Organic light emitting diode device

Patent metadata

Field	Value
Publication number	US-9806296-B2
Application number	US-201514789652-A
Country	US
Kind code	B2
Filing date	Jul 1, 2015
Priority date	Oct 24, 2014
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

An organic light emitting diode device includes: a first substrate; a first electrode on the first substrate; an organic light emitting layer on the first electrode; a second electrode on the organic light emitting layer; and a capping layer on the second electrode. The capping layer may include at least one high refractive-index layer and at least two low refractive-index layers having thicknesses different from each other.

First claim

What is claimed is:

1. An organic light emitting diode device comprising:
a first substrate;
a first electrode on the first substrate;
an organic light emitting layer on the first electrode;
a second electrode on the organic light emitting layer; and
a capping layer on the second electrode; the capping layer including a first high refractive-index layer, a first low refractive-index layer, and a second low refractive-index layer, wherein
the first high refractive-index layer has a thickness greater than the first low refractive-index layer, and
the first low refractive-index layer has a thickness greater than the second low refractive-index layer,
wherein the first high refractive-index layer has a refractive index of about 1.8 to 2.5.

2. The organic light emitting diode device as claimed in claim 1 , wherein the first low refractive-index layer, the first high refractive-index layer, and the second low refractive-index layer are sequentially stacked on the second electrode.

3. The organic light emitting diode device as claimed in claim 1 , wherein
the first low refractive-index layer and the second low refractive-index layer have a refractive index of about 1.3 to 1.75.

4. The organic light emitting diode device as claimed in claim 1 , wherein:
the first high refractive-index layer has a thickness of about 10 to 100 nm, and
the first low refractive-index layer and the second low refractive-index layer have a thickness of about 5 to 30 nm.

5. The organic light emitting diode device as claimed in claim 1 , wherein the capping layer includes a second high refractive-index layer and a third low refractive-index layer.

6. The organic light emitting diode device as claimed in claim 5 , wherein the first low refractive-index layer, the first high refractive-index layer, the second low refractive-index layer, the second high refractive-index layer, and the third low refractive-index layer are sequentially stacked on the second electrode.

7. The organic light emitting diode device as claimed in claim 6 , wherein:
the first low refractive-index layer has a thickness greater than those of the second low refractive-index layer and the third low refractive-index layer, and
the second low refractive-index layer has a thickness greater than that of the third low refractive-index layer.

8. The organic light emitting diode device as claimed in claim 5 , wherein:
the first high refractive-index layer and the second high refractive-index layer have a refractive index of about 1.8 to 2.5, and
the first to third low refractive-index layers have a refractive index of about 1.3 to 1.75.

9. The organic light emitting diode device as claimed in claim 5 , wherein:
the first high refractive-index layer and the second high refractive-index layer have a thickness of about 10 to 100 nm, and
the first to third low refractive-index layers have a thickness of about 5 to 30 nm.

10. The organic light emitting diode device as claimed in claim 1 , further comprising a second substrate opposed to the first substrate.

11. The organic light emitting diode device as claimed in claim 10 , further having a space between the capping layer and the second substrate.

12. The organic light emitting diode device as claimed in claim 11 , wherein the space is filled with a gas having a refractive index lower than a refractive index of an uppermost layer of the capping layer.

13. The organic light emitting diode device as claimed in claim 12 , wherein the gas is air.

14. The organic light emitting diode device as claimed in claim 10 , further comprising a filling member between the capping layer and the second substrate.

15. The organic light emitting diode device as claimed in claim 14 , wherein the filling member has a refractive index that matches that of the second substrate.

16. The organic light emitting diode device as claimed in claim 1 , wherein the first and second low refractive-index layers have a same refractive index.

17. The organic light emitting diode device as claimed in claim 1 , wherein the first high refractive-index layer is thicker than either of the first and second low refractive-index layers.

Assignees

• Samsung Display Co Ltd

Inventors

• Kang Namsu
• Shim Jihye
• Yoon Jihwan

Classifications

• H01L51/5012

  Electricity · mapped topic

• H01L51/5275 Primary

  Electricity · mapped topic

• H01L51/524

  Electricity · mapped topic

• H01L2251/558

  Electricity · mapped topic

• H10K59/879 Primary

  comprising refractive means, e.g. lenses · CPC title