel definition layer which is not covered by the organic functional layer and the metal layer; the metal layer is conducted with the cathode through the electron transport layer;
and the cathode is arranged on the electron transport layer.
In the organic light emitting diode display of the present invention, the height of the pixel defining layer is higher than the height of the metal layer.
In the organic light emitting diode display of the present invention, the thickness of the metal layer is smaller than the thickness of the organic functional layer, and the upper surface of the metal layer is flush with the upper surface of the organic functional layer.
In the organic light emitting diode display, the organic functional layer further comprises a hole injection layer, a hole transport layer and an organic light emitting layer which are sequentially arranged on the anode;
the upper surface of the metal layer is flush with the upper surface of the organic light-emitting layer, and the lower surface of the metal layer is flush with the lower surface of the organic light-emitting layer.
In the organic light emitting diode display of the present invention, the material of the electron transport layer includes an organic material and metal nanoparticles.
In the organic light emitting diode display of the present invention, the metal nanoparticles include at least one of silver nanoparticles and gold nanoparticles.
In the organic light emitting diode display of the present invention, in the electron transport layer, the metal nanoparticles are present in a mass percentage range of 1% to 5%.
In the organic light emitting diode display of the present invention, the electron transport layer is formed by depositing on the organic functional layer, the metal layer, and the pixel defining layer not covered by the organic functional layer and the metal layer by vacuum thermal evaporation.
In the organic light emitting diode display of the present invention, the cathode is formed by depositing on the electron transport layer by vacuum thermal evaporation.
In the organic light emitting diode display of the present invention, the organic functional layer is formed by an ink jet printing method.
According to the organic light-emitting diode display, the grooves are formed in the pixel defining units, and the metal layers are arranged in the grooves, so that the metal layers are conducted with the cathode layer through the electron transmission layer, the impedance of the cathode is reduced, the voltage drop is reduced, the panel emits light uniformly, and the display effect is improved.
[ description of the drawings ]
FIG. 1 is a schematic structural diagram of a conventional OLED display;
FIG. 2 is a schematic structural diagram of an OLED display according to the present invention.
[ detailed description ] embodiments
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc. refer to directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an organic light emitting diode display according to the present invention.
As shown in fig. 2, the organic light emitting diode display 100 of the present invention includes a substrate 11, an anode 12, a pixel defining layer 30, an organic functional layer 20, an electron transport layer 33, and a cathode 15.
The substrate 11 may include a glass substrate and a switch array layer on the glass substrate, the switch array layer includes a plurality of thin film transistors, and the anode 12 is connected to the drains of the thin film transistors. The anode 12 is provided on the substrate base plate 11. The anode 12 is obtained by patterning the entire conductive layer provided on the base substrate 11. The material of the anode 12 may be a metal material or indium tin oxide.
The pixel defining layer 30 is provided on a portion of the anode 12 and the substrate base plate 11 not covered by the anode 12. The pixel definition layer 30 includes two pixel definition units 31 arranged at intervals, wherein a groove 311 is arranged on one of the pixel definition units 31. The recess 311 is obtained, for example, by patterning the pixel defining layer 30, wherein the recess 311 is located on top of the pixel defining unit 31. In another embodiment, each pixel defining unit 31 is provided with a groove 311. It is understood that the pixel definition layer 30 may include more than two pixel definition units. Each pixel defining unit 31 is provided with a recess 311.
In one embodiment, in order to improve the effect of blocking water and oxygen, the cross-sectional structure of the pixel defining layer 30 includes a hydrophilic bank layer and a hydrophobic bank layer. A hydrophilic dam layer is positioned at the bottom of the pixel defining layer 30 and a hydrophobic dam layer is disposed at the top surface of the pixel defining layer 30. Wherein the anode 12 and the hydrophilic dam layer are both made of hydrophilic materials, and the hydrophobic dam layer is made of hydrophobic materials.
A metal layer 32 is arranged in the groove 311; in one embodiment, the recess 311 may be filled with a metal material to form the metal layer 32. The material of the metal layer 32 may be the same as that of the cathode.
