CN-116916675-B - Array substrate, preparation method thereof and display device

CN116916675BCN 116916675 BCN116916675 BCN 116916675BCN-116916675-B

Abstract

The invention provides an array substrate, a preparation method thereof and a display device, wherein the array substrate comprises a substrate, a plurality of light emitting devices which are arranged on the substrate in an array mode, a transparent area is arranged in a spacing area of the plurality of light emitting devices, the light emitting devices comprise a first electrode, an organic light emitting layer and a second electrode which are arranged on the substrate in a stacked mode, orthographic projection of the organic light emitting layer on the substrate is not overlapped with the transparent area, the first electrode is a reflecting electrode, the second electrode is configured to partially transmit and partially reflect light emitted by the organic light emitting layer, a pixel defining layer is arranged on the substrate, the pixel defining layer comprises first opening areas which are arranged at intervals and second opening areas which are configured to limit the transparent area, each light emitting device is arranged at one first opening area, an isolating layer is arranged in the second opening area, and the isolating layer is configured to prevent the second electrode from extending to the transparent area.

Inventors

YE ZHIJIE
LI XINYU
JIA WENBIN
WANG XINXIN
PENG RUI
FAN ZHAOKANG

Assignees

合肥京东方卓印科技有限公司
京东方科技集团股份有限公司
北京京东方技术开发有限公司

Dates

Publication Date: 20260508
Application Date: 20230815

Claims (9)

1. An array substrate, characterized by comprising: a substrate base; The light emitting device comprises a first electrode, an organic light emitting layer and a second electrode, wherein the first electrode, the organic light emitting layer and the second electrode are stacked on the substrate, the orthographic projection of the organic light emitting layer on the substrate is not overlapped with the transparent region, the first electrode is a reflecting electrode, and the second electrode is configured to partially transmit and partially reflect light emitted by the organic light emitting layer; a pixel defining layer disposed on the substrate base plate, the pixel defining layer including first opening regions disposed at intervals and second opening regions configured to define transparent regions, each of the light emitting devices being disposed at one of the first opening regions, an isolation layer disposed within the second opening region, the isolation layer configured to prevent the second electrode from extending to the transparent region; The second electrodes of the light emitting devices are mutually communicated, the side wall of the pixel defining layer, which is close to the second opening area, is a slope surface, and the second electrodes cover at least part of the area of the slope surface in a conformal manner and are connected with the edge of the isolating layer.
2. The array substrate of claim 1, wherein the orthographic projection of the isolation layer on the substrate and the orthographic projection of the second electrode on the substrate do not overlap each other.
3. The array substrate of claim 1, wherein the material of the second electrode is magnesium, and the material of the isolation layer comprises 8-hydroxyquinoline lithium or bis (2-methyl-8-hydroxyquinoline) -4- (p-phenylphenol) aluminum.
4. The array substrate according to claim 1, wherein the thickness of the isolation layer in a direction perpendicular to the substrate is 1nm to 10nm.
5. The array substrate according to claim 1, wherein the thickness of the second electrode in a direction perpendicular to the substrate is 10nm to 15nm.
6. The array substrate of claim 1, wherein the transmittance of the second electrode is 50% -70%.
7. The array substrate of claim 1, wherein the light-emitting device further comprises an electron transport layer and an electron injection layer between the organic light-emitting layer and the second electrode, the electron transport layer and the electron injection layer extending to the transparent region, the isolation layer being located on a side of the electron injection layer remote from the substrate, The material of the electron injection layer comprises sodium fluoride or the material of the electron injection layer comprises an n-type doped electron transport layer material.
8. A display device comprising the array substrate according to any one of claims 1 to 7.
9. The preparation method of the array substrate is characterized by comprising the following steps: Providing a substrate; Sequentially forming first electrodes of a plurality of light emitting devices and forming a pixel defining layer on the substrate, wherein the plurality of light emitting devices are arranged in an array on the substrate, a transparent region is arranged in a spacing region of the plurality of light emitting devices, the first electrodes are reflecting electrodes, and the pixel defining layer comprises first opening regions arranged at intervals and second opening regions configured to define the transparent regions, and each light emitting device corresponds to one first opening region; Forming organic light emitting layers of the plurality of light emitting devices in the first opening region, wherein orthographic projections of the organic light emitting layers on the substrate base plate and the transparent region are not overlapped; Forming an isolation layer in the second opening region; Forming a second electrode of the plurality of light emitting devices on the organic light emitting layer, wherein the isolation layer is configured to prevent the second electrode from extending to the transparent region, the second electrode is configured to partially transmit and partially reflect light emitted by the organic light emitting layer, the second electrodes of the plurality of light emitting devices are communicated with each other, a side wall of the pixel defining layer, which is close to the second opening region, is a slope surface, and the second electrode covers at least a partial region of the slope surface in a conformal manner and meets an edge of the isolation layer.

