Light-emitting device and method for manufacturing the same, and display panel

Patent metadata

Field	Value
Publication number	US-11737305-B2
Application number	US-202017260018-A
Country	US
Kind code	B2
Filing date	May 27, 2020
Priority date	May 30, 2019
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A light-emitting device includes: an anode disposed on a base, and a cathode disposed on a side of the anode facing away from the base. The anode includes a light-reflecting sub-electrode and a light-transmitting sub-electrode located on a surface of the light-reflecting sub-electrode facing away from the base, and an orthographic projection of the light-transmitting sub-electrode on the base is located within a range of an orthographic projection of the light-reflecting sub-electrode on the base. The light-reflecting sub-electrode includes a metal pattern and a metal oxide pattern, and the metal oxide pattern is located in at least part of a region around the metal pattern.

First claim

What is claimed is:

1. A light-emitting device, comprising:
an anode disposed on a base; and
a cathode disposed on a side of the anode facing away from the base;
wherein the anode includes a light-reflecting sub-electrode and a light-transmitting sub-electrode located on a surface of the light-reflecting sub-electrode facing away from the base, and an orthographic projection of the light-transmitting sub-electrode on the base is located within a range of an orthographic projection of the light-reflecting sub-electrode on the base; and
the light-reflecting sub-electrode includes a metal pattern and a metal oxide pattern, and the metal oxide pattern is located in at least part of a region around the metal pattern.

2. The light-emitting device according to claim 1 , wherein the metal oxide pattern surrounds the metal pattern.

3. The light-emitting device according to claim 1 , wherein the metal pattern and the metal oxide pattern are an integrated structure.

4. The light-emitting device according to claim 1 , wherein a material of the metal oxide pattern includes an oxide of a material of the metal pattern.

5. The light-emitting device according to claim 1 , wherein an orthographic projection of the metal pattern on the base is located within a range of the orthographic projection of the light-transmitting sub-electrode on the base.

6. The light-emitting device according to claim 5 , wherein a boundary of orthographic projection of the metal pattern on the base and a boundary of the orthographic projection of the light-transmitting sub-electrode on the base have a distance therebetween, the distance is within a range from 0.1 μm to 1 μm.

7. The light-emitting device according to claim 1 , wherein the orthographic projection of the light-reflecting sub-electrode on the base coincides with the orthographic projection of the light-transmitting sub-electrode on the base.

8. The light-emitting device according to claim 1 , further comprising: a light-emitting layer disposed between the anode and the cathode; wherein
the light-emitting layer is an organic light-emitting layer or a quantum dot light-emitting layer.

9. The light-emitting device according to claim 1 , wherein a material of the cathode includes a light-transmitting material.

10. A method for manufacturing a light-emitting device, the method comprising:
forming an anode on a base; and
forming a cathode on a side of the anode facing away from the base;
wherein forming the anode includes:
forming a metal film on the base;
forming a light-transmitting conductive film on a surface of the metal film facing away from the base;
patterning the light-transmitting conductive film and the metal film using a single patterning process to form a light-transmitting sub-electrode and a metal pattern, an orthographic projection of the metal pattern on the base being located within a range of an orthographic projection of the light-transmitting sub-electrode on the base; and
performing an oxidation treatment on at least part of the metal pattern that is in noncontact with the light-transmitting sub-electrode to form a metal oxide pattern located in at least part of a region around the metal pattern, and to obtain a light-reflecting sub-electrode, the orthographic projection of the light-transmitting sub-electrode on the base being located within a range of an orthographic projection of the light-reflecting sub-electrode on the base.

11. The method according to claim 10 , wherein performing the oxidation treatment on the at least part of the metal pattern that is in noncontact with the light-transmitting sub-electrode, includes:
placing the at least part of the metal pattern that is in noncontact with the light-transmitting sub-electrode in an electrolyte, and
energizing the metal pattern to make the at least part of the metal pattern react with the electrolyte using an anodic oxidation method to obtain the metal oxide pattern located in the at least part of the region around the metal pattern.

12. The method according to claim 11 , wherein the electrolyte includes ethylene glycol and ammonium tartrate.

13. A display panel, comprising:
the base; and
a plurality of light-emitting devices according to claim 1 ; wherein the plurality of light-emitting devices are disposed on the base.

14. The display panel according to claim 13 , further comprising: a plurality of pixel driving circuits disposed between the base and the plurality of light-emitting devices; wherein
at least one pixel driving circuit includes a driving transistor, and one of a source electrode and a drain electrode of the driving transistor is electrically connected to an anode of one of the plurality of light-emitting devices.

15. The light-emitting device according to claim 2 , wherein the metal pattern and the metal oxide pattern are an integrated structure.

16. The light-emitting device according to claim 2 , wherein a material of the metal oxide pattern includes an oxide of a material of the metal pattern.

17. The light-emitting device according to claim 3 , wherein a material of the metal oxide pattern includes an oxide of a material of the metal pattern.

Assignees

• Hefei Xinsheng Optoelectronics Technology Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Song Wei
• Zhao Ce
• Ding Yuankui
• Wang Ming
• Liu Ning
• Cheng Leilei
• Peng Junlin
• Hu Yingbin
• Ni Liusong

Classifications

• H10K59/80515

  characterised by their shape · CPC title

• H10K2102/00

  Constructional details relating to the organic devices covered by this subclass · CPC title

• H10K50/818 Primary

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title

• H10K59/80518 Primary

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title