Organic light emitting device

Patent metadata

Field	Value
Publication number	US-12507589-B2
Application number	US-201917042812-A
Country	US
Kind code	B2
Filing date	Sep 4, 2019
Priority date	Sep 4, 2018
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

An organic light emitting device having improved driving voltage, efficiency and lifetime, the organic light emitting device having an anode, a cathode, and a light emitting layer disposed between the anode and the cathode, wherein the light emitting layer includes a compound of the following Chemical Formula 1, and a compound of the following Chemical Formula 2:

First claim

The invention claimed is:

1 . An organic light emitting device comprising:
an anode; a cathode; and a light emitting layer disposed between the anode and the cathode; wherein the light emitting layer includes a compound of the following Chemical Formula 1-1 and a compound of the following Chemical Formula 2 co-deposited in a weight ratio from 5:5 to 7:3 in combination with a dopant material that includes an iridium complex:

wherein in Chemical Formula 1-1:
L 1 and L 2 are each a single bond, and l is 1;
X 1 is any one selected from among the following:

R 1 and R 2 are each hydrogen, and n and m are 4; and
Ar 1 s a phenyl or biphenyl;

wherein in Chemical Formula 2:
L 3 is a single bond or phenylene, and L 4 is a single bond;
o is 1;
X 2 is O or S;
A is

Y 1 , Y 2 and Y 3 are each independently N or CH, with the proviso that at least two of Y 1 , Y 2 and Y 3 are N; and
a) Ar 2 is phenyl, and Ar 3 is biphenyl; or
b) Ar 2 is phenyl or biphenyl, and Ar 3 is terphenylyl, triphenylenyl, diphenylfluorenyl, carbazolyl, phenylcarbazolyl, dibenzofuranyl, dibenzothiophenyl, phenyl substituted with carbazole, phenyl substituted with dibenzofuranyl, phenyl substituted with dibenzothiophenyl, or phenyl substituted with benzothiazolyl.

2 . The organic light emitting device according to claim 1 , wherein the compound of Chemical Formula 1-1 is any one compound selected from among the following compounds:

3 . The organic light emitting device according to claim 1 , wherein Chemical Formula 2 is the following Chemical Formula 2-1 to Chemical Formula 2-4:

wherein in Chemical Formula 2-1 to Chemical Formula 2-4,
L 3 , L 4 , X 2 , A, Y 1 , Y 2 , Y 3 , Ar 2 and Ar 3 are as defined in claim 1 .

4 . The organic light emitting device according to claim 1 , wherein the compound of Chemical Formula 2 is any one compound selected from among the following compounds:

5 . The organic light emitting device according to claim 1 , wherein the dopant material is co-deposited in an amount of 6%-12% based on the total weight of the light emitting layer.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Jungha
• Jung Min Woo
• Han Su Jin
• Park Seulchan
• Lee Dong Hoon
• Jang Boon Jae

Classifications

• H10K50/11

  characterised by the electroluminescent [EL] layers · CPC title

• H10K85/6576

  comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene · CPC title

• H10K85/6574

  comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes · CPC title

• H10K85/656

  comprising two or more different heteroatoms per ring (H10K85/652 takes precedence) · CPC title

• H10K85/654

  comprising only nitrogen as heteroatom (H10K85/652 takes precedence) · CPC title