In order to better protect the organic light emitting diode, the height of the pixel defining layer 30 is higher than the height of the metal layer 32, that is, the height of the upper surface of the pixel defining layer 30 is higher than the height of the upper surface of the metal layer 32.
The organic functional layer 20 is disposed on the anode 12, and the position of the organic functional layer 20 corresponds to the position of the gap between two adjacent pixel defining units 31, that is, the organic functional layer 20 is located in the gap between two adjacent pixel defining units 31. The organic functional layer 20 includes a hole injection layer 21, a hole transport layer 22, and an organic light emitting layer 23, and the hole injection layer 21, the hole transport layer 22, and the organic light emitting layer 23 are sequentially disposed on the anode 12.
In order to improve the service life of the display, the height of the pixel defining layer 30 is higher than the height of the organic functional layer 20, that is, the height of the upper surface of the pixel defining layer 30 is higher than the height of the upper surface of the organic functional layer 20, so as to better protect the organic light emitting diode.
In one embodiment, the organic functional layer 20 is formed by inkjet printing.
In order to make the light emission of the display more uniform, the thickness of the metal layer 32 is smaller than that of the organic functional layer 20, and the upper surface of the metal layer 32 is flush with the upper surface of the organic functional layer 20.
In order to further make the light emission of the display more uniform, the lower surface of the metal layer 32 is flush with the lower surface of the organic light emitting layer 23, and the upper surface of the metal layer 32 is flush with the upper surface of the organic light emitting layer 23.
The electron transport layer 33 is disposed on the organic functional layer 20, the metal layer 32, and the pixel defining layer 30 not covered by the organic functional layer 20 and the metal layer 32; the metal layer 32 is in electrical communication with the cathode 15 through the electron transport layer 33.
To further reduce the impedance of the cathode, in one embodiment, the conductivity of the electron transport layer 33 is greater than the conductivity of existing electron transport layers 33.
In order to improve the conductive performance of the electron transport layer 33, the material of the electron transport layer 33 includes an organic material and metal nanoparticles. That is, the material of the electron transport layer 33 is obtained by doping metal nanoparticles into an organic material, that is, the material is formed by mixing an organic material and metal nanoparticles. Of course, it is understood that the material of the electron transport layer 33 is not limited to the organic material and the metal nanoparticles, but may include other materials to improve the conductive property thereof.
In an embodiment, in order to further improve the conductive performance of the electron transport layer 33, the metal nanoparticles include at least one of silver nanoparticles and gold nanoparticles.
In order to further improve the conductivity of the electron transport layer 33, the mass percentage of the metal nanoparticles in the electron transport layer is 1-5%.
In one embodiment, the electron transport layer 33 is formed by vacuum thermal evaporation on the organic functional layer, the metal layer, and the pixel defining layer not covered by the organic functional layer and the metal layer.
The cathode 15 is provided on the electron transport layer 33. Wherein the cathode is formed by depositing on the electron transport layer by vacuum thermal evaporation. Namely, the cathode and the electron transport layer are formed by the same manufacturing method. The cathode 15 is made of Indium Zinc Oxide (IZO) or a Mg/Ag composite film.
The structure of the existing organic light-emitting diode display is improved, specifically, the groove is arranged on the pixel definition unit, and the metal layer is arranged in the groove, so that the metal layer is conducted with the cathode layer through the electron transmission layer, the impedance of the cathode is reduced, the voltage drop is reduced, the panel emits light uniformly, and the display effect is improved.
