Organic light-emitting element

Patent metadata

Field	Value
Publication number	US-2016308167-A1
Application number	US-201415101291-A
Country	US
Kind code	A1
Filing date	Dec 2, 2014
Priority date	Dec 2, 2013
Publication date	Oct 20, 2016
Grant date	—

Abstract

The present invention relates to an organic light-emitting element and, more specifically, to an organic light-emitting element having a bottom emitting structure. To this end, the present invention provides the organic light-emitting element, comprising: a substrate; a light extraction layer formed on the substrate and having an exposure part which exposes the substrate; a flat layer for covering the substrate and the light extraction layer and having a flat top surface; an anode electrode formed on the flat layer; an organic light-emitting layer formed on the anode electrode; and a cathode electrode formed on the organic light-emitting layer in the same form as the light extraction layer.

First claim

1 . An organic light-emitting diode comprising:
a substrate; a light extraction layer disposed on the substrate, the light extraction layer comprising an exposing portion through which the substrate is exposed externally; a planarization layer covering the substrate and the light extraction layer, the planarization layer having a flat top surface; an anode disposed on the planarization layer; an organic light-emitting layer disposed on the anode; and a cathode disposed on the organic light-emitting layer, a shape of the cathode being identical to a shape of the light extraction layer.

2 . The organic light-emitting diode of claim 1 , wherein the light extraction layer has at least one opening.

3 . The organic light-emitting diode of claim 2 , wherein the light extraction layer has a plurality of openings arranged in a predetermined pattern.

4 . The organic light-emitting diode of claim 3 , wherein the pattern is one selected from the group consisting of a stripe pattern, a grid pattern, a pattern of hexagonal portions, and a pattern of circular portions when the light extraction layer is viewed from vertically above.

5 . The organic light-emitting diode of claim 1 , wherein the light extraction layer comprises a plurality of light extraction sub-layers.

6 . The organic light-emitting diode of claim 5 , wherein the plurality of light extraction sub-layers are arranged in a predetermined pattern.

7 . The organic light-emitting diode of claim 5 , wherein distances between the plurality of light extraction sub-layers range from 1 μm to 1 cm.

8 . The organic light-emitting diode of claim 1 , wherein widths of the plurality of light extraction sub-layers range from 1 μm to 1 mm.

9 . The organic light-emitting diode of claim 1 , wherein a thickness of the light extraction layer ranges from 100 nm to 10 μm.

10 . The organic light-emitting diode of claim 1 , wherein a thickness of the planarization layer ranges from 100 nm to 20 μm.

11 . The organic light-emitting diode of claim 1 , wherein a thickness of the anode ranges from 50 nm to 200 nm.

12 . The organic light-emitting diode of claim 1 , wherein a thickness of the organic light-emitting layer ranges from 50 nm to 1 μm.

13 . The organic light-emitting diode of claim 1 , wherein the cathode comprises a metal thin film.

14 . The organic light-emitting diode of claim 1 , wherein a thickness of the cathode ranges from 10 nm to 500 nm.

Assignees

• Corning Prec Materials Co Ltd

Inventors

• Park Jeong Woo
• Kim Eui Soo
• Yoon hong

Classifications

• H10K2102/3023

  Direction of light emission · CPC title

• H10K50/822 Primary

  characterised by their shape · CPC title

• H10K50/85 Primary

  Arrangements for extracting light from the devices · CPC title

• H10K50/854

  comprising scattering means · CPC title

• H01L51/5268 Primary

  Electricity · mapped topic