Organic light emitting diode with light extracting layer

Patent metadata

Field	Value
Publication number	US-9366787-B2
Application number	US-201414198980-A
Country	US
Kind code	B2
Filing date	Mar 6, 2014
Priority date	Mar 12, 2013
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A light extraction substrate includes a glass substrate having a first surface and a second surface. A light extraction layer is formed on at least one of the surfaces. The light extraction layer is a coating, such as a silicon-containing coating, incorporating nanoparticles.

First claim

What is claimed is:

1. A light extraction substrate, comprising:
a substrate having a first surface and a second surface;
a light extraction layer over at least a portion of the first or second surface, the light extraction layer comprising a coating including nanoparticles,
wherein the light extraction layer has an average surface roughness in the range of 50 nanometers to 500 nanometers, and
wherein the substrate with the light extraction layer has haze in the range of 10% to 50%.

2. The light extraction substrate of claim 1 , wherein the substrate comprises glass.

3. The light extraction substrate of claim 1 , wherein the nanoparticles are selected from the group consisting of silver oxide, alumina, titania, cerium oxide, zinc oxide, tin oxide, silica, fumed silica, zirconia, and combinations thereof.

4. The light extraction substrate of claim 1 , wherein the light extraction layer has a thickness in the range of 100 nm to 4,000 nm.

5. The light extraction substrate of claim 1 , including an anode located on the light extraction layer.

6. The light extraction substrate of claim 5 , wherein the light extraction layer has a refractive index between the refractive index of the anode and refractive index of the substrate.

7. The light extraction substrate of claim 1 , wherein the coating comprises a silicon-containing coating material.

8. The substrate of claim 1 , wherein the coating is a polymeric coating.

9. A light emitting device, comprising:
a glass substrate having a first surface and a second surface;
a light extraction layer spin deposited over at least a portion of the first surface, the light extraction layer comprising a silicon-containing coating including nanoparticles;
an anode over at least a portion of the light extraction layer;
a light emissive layer over at least a portion of the anode; and
a cathode over at least a portion of the light emissive layer,
wherein the light extraction layer has a refractive index between the refractive index of the anode and refractive index of the glass substrate, and
wherein the substrate with the light extraction layer has haze in the range of 10% to 50%.

10. The light emitting device of claim 9 , wherein the light extraction layer is located between the substrate and the emissive layer.

11. The light emitting device of claim 9 , wherein the light extraction layer is located between the substrate and the anode.

12. The light emitting device of claim 9 , wherein the nanoparticles are selected from the group consisting of silver oxide, alumina, titania, cerium oxide, zinc oxide, tin oxide, silica, fumed silica, zirconia, and combinations thereof.

13. The light emitting device of claim 9 , wherein the light extraction layer has a thickness in the range of 100 nm to 4,000 nm.

14. The light emitting device of claim 9 , wherein the light extraction layer has an average surface roughness in the range of 50 nanometers to 500 nanometers.

15. A light emitting device comprising
a glass substrate having a first surface and a second surface;
a light extraction layer spin deposited over at least a portion of the first surface, the light extraction layer comprising a silicon-containing coating including nanoparticles;
an anode over at least a portion of the light extraction layer;
a light emissive layer over at least a portion of the anode; and
a cathode over at least a portion of the light emissive layer,
wherein the light extraction layer has an average surface roughness in the range of 50 nanometers to 500 nanometers, and
wherein the substrate with the light extraction layer has haze in the range of 10% to 50%.

16. A light emitting device comprising
a glass substrate having a first surface and a second surface;
a light extraction layer spin deposited over at least a portion of the first surface,
the light extraction layer comprising a silicon-containing coating including nanoparticles;
an anode over at least a portion of the light extraction layer;
a light emissive layer over at least a portion of the anode; and
a cathode over at least a portion of the light emissive layer,
wherein the coating comprises a polymeric organosilane material.

17. A light extraction substrate, comprising:
a substrate having a first surface and a second surface;
a light extraction layer over at least a portion of the first or second surface, the light extraction layer comprising a coating including nanoparticles; and
an anode located on the light extraction layer,
wherein the light extraction layer has a refractive index between the refractive index of the anode and refractive index of the substrate, and
wherein the substrate with the light extraction layer has haze in the range of 10% to 50%.

Assignees

• Ppg Ind Ohio Inc

Inventors

• Lu Songwei

Classifications

• Y10T428/26

  Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension · CPC title

• H01L2251/5369

  Electricity · mapped topic

• Y10T428/268

  Monolayer with structurally defined element · CPC title

• G02B5/0278

  used in transmission · CPC title

• Y02E10/549

  Organic PV cells · CPC title