According to the organic light-emitting diode display, the grooves are formed in the pixel defining units, and the metal layers are arranged in the grooves, so that the metal layers are conducted with the cathode layer through the electron transmission layer, the impedance of the cathode is reduced, the voltage drop is reduced, the panel emits light uniformly, and the display effect is improved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (7)
1. An organic light emitting diode display, comprising:
a substrate base plate;
the anode is arranged on the substrate base plate;
a pixel defining layer disposed on a portion of the anode and the substrate not covered by the anode; the pixel definition layer comprises at least two pixel definition units arranged at intervals, a groove is arranged on at least one pixel definition unit, and a metal layer is arranged in the groove;
the organic functional layer is arranged on the anode, and the position of the organic functional layer corresponds to the position of a gap between two adjacent pixel definition units; the organic functional layer also comprises a hole injection layer, a hole transport layer and an organic light-emitting layer which are sequentially arranged on the anode;
the electron transmission layer is arranged on the organic functional layer, the metal layer and the pixel definition layer which is not covered by the organic functional layer and the metal layer; the metal layer is conducted with the cathode through the electron transport layer; the material of the electron transport layer comprises an organic material and metal nanoparticles; the thickness of the metal layer is smaller than that of the organic functional layer, the upper surface of the metal layer is flush with the upper surface of the organic light-emitting layer, and the lower surface of the metal layer is flush with the lower surface of the organic light-emitting layer;
and the cathode is arranged on the electron transport layer.
2. The organic light-emitting diode display defined in claim 1 wherein the pixel-defining layer has a height that is higher than the metal layer.
3. The organic light-emitting diode display defined in claim 1 wherein the metal nanoparticles comprise at least one of silver nanoparticles and gold nanoparticles.
4. The organic light-emitting diode display defined in claim 1 wherein the metal nanoparticles are present in the electron transport layer in a range of 1% to 5% by mass.
5. The organic light-emitting diode display according to claim 1, wherein the electron transport layer is formed by vacuum thermal evaporation on the organic functional layer, the metal layer, and the pixel defining layer not covered by the organic functional layer and the metal layer.
6. The organic light-emitting diode display defined in claim 1 wherein the cathode is formed by vacuum thermal evaporation deposited on the electron-transport layer.
7. The organic light-emitting diode display according to claim 1, wherein the organic functional layer is formed by inkjet printing.
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| CN201910062387.6A CN109817669B (en) | 2019-01-23 | 2019-01-23 | Organic light-emitting diode display |
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| CN201910062387.6A CN109817669B (en) | 2019-01-23 | 2019-01-23 | Organic light-emitting diode display |
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| CN109817669B true CN109817669B (en) | 2021-07-23 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110233170B (en) | 2019-06-21 | 2021-10-12 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display device |
| CN110828693A (en) | 2019-10-30 | 2020-02-21 | 深圳市华星光电半导体显示技术有限公司 | Organic light emitting diode device and manufacturing method thereof |
| CN111129345A (en) * | 2019-12-19 | 2020-05-08 | 深圳市华星光电半导体显示技术有限公司 | Organic light emitting diode display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105789477A (en) * | 2015-01-14 | 2016-07-20 | 三星显示有限公司 | Organic light emitting display panel and method of manufacturing the same |
| CN106816453A (en) * | 2015-11-03 | 2017-06-09 | 乐金显示有限公司 | Organic LED display device |
| CN109103342A (en) * | 2018-09-21 | 2018-12-28 | 南京邮电大学 | Whole soln Organic Light Emitting Diode based on metal nanoparticle and preparation method thereof |
| CN109216578A (en) * | 2017-06-30 | 2019-01-15 | 京东方科技集团股份有限公司 | Electroluminescent diode array substrate and preparation method thereof, display panel |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105789477A (en) * | 2015-01-14 | 2016-07-20 | 三星显示有限公司 | Organic light emitting display panel and method of manufacturing the same |
| CN106816453A (en) * | 2015-11-03 | 2017-06-09 | 乐金显示有限公司 | Organic LED display device |
| CN109216578A (en) * | 2017-06-30 | 2019-01-15 | 京东方科技集团股份有限公司 | Electroluminescent diode array substrate and preparation method thereof, display panel |
| CN109103342A (en) * | 2018-09-21 | 2018-12-28 | 南京邮电大学 | Whole soln Organic Light Emitting Diode based on metal nanoparticle and preparation method thereof |
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