P-type dopant and organic light emitting diode

Patent metadata

Field	Value
Publication number	US-11871663-B2
Application number	US-202017053196-A
Country	US
Kind code	B2
Filing date	Feb 14, 2020
Priority date	Nov 25, 2019
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

A P-type dopant is provided, which is a planar aromatic compound having different numbers of fluorine atoms and cyano groups connected at a periphery thereof, and allows adjustment of highest occupied molecular orbital (HOMO) energy levels and lowest unoccupied molecular orbital (LUMO) energy levels and effectively increases luminous efficiency of a light emitting layer. Moreover, an organic light emitting diode is disclosed, including an anode, a cathode, and a light emitting structure located between the anode and the cathode, wherein a hole injecting layer of the light emitting structure is a hole injecting layer including the P-type dopant described above.

First claim

What is claimed is:

1. A P-type dopant, wherein the P-type dopant is a planar aromatic compound comprising different numbers of fluorine atoms and cyano groups connected at a periphery, and has a following structural formula:

2. The P-type dopant according to claim 1 , wherein the P-type dopant has a following structural formula:

3. The P-type dopant according to claim 2 , wherein the P-type dopant has the following structural formula:

and is synthesized by a following synthesis route:

4. The P-type dopant according to claim 2 , wherein the P-type dopant has the following structural formula:

and is synthesized by a following synthesis route:

5. The P-type dopant according to claim 2 , wherein the P-type dopant has the following structural formula:

and is synthesized by a following synthesis route:

6. An organic light emitting diode, wherein a material of a hole injecting layer in the organic light emitting diode is a hole injecting material comprising a P-type dopant, and the P-type dopant is a planar aromatic compound comprising different numbers of fluorine atoms and cyano groups connected at a periphery, and has a following structural formula:

7. The organic light emitting diode according to claim 6 , wherein the P-type dopant has the following structural formula:

8. The organic light emitting diode according to claim 7 , wherein the P-type dopant has the following structural formula:

and is synthesized by a following synthesis route:

9. The organic light emitting diode according to claim 7 , wherein the P-type dopant has the following structural formula:

and is synthesized by a following synthesis route:

10. The organic light emitting diode according to claim 7 , wherein the P-type dopant has the following structural formula:

and is synthesized by a following synthesis route:

11. The organic light emitting diode according to claim 6 , wherein the organic light emitting diode further comprises an anode, a cathode, and a light emitting structure located between the anode and the cathode, wherein the light emitting structure comprises the hole injecting layer according to claim 6 .

12. The organic light emitting diode according to claim 11 , wherein the light emitting structure comprises the hole injecting layer, a hole transporting layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transporting layer, and an electron injecting layer which are sequentially formed.

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Luo Jiajia

Classifications

• H10K50/17

  Carrier injection layers · CPC title

• H10K85/6572 Primary

  comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole · CPC title

• C07D241/46 Primary

  Phenazines · CPC title

• C07C255/34

  with cyano groups linked to the six-membered aromatic ring, or to the condensed ring system containing that ring, by unsaturated carbon chains · CPC title

• C07C255/56

  containing cyano groups and doubly-bound oxygen atoms bound to the carbon skeleton · CPC title