Display panel, organic light emitting diode and method for manufacturing the same

• US 10,243,142 B2
• Filed: 01/07/2016
• Issued: 03/26/2019
• Est. Priority Date: 09/11/2015
• Status: Active Grant

• Current Assignee: Tianma Microelectronics Company Limited, Wuhan Tianma Micro-Electronics Company Limited (Wuhan Donghu New Technology Development Zone Production Promotion Centre), Wuhan Tianma Microelectronics Company Limited Shanghai Branch
• Original Assignee: Shanghai Tianma AM-OLED Co. Ltd (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Inventors: Xie, Zaifeng
• Primary Examiner(s): Mowla, Golam
• Application Number:
  US14/990,335
• Publication Number:
  US 20170077406A1
• Time in Patent Office: 1,174 Days
• CPC Class Codes: H10K 2101/30 Highest occupied molecular orbital [HOMO], lowest unoccupied molecular orbital [LUMO] or Fermi energy values
• CPC Class Codes: H10K 2101/40 Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers
• CPC Class Codes: H10K 2102/331 Nanoparticles used in non-emissive layers, e.g. in packaging layer
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/16 Electron transporting layers
• CPC Class Codes: H10K 50/166 comprising a multilayered structure
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 85/20 Carbon compounds, e.g. carbon nanotubes or fullerenes
• CPC Class Codes: H10K 85/221 Carbon nanotubes

Abstract

A display panel, a polymer light emitting diode and a method for manufacturing the same are provided. The polymer light emitting diode includes: an organic light emitting layer having a first surface and a second surface opposite to each other; a hole transport part formed on the first surface of the organic light emitting layer; and an electron transport part formed on the second surface of the organic light emitting layer, the electron transport part including a nanocomposite layer.

Claims

1. An organic light emitting diode comprising:

an organic light emitting layer having a first surface and a second surface opposite to each other;

a hole transport part formed on the first surface of the organic light emitting layer, comprising an anode, a hole injection layer and a hole transport layer stacked sequentially; and

an electron transport part formed on the second surface of the organic light emitting layer, the electron transport part comprising a nanocomposite layer and a cathode formed on the nanocomposite layer,

wherein the nanocomposite layer comprises graphene and metalloid oxide.

2. The organic light emitting diode of claim 1, wherein the metalloid in the metalloid oxide is selected from IIIA group, IVA group, VA group, and VIA group.

3. The organic light emitting diode of claim 1, wherein the organic light emitting diode is a polymer light emitting diode.

7. An organic light emitting display panel comprising:

a first substrate;

a second substrate provided opposite to the first substrate;

an organic light emitting diode according to claim 1 provided between the first substrate and the second substrate; and

a seal member provided around the organic light emitting diode and configured to package the organic light emitting diode between the first substrate and the second substrate.

8. The organic light emitting diode of claim 1, wherein the metalloid oxide comprises Ge₂O₅ or As₂O₅.

4. A method for manufacturing an organic light emitting diode comprising:

forming a hole transport part configured to provide hole carriers;

forming an organic light emitting layer having a first surface and a second surface opposite to each other, the hole transport part being formed on the first surface of the organic light emitting layer and comprising an anode, a hole injection layer and a hole transport layer stacked sequentially; and

forming an electron transport part on the second surface of the organic light emitting layer, the electron transport part comprising a nanocomposite layer and a cathode formed on the nanocomposite layer,

wherein the nanocomposite layer comprises graphene and metalloid oxide.

5. The method of claim 4, wherein the nanocomposite layer comprises:

an electron rich carrier, and

a nanoparticle film, comprising transition metal oxide or metalloid oxide, anchored to the electron rich carrier.

6. The method of claim 5, wherein the forming the electron transport part comprises:

preparing the nanocomposite layer by means of solution process, and

forming material of the nanocomposite layer on the organic light emitting layer by a method selected from a spin coating process and an inkjet printing process.