Organic light emitting diode display having an organic layer that includes layers of varied thicknesses

Patent metadata

Field	Value
Publication number	US-9711746-B2
Application number	US-201514692638-A
Country	US
Kind code	B2
Filing date	Apr 21, 2015
Priority date	Nov 7, 2014
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

An organic light emitting diode display includes: a substrate; and a plurality of red organic light emitting diodes, green organic light emitting diodes, and blue organic light emitting diodes on the substrate, each of the plurality of red organic light emitting diodes, green organic light emitting diodes, and blue organic light emitting diodes including: a first electrode on the substrate; an organic layer on the first electrode; and a second electrode on the organic layer, and the organic layer includes a light emission auxiliary layer on the first electrode and an organic light emitting layer on the light emission auxiliary layer, and the organic layer of each of the red organic light emitting diodes has a thickness of about 90 to 110 nm.

First claim

What is claimed is:

1. An organic light emitting diode display comprising:
a substrate; and
a plurality of organic light emitting diodes comprising red organic light emitting diodes, green organic light emitting diodes, and blue organic light emitting diodes on the substrate, each of the red organic light emitting diodes, green organic light emitting diodes, and blue organic light emitting diodes comprising:
a first electrode on the substrate;
an organic layer on the first electrode; and
a second electrode on the organic layer,
wherein the organic layer comprises a light emission auxiliary layer on the first electrode, an organic light emitting layer on the light emission auxiliary layer, and at least one of a hole transport layer and a hole injection layer between the first electrode and the light emission auxiliary layer, and the light emission auxiliary layer is configured to transport holes to the organic light emitting layer,
wherein the second electrodes of at least one of the red organic light emitting diodes, at least one of the green organic light emitting diodes, and at least one of the blue organic light emitting diodes are all integrally laminated as one continuous layer,
wherein the organic layer of each of the red organic light emitting diodes has a thickness of 90 to 110 nm, and
wherein a distance between an upper surface of a reflective layer of the first electrode and a lower surface of the second electrode in each of the red organic light emitting diodes corresponds to a first resonance of red light inside each of the red organic light emitting diodes.

2. The organic light emitting diode display of claim 1 , wherein the light emission auxiliary layer of each of the red organic light emitting diodes has a thickness of 2 to 10 nm.

3. The organic light emitting diode display of claim 2 , wherein the organic light emitting layer of each of the red organic light emitting diodes has a thickness of 30 to 40 nm.

4. The organic light emitting diode display of claim 1 , wherein the light emission auxiliary layer of each of the green organic light emitting diodes has a thickness of 100 to 120 nm.

5. The organic light emitting diode display of claim 4 , wherein the organic light emitting layer of each of the green organic light emitting diodes has a thickness of 30 to 40 nm.

6. The organic light emitting diode display of claim 1 , wherein the light emission auxiliary layer of each of the blue organic light emitting diodes has a thickness of 80 to 100 nm.

7. The organic light emitting diode display of claim 6 , wherein the organic light emitting layer of each of the blue organic light emitting diodes has a thickness of 20 to 30 nm.

8. The organic light emitting diode display of claim 1 , wherein the hole transport layer has a thickness of 30 to 40 nm.

9. The organic light emitting diode display of claim 1 , wherein the organic layer further comprises at least one of an electron transport layer and an electron injection layer between the organic light emitting layer and the second electrode.

10. The organic light emitting diode display of claim 1 , further comprising a capping layer on the second electrode.

11. The organic light emitting diode display of claim 10 , wherein the capping layer has a thickness of 70 to 120 nm.

12. The organic light emitting diode display of claim 1 , wherein the organic layer of each of the green organic light emitting diodes has a thickness of 80 to 100 nm.

13. The organic light emitting diode display of claim 12 , wherein the light emission auxiliary layer of each of the green organic light emitting diodes has a thickness of 10 to 20 nm.

14. The organic light emitting diode display of claim 12 , wherein the organic light emitting layer of each of the green organic light emitting diodes has a thickness of 30 to 40 nm.

15. The organic light emitting diode display of claim 14 , wherein the organic layer further comprises a hole transport layer between the first electrode and the light emission auxiliary layer, the hole transport layer having a thickness of 10 to 20 nm.

16. The organic light emitting diode display of claim 1 , wherein the organic layer of each of the blue organic light emitting diodes has a thickness of 60 to 70 nm.

17. The organic light emitting diode display of claim 16 , wherein the light emission auxiliary layer of each of the blue organic light emitting diodes has a thickness of 2 to 10 nm.

18. The organic light emitting diode display of claim 16 , wherein the organic light emitting layer of each of the blue organic light emitting diodes has a thickness of 10 to 20 nm.

19. The organic light emitting diode display of claim 16 , wherein the organic layer further comprises a hole transport layer between the first electrode and the light emission auxiliary layer, the hole transport layer having a thickness of 10 to 20 nm.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Changmin
• Choi Hyunju
• Yoon Jihwan

Classifications

• H01L51/5024

  Electricity · mapped topic

• H01L27/3218

  Electricity · mapped topic

• H01L27/3216

  Electricity · mapped topic

• H01L51/5036 Primary

  Electricity · mapped topic

• H01L51/5072

  Electricity · mapped topic