Organic electroluminescent device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-11038138-B2
Application number	US-201716317721-A
Country	US
Kind code	B2
Filing date	Aug 11, 2017
Priority date	Aug 11, 2017
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

The present specification relates to a hole injection or transfer layer or charge generation layer coating composition of an organic electroluminescent device comprising an organic metal complex comprising at least one of Mo, V, Re, Ni and Pt, and W; and an organic solvent, a method for manufacturing an organic electroluminescent device using the same, and an organic electroluminescent device.

First claim

The invention claimed is:

1. A hole injection or transfer layer or charge generation layer coating composition of an organic electroluminescent device, the coating composition comprising:
an organic metal complex comprising at least one of Mo, V, Re, Ni or Pt, and W; and
an organic solvent.

2. The hole injection or transfer layer or charge generation layer coating composition of an organic electroluminescence device of claim 1 , wherein the organic metal complex comprises an organic metal complex comprising at least one of Mo, V, Re, Ni or Pt, and an organic metal complex comprising W.

3. The hole injection or transfer layer or charge generation layer coating composition of an organic electroluminescence device of claim 1 , wherein an atomic ratio of W among the total metal atoms in the coating composition is from 10 at % to 99.9 at %.

4. The hole injection or transfer layer or charge generation layer coating composition of an organic electroluminescence device of claim 1 , wherein the organic solvent is an alcohol-based solvent.

5. The hole injection or transfer layer or charge generation layer coating composition of an organic electroluminescence device of claim 1 , wherein the organic solvent is a ketone-based solvent.

6. The hole injection or transfer layer or charge generation layer coating composition of an organic electroluminescence device of claim 1 , wherein the organic solvent comprises a solvent represented by the following General Formula 1:

in General Formula 1, n is an integer of 1 to 20, 1 and m are each independently an integer from 0 to 5, and R 1 , R 2 , R 3 and R 4 are each independently a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an aryl group having 6 to 40 carbon atoms, a heteroaryl group having 2 to 40 carbon atoms or an ester group having 1 to 20 carbon atoms.

7. The hole injection or transfer layer or charge generation layer coating composition of an organic electroluminescence device of claim 6 , wherein the organic solvent comprises at least one of ethylene glycol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monopentyl ether, ethylene glycol monohexyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dipropyl ether, ethylene glycol dibutyl ether, ethylene glycol dipentyl ether, ethylene glycol dihexyl ether, 1,2-propanediol, 1,3-propanediol, 1,4-butanediol, 1,2-butanediol, 1,3-butanediol, diethylene glycol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, diethylene dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, diethylene glycol dibutyl ether, ethylene glycol diacetate, PEG 600 or triethylene glycol.

8. A method for manufacturing an organic electroluminescent device comprising:
preparing a substrate;
forming a first electrode on the substrate;
forming at least one organic material layer on the first electrode; and
forming a second electrode on the organic material layer,
and further comprising forming a hole injection or transfer layer or a charge generation layer between the first electrode and the organic material layer, between the second electrode and the organic material layer, or, when two or more organic material layers are present, between the organic material layers through a coating method using the coating composition of claim 1 .

9. The method for manufacturing an organic electroluminescence device of claim 8 , wherein the hole injection or transfer layer or the charge generation layer formed using the coating composition has a thickness of 1 nm to 1,000 nm.

10. The method for manufacturing an organic electroluminescence device of claim 8 , further comprising annealing after the forming of a hole injection or transfer layer or a charge generation layer formed using the coating composition.

11. The method for manufacturing an organic electroluminescence device of claim 10 , wherein the annealing is carried out at a temperature of 150° C. to 250° C.

12. An organic electroluminescence device comprising:
a first electrode;
a second electrode; and
at least one organic material layers provided between the first electrode and the second electrode,
and further comprising a hole injection or transfer layer or a charge generation layer provided between the first electrode and the organic material layer, between the second electrode and the organic material layer, or, when two or more organic material layers are present, between the organic material layers, and formed using the coating composition of claim 1 .

13. An organic electroluminescence device comprising:
a first electrode;
a second electrode; and
at least one organic material layers provided between the first electrode and the second electrode,
and further comprising a hole injection or transfer layer or a charge generation layer provided between the first electrode and the organic material layer, between the second electrode and the organic material layer, or, when two or more organic material layers are present, between the organic material layers, and formed with a metal oxide comprising at least one of Mo, V, Re, Ni or Pt, and W.

14. The organic electroluminescence device of claim 12 , wherein the hole injection or transfer layer or the charge generation layer has a thickness of 1 nm to 1,000 nm.

15. The organic electroluminescence device of claim 12 , wherein the hole injection or transfer layer or the charge generation layer is annealed.

16. The organic electroluminescence device of claim 12 , wherein the hole injection or transfer layer or the charge generation layer is annealed at a temperature of 150° C. to 250° C.

17. The organic electroluminescence device of claim 12 , wherein the hole injection or transfer layer or the charge generation layer formed using the coating composition is formed with a metal oxide comprising at least one of Mo, V, Re, Ni or Pt, and W.

18. The organic electroluminescence device of claim 12 , wherein an atomic ratio of W among the total metal atoms in the hole injection or transfer layer or the charge generation layer is from 10 at % to 99.9 at %.

19. The organic electroluminescence device of claim 12 , wherein the hole injection or transfer layer or the charge generation layer is formed with WxMyOz, wherein M is Mo, V, Re, Ni or Pt, 0<x+y≤100, 0<z≤400, 50≤x≤99.99 and 0.01≤y≤50.

20. The organic electroluminescence device of claim 12 , wherein the hole injection or transfer layer or the charge generation layer comprises an M-O bond and an M-M bond, or comprises MO 3 and M 2 O 5 , or forms an M-O—X bond with an interface of an adjoining electrode among the first electrode and the second electrode, wherein M is Mo, V, Re, Ni, Pt or W, and X is one of elements forming the adjoining electrode among the first electrode and the second electrode.

Assignees

• Lg Chemical Ltd

Inventors

• Yoon Seokhee
• Lee Jaechol
• Lee Donggu
• Kim Hwakyung
• Bae Jaesoon
• Jeong Jae Hak
• Shin Jiyeon

Classifications

• H10K50/17

  Carrier injection layers · CPC title

• H10K50/171

  Electron injection layers · CPC title

• H10K85/30 Primary

  Coordination compounds · CPC title

• H01L51/5221

  Electricity · mapped topic

• H01L51/0007

  Electricity · mapped topic