Organic light emitting diode, organic light emitting display panel including the same, and method of manufacturing the organic light emitting display panel

Patent metadata

Field	Value
Publication number	US-9112177-B2
Application number	US-201313946925-A
Country	US
Kind code	B2
Filing date	Jul 19, 2013
Priority date	Mar 22, 2013
Publication date	Aug 18, 2015
Grant date	Aug 18, 2015

Abstract

Provided are an organic light emitting diode, an organic light emitting display panel including the same, and a method of manufacturing the organic light emitting display panel. The organic light emitting diode includes: an anode electrode on a substrate; a first common layer on the anode electrode to inject or transport holes and having a non-flat side; an organic light emitting layer on the first common layer; a planarization layer on the non-flat side of the first common layer, providing a flat side to the organic light emitting layer, transporting holes from the first common layer to the organic light emitting layer, and including perfluorocyclobutanes (PFCBs); and a cathode electrode on the organic light emitting layer.

First claim

What is claimed is:

1. An organic light emitting diode comprising:
an anode electrode on a substrate;
a first common layer on the anode electrode, the first common layer being configured to inject or transport holes and having a non-flat side;
an organic light emitting layer on the first common layer;
a planarization layer on the non-flat side of the first common layer, having a flat side facing the organic light emitting layer, the planarization layer being configured to transport holes from the first common layer to the organic light emitting layer, and comprising perfluorocyclobutanes (PFCBs); and
a cathode, electrode on the organic light emitting layer.

2. The organic light emitting diode of claim 1 , wherein the first common layer comprises at least one of a hole injection layer and a hole transport layer.

3. The organic light emitting diode of claim 1 , wherein the first common layer comprises:
a hole injection layer;
a charge generation layer; and
a hole transport layer,
wherein the hole injection layer, the charge generation layer, and the hole transport layer are stacked sequentially, and
wherein the charge generation layer has a first polarity and the hole transport layer has a second polarity different from the first polarity.

4. The organic light emitting diode of claim 1 , further comprising a second common layer between the organic light emitting layer and the cathode electrode and configured to inject or transport electrons from the cathode electrode to the organic light emitting layer.

5. The organic light emitting diode of claim 4 , wherein the second common layer comprises at least one of an electron injection layer and an electron transport layer.

6. An organic light emitting display panel comprising:
a substrate;
an anode electrode on the substrate;
a hole injection layer on the anode electrode;
a pixel definition layer on the hole injection layer, the pixel definition layer having an opening exposing a portion of the hole injection layer overlapping the anode electrode of the hole injection layer;
a hole transport layer on the exposed hole injection layer, the hole transport layer having a non-flat side;
an organic light emitting layer on the hole transport layer;
a planarization layer on the non-flat side of the hole transport layer, the planarization layer having a flat side facing the organic light emitting layer, the planarization layer being configured to transport holes from the hole transport layer to the organic light emitting layer, and the planarization layer comprising perfluorocyclobutanes (PFCBs); and
a cathode electrode on the organic light emitting layer.

7. The organic light emitting display panel of claim 6 , further comprising a residue on the hole injection layer and overlapping a portion of the hole injection layer.

8. The organic light emitting display panel of claim 7 , wherein the non-flat side of the hole transport layer has an uneven surface in an area corresponding to the residue.

9. The organic light emitting display panel of claim 8 , wherein the residue is formed of the same material as the pixel definition layer.

10. The organic light emitting display panel of claim 9 , wherein the residue protrudes from the pixel definition layer into the opening exposing the exposed portion of the hole injection layer.

11. The organic light emitting display panel of claim 6 , further comprising a charge generation layer between the hole injection layer and the hole transport layer, and the charge generation layer having a different polarity from the hole transport layer.

12. The organic light emitting display panel of claim 11 , wherein one or more portions of the non-flat side are convex.

13. The organic light emitting display panel of claim 6 , further comprising an electron injection layer disposed between the organic light emitting layer and the cathode electrode.

14. The organic light emitting display panel of claim 13 , further comprising an electron transport layer disposed between the electron injection layer and the organic light emitting layer.

15. The organic light emitting display panel of claim 6 , wherein the pixel definition layer comprises a photosensitive material.

Assignees

• Samsung Display Co Ltd

Inventors

• Shim Woo Sub
• An Byung Seon

Classifications

• H10K59/805

  Electrodes · CPC title

• H10K50/17

  Carrier injection layers · CPC title

• H10K50/805

  Electrodes · CPC title

• H10K50/167 Primary

  between the light-emitting layer and the anode · CPC title

• H01L51/5203 Primary

  Electricity · mapped topic