Description

Array substrate, preparation method thereof and display device Technical Field The disclosure relates to the technical field of display, in particular to an array substrate, a preparation method thereof and a display device. Background Organic electroluminescent devices such as OLED (Organic LIGHT EMITTING Diode) have advantages of self-luminescence, wide viewing angle, wide color gamut, high contrast, light and thin, etc., and are widely used in display products. At present, an OLED transparent display panel is increasingly favored by people, and the OLED transparent display panel is provided with a light-emitting area and a transparent area, so that on one hand, the display is realized through the light-emitting area, and on the other hand, the transparent characteristic of the display panel is realized through the transparent area. Disclosure of Invention The array substrate, the preparation method thereof and the display device provided by the embodiment of the disclosure can ensure the transparency of the transparent area, ensure the display color gamut and improve the light emitting efficiency. In a first aspect, some embodiments of the present disclosure provide an array substrate including a substrate, a plurality of light emitting devices arranged in an array on the substrate, a spacing region of the plurality of light emitting devices being provided with a transparent region, the light emitting devices including a first electrode, an organic light emitting layer, and a second electrode stacked on the substrate, an orthographic projection of the organic light emitting layer on the substrate and the transparent region not overlapping each other, the first electrode being a reflective electrode, the second electrode being configured to partially transmit and partially reflect light emitted from the organic light emitting layer, a pixel defining layer disposed on the substrate, the pixel defining layer including a first opening region disposed at intervals and a second opening region configured to define a transparent region, each of the light emitting devices being disposed at one of the first opening regions, the second opening region being provided with an isolation layer therein configured to prevent the second electrode from extending to the transparent region. Optionally, the second electrodes of the light emitting devices are mutually communicated, a side wall of the pixel defining layer close to the second opening area is a slope surface, and the second electrode covers at least part area of the slope surface and is connected with the edge of the isolating layer. Optionally, the orthographic projection of the isolation layer on the substrate and the orthographic projection of the second electrode on the substrate are not overlapped. Optionally, the material of the second electrode is magnesium, and the material of the isolation layer comprises 8-hydroxyquinoline lithium or bis (2-methyl-8-hydroxyquinoline) -4- (p-phenylphenol) aluminum. Optionally, the thickness of the isolation layer in the direction perpendicular to the substrate base plate is 1nm-10nm. Optionally, the thickness of the second electrode in the direction perpendicular to the substrate base plate is 10nm-15nm. Optionally, the transmittance of the second electrode is 50% -70%. Optionally, the light emitting device further comprises an electron transport layer and an electron injection layer, wherein the electron transport layer and the electron injection layer are positioned between the organic light emitting layer and the second electrode, the electron transport layer and the electron injection layer extend to the transparent area, and the isolation layer is positioned on one side of the electron injection layer away from the substrate base plate. The material of the electron injection layer comprises sodium fluoride or the material of the electron injection layer comprises an n-type doped electron transport layer material. In a second aspect, some embodiments of the present disclosure provide a display device, including the array substrate provided in the first aspect. In a third aspect, some embodiments of the present disclosure provide a method for manufacturing an array substrate, including providing a substrate, sequentially forming first electrodes of a plurality of light emitting devices on the substrate and forming a pixel defining layer, wherein the plurality of light emitting devices are arranged in an array on the substrate, a transparent region is provided in a spaced region of the plurality of light emitting devices, the first electrodes are reflective electrodes, the pixel defining layer includes first spaced open regions and second open regions configured to define the transparent region, each of the light emitting devices corresponds to one of the first open regions, forming an organic light emitting layer of the plurality of light emitting devices in the first open regions, a orthographic projection of the orga