Organic light emitting display and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9722001-B2
Application number	US-201514712190-A
Country	US
Kind code	B2
Filing date	May 14, 2015
Priority date	Dec 9, 2014
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

An organic light emitting display including a substrate, a first electrode and a second electrode on the substrate and facing each other, at least two organic light emitting layers between the first electrode and the second electrode, and at least two color filters on the second electrode, the organic light emitting layers emitting a first color light, and the color filters emitting a second color light and a third color light.

First claim

What is claimed is:

1. An organic light emitting display, comprising:
a substrate;
a first electrode and a second electrode above the substrate and facing each other;
at least two organic light emitting layers between the first electrode and the second electrode; and
at least two color filters on the second electrode,
the organic light emitting layers each emitting a same first color light, and the color filters emitting a second color light and a third color light, wherein:
the organic light emitting layers are laminated on each other.

2. The organic light emitting display as claimed in claim 1 , wherein the first color light is blue light.

3. The organic light emitting display as claimed in claim 1 , wherein the color filters include a quantum dot material.

4. The organic light emitting display as claimed in claim 3 , wherein:
the color filters include a first color filter and a second color filter, and
the first color filter emits the second color light, and the second color filter emits the third color light.

5. The organic light emitting display as claimed in claim 4 , wherein the second color light is green light and the third color light is red light.

6. The organic light emitting display as claimed in claim 3 , wherein:
each of the color filters includes a first region adjacent to the second electrode and a second region, and
the quantum dot material is in the second region.

7. The organic light emitting display as claimed in claim 1 , further comprising a charge generating layer between the at least two organic light emitting layers.

8. The organic light emitting display as claimed in claim 7 , wherein the charge generating layer includes an n-type charge generating layer and a p-type charge generating layer.

9. The organic light emitting display as claimed in claim 8 , wherein the n-type charge generating layer is adjacent to the first electrode, and the p-type charge generating layer is adjacent to the second electrode.

10. The organic light emitting display as claimed in claim 1 , wherein the first electrode is an anode, and the second electrode is a cathode.

11. The organic light emitting display as claimed in claim 1 , wherein the organic light emitting layers include a soluble material.

12. The organic light emitting display as claimed in claim 1 , further comprising an n-type charge generating layer between the second electrode and the light emitting layers.

13. The organic light emitting display as claimed in claim 1 , further comprising a sealing substrate sealing the organic light emitting display,
wherein the color filters are between the sealing substrate and the second electrode.

14. The organic light emitting display as claimed in claim 13 , wherein:
the sealing substrate includes a transparent material, and
light emitted from the organic light emitting layers is emitted through the sealing substrate.

15. An organic light emitting display, comprising:
a substrate;
a first electrode and a second electrode above the substrate and facing each other;
at least two organic light emitting layers between the first electrode and the second electrode;
at least two color filters on the second electrode; and
a buffer layer between the second electrode and the light emitting layers,
wherein the organic light emitting layers emit a first color light and the color filters emit a second color light and a third color light, and
wherein the buffer layer includes one or more of WO 3 , MoO x , or hexaazatriphenylenehexacarbonitrile (HATCN).

16. A manufacturing method of an organic light emitting display, comprising:
forming a first electrode above a substrate;
forming at least two organic light emitting layers above the first electrode with a charge generating layer between the organic light emitting layers; and
forming a second electrode above the at least two organic light emitting layers,
the organic light emitting layers being formed using a soluble material, wherein:
the organic light emitting layers each emit a same color light, and
the organic light emitting layers are laminated on each other.

17. The manufacturing method as claimed in claim 16 , further comprising one or more of:
forming one or more of a hole injection layer or a hole transport layer between the first electrode and the organic light emitting layers to supply holes generated from the first electrode to the organic light emitting layers; or
forming one or more of an electron injection layer or an electron transport layer between the second electrode and the organic light emitting layers to supply electrons generated from the second electrode to the organic light emitting layers.

18. The manufacturing method as claimed in claim 16 , wherein the organic light emitting layers are formed under conditions of atmospheric pressure.

19. The manufacturing method as claimed in claim 16 , further comprising forming a buffer layer including one or more of WO 3 , MoO x , or 1,4,5,8,9, 11-hexaazatriphenylenehexacarbonitrile (HATCN) below the second electrode.

20. The manufacturing method as claimed in claim 16 , further comprising:
preparing a sealing substrate on which at least two color filters including a quantum dot material are formed; and
laminating the substrate and the sealing substrate with the at least two color filters facing the second electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• Song Ok Keun
• Lee Sung Soo

Classifications

• H01L27/322 Primary

  Electricity · mapped topic

• H01L51/0067

  Electricity · mapped topic

• H01L51/5036

  Electricity · mapped topic

• H01L2251/303

  Electricity · mapped topic

• H01L2251/5369

  Electricity · mapped topic