Display panel, display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-11502275-B2
Application number	US-201916613333-A
Country	US
Kind code	B2
Filing date	Apr 4, 2019
Priority date	Jun 29, 2018
Publication date	Nov 15, 2022
Grant date	Nov 15, 2022

Abstract

The present disclosure provides a display panel including a substrate, an organic electroluminescent device, and an absorbing layer, wherein the organic electroluminescent device is arranged on the substrate, and the absorbing layer covers the organic electroluminescent device and the substrate. The absorbing layer includes an oxygen absorbing layer and a photocatalytic layer for catalyzing water decomposition, the photocatalytic layer covers the organic electroluminescent device and the substrate around the organic electroluminescent device, and the oxygen absorbing layer is covered on the photocatalytic layer and the substrate around the photocatalytic layer.

First claim

What is claimed is:

1. A display panel comprising a substrate, an organic electroluminescent device, and an absorbing layer;
the organic electroluminescent device is arranged on the substrate;
the absorbing layer covers the organic electroluminescent device and the substrate;
wherein the absorbing layer comprises an oxygen absorbing layer and a photocatalytic layer for catalyzing water decomposition;
the photocatalytic layer covers the organic electroluminescent device and the substrate around the organic electroluminescent device, and the oxygen absorbing layer covers the photocatalytic layer and the substrate around the photocatalytic layer.

2. The display panel according to claim 1 , wherein the absorbing layer further comprises a hydrogen absorbing layer covering the organic electroluminescent device and the substrate around the organic electroluminescent device, the photocatalytic layer covers the hydrogen absorbing layer and the substrate around the hydrogen absorbing layer.

3. The display panel according to claim 1 , wherein the absorbing layer comprises at least two layers of the photocatalytic layer and at least two layers of the oxygen absorbing layer;
the photocatalytic layer and the oxygen absorbing layer are alternately stacked.

4. The display panel according to claim 3 , wherein the material of the photocatalytic layer is a semiconductor photocatalytic material having a band gap greater than 1.23 eV.

5. The display panel according to claim 4 , wherein the semiconductor photocatalytic material comprises at least one of a composite material of titanium oxide, a composite material of zinc oxide, and a composite material of carbon nitride.

6. The display panel according to claim 2 , wherein the material of the hydrogen absorbing layer is a hydrogen storage material.

7. The display panel of claim 6 , wherein the hydrogen storage material comprises metal-organic frameworks (MOFs).

8. The display panel of claim 7 , wherein the metal-organic framework is a MOFs material centered on ZnO 4 .

9. The display panel of claim 8 , wherein the metal-organic framework is MOF-5 (Zn 4 O(BDC) 3 , wherein BDC is 1,4-terephthalate.

10. The display panel according to claim 8 , wherein the metal-organic framework is MOF-177 (Zn 4 O(BTB) 2 , wherein BTB is 1,3,5-benzotribenzoate.

11. The display panel according to claim 5 , wherein the photocatalytic layer has a thickness of about 0.3 to 0.5 μm.

12. The display panel according to claim 1 , wherein the material of the oxygen absorbing layer comprises at least one of an organic polyester-based material and iron powder.

13. The display panel according to claim 12 , wherein said oxygen absorbing layer has a thickness of about 0.6 to 1 μm.

14. A display device comprising the display panel according to claim 13 .

15. A manufacturing method for a display panel according to claim 1 , the method comprising:
providing the substrate;
forming the organic electroluminescent device on the substrate;
forming the absorbing layer on the organic electroluminescent device and the substrate;
wherein the absorbing layer comprises the oxygen absorbing layer and the photocatalytic layer for catalyzing water decomposition, and the step of forming the absorbing layer on the organic electroluminescent device and the substrate comprises:
forming the photocatalytic layer covering the organic electroluminescent device and the substrate around the organic electroluminescent device,
forming the oxygen absorbing layer covering the photocatalytic layer and the substrate around the photocatalytic layer.

16. The manufacturing method for a display panel according to claim 15 , wherein the steps of forming the photocatalytic layer further comprises:
forming a hydrogen absorbing layer, which is located on a surface of the photocatalytic layer away from the oxygen absorbing layer, wherein the hydrogen absorbing layer covers the organic electroluminescent device and the substrate around the organic electroluminescent device, the photocatalytic layer covers the hydrogen absorbing layer and the substrate around the hydrogen absorbing layer.

17. The manufacturing method for a display panel according to claim 16 , wherein the steps of forming the photocatalytic layer comprises:
forming the photocatalytic layer by vapor deposition or magnetron sputtering;
the steps of forming the oxygen absorbing layer comprises:
forming the oxygen absorbing layer by vapor deposition or magnetron sputtering.

18. The manufacturing method for a display panel according to claim 17 , wherein the material of the photocatalytic layer is a semiconductor photocatalytic material, the band gap of the semiconductor photocatalytic material is greater than 1.23 eV, and the material of the oxygen absorbing layer comprises at least one of an organic polyester material and an iron powder.

19. The manufacturing method for a display panel according to claim 18 , wherein the photocatalytic layer has a thickness of about 0.3 to 0.5 μm, and the oxygen absorbing layer has a thickness of about 0.6 to 1 μm.

Assignees

• Fuzhou Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd
• Beijing Boe Technology Dev Co Ltd

Inventors

• Chen Yunjin
• Feng Yuchun
• Yang Shanshan
• Sun Moli
• Cui Ting

Classifications

• B01J27/24

  Nitrogen compounds · CPC title

• B01J23/06

  of zinc, cadmium or mercury · CPC title

• B01J21/063

  Titanium; Oxides or hydroxides thereof · CPC title

• B01J20/226 Primary

  Coordination polymers, e.g. metal-organic frameworks [MOF], zeolitic imidazolate frameworks [ZIF] (preparation of metal complexes containing carboxylic acid moieties C07C51/418; MOF's per se C07F) · CPC title

• H01L51/0092

  Electricity · mapped topic