Light-emitting member and method for preparing the same as well as display device

• US 9,748,524 B2
• Filed: 09/11/2015
• Issued: 08/29/2017
• Est. Priority Date: 03/10/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Ordos Yuansheng Optoelectronics Co., Ltd. (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd., Ordos Yuansheng Optoelectronics Co., Ltd. (BOE Technology Group Co., Ltd.)
• Inventors: Wang, Tong
• Primary Examiner(s): Coleman, William
• Application Number:
  US14/907,645
• Publication Number:
  US 20160268549A1
• Time in Patent Office: 718 Days
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 50/818 Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 50/822 characterised by their shape
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 59/805 Electrodes
• CPC Class Codes: H10K 59/80518 Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 59/80521 characterised by their shape
• CPC Class Codes: H10K 59/878 comprising reflective means
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

Disclosed are a light-emitting member and a method for preparing the same as well as a display device. The light-emitting member includes a first electrode layer, a second electrode layer having a polarity opposite to that of the first electrode layer, a light-emitting layer and an isolation layer, the light-emitting layer is located on the first electrode layer, the second electrode layer is located on a side of the light-emitting layer, and the isolation layer is located on a side of the first electrode layer to isolate the first electrode layer from the second electrode layer.

Claims

1. A light-emitting member, comprising a substrate, a first electrode layer, a second electrode layer having a polarity opposite to that of the first electrode layer, a light-emitting layer, and an isolation layer, wherein:

the light-emitting layer is located on the first electrode layer, the second electrode layer is located on a side of the light-emitting layer, and the isolation layer is located on a side of the first electrode layer to isolate the first electrode layer from the second electrode layer;

a projection of the second electrode layer on the substrate is not overlapped with a projection of the first electrode layer on the substrate, and a projection of the second electrode layer on the substrate is not overlapped with a projection of the light-emitting layer on the substrate.

2. The light-emitting member according to claim 1, wherein a cross-sectional shape of the light-emitting layer is a trapezoidal body, and a surface, adjacent to the first electrode layer, of the light-emitting layer is a smaller bottom surface of the trapezoidal body.

3. The light-emitting member according to claim 1, wherein adjacent side surfaces of the second electrode layer and the light-emitting layer have a same inclination angle.

4. The light-emitting member according to claim 1, wherein a material of the second electrode layer comprises a reflective material.

5. The light-emitting member according to claim 1, wherein a lower edge, adjacent to a side surface of the second electrode layer, of the light-emitting layer is in contact with an edge of a top surface of the isolation layer.

6. The light-emitting member according to claim 1, wherein the first electrode layer is an anode layer and the second electrode layer is a cathode layer.

7. The light-emitting member according to claim 1, wherein a hole transport layer is provided between the first electrode layer and the light-emitting layer.

8. The light-emitting member according to claim 1, wherein a hole injection layer is provided between the first electrode layer and the light-emitting layer.

9. The light-emitting member according to claim 1, wherein an electron transport layer is provided between the second electrode layer and the light-emitting layer.

10. The light-emitting member according to claim 1, wherein a hole blocking layer is provided between the second electrode layer and the light-emitting layer.

11. The light-emitting member according to claim 1, wherein an electron blocking layer is provided between the first electrode layer and the light-emitting layer.

12. The light-emitting member according to claim 1, wherein an electron injection layer is provided between the second electrode layer and the light-emitting layer.

13. The light-emitting member according to claim 1, wherein a material of the first electrode layer comprises a reflective material.

14. A display device, comprising the light-emitting member according to claim 1.

15. A method for preparing a light-emitting member, wherein the light-emitting member comprises a first electrode layer, a second electrode layer having a polarity opposite to that of the first electrode layer, a light-emitting layer, and an isolation layer, the method comprising:

forming the first electrode layer on a substrate;

forming the isolation layer on a side of the first electrode layer on the substrate;

forming the second electrode layer on the isolation layer, the second electrode layer being isolated from the first electrode layer by the isolation layer; and

forming the light-emitting layer on a side of the second electrode layer and on the first electrode layer;

a projection of the second electrode layer on the substrate is not overlapped with a projection of the first electrode layer on the substrate, and a projection of the second electrode layer on the substrate is not overlapped with a projection of the light-emitting layer on the substrate.

16. The method according to claim 15, wherein the first electrode layer is an anode layer and the second electrode layer is a cathode layer.

17. The method according to claim 16, after forming the first electrode layer on the substrate, further comprising:

forming a hole injection layer on the first electrode layer and forming a hole transport layer on the hole injection layer.

18. The method according to claim 16, after forming the second electrode layer on the isolation layer, further comprising:

forming an electron transport layer on a side of the second electrode layer and forming a hole blocking layer on a side of the electron transport layer away from the second electrode layer.

19. The method according to claim 17, after forming the second electrode layer on the isolation layer, further comprising:

forming an electron transport layer on a side of the second electrode layer and forming a hole blocking layer on a side of the electron transport layer away from the second electrode layer.

20. The method according to claim 19, wherein the light-emitting layer is formed on a side of the hole blocking layer away from the electron transport layer and on the hole transport layer.