Organometallic compound and organic light-emitting device including the same

Patent metadata

Field	Value
Publication number	US-10256418-B2
Application number	US-201514599792-A
Country	US
Kind code	B2
Filing date	Jan 19, 2015
Priority date	May 16, 2014
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

An organometallic compound represented by Formula 1:

M(L 1 ) n1 (L 2 ) n2   Formula 1

wherein in Formula 1, M, L 1 , L 2 , n1, and n2 are defined in the detailed description.

First claim

What is claimed is:

1. An organic light-emitting device comprising:
a first electrode;
a second electrode; and
an organic layer disposed between the first electrode and the second electrode,
wherein the organic layer comprises an emission layer, and further comprises at least one organometallic compound represented by Formula 1:
M(L 1 ) n1 (L 2 ) n2   Formula 1

wherein in Formula 1,
M is Ir;
L 1 is selected from ligands represented by Formulae 2A, 2C, and 2D;
L 2 is selected from ligands represented by Formulae 3-1 and 3-2, and is different from L 1 ;
n1 is 1, 2, or 3;
n2 is 0, 1, or 2;
when n1 is two or more, ligands L 1 are identical or different, and when n2 is two or more, L 2 are identical or different;

wherein in Formulae 2A, 2C, and 2D,
R 1 to R 4 are each hydrogen,
R 5 to R 7 are each independently selected from an isobutyl group and a phenyl group; and
*and*′ each indicates a binding site to M in Formula 1;

wherein in Formulae 3-1 and 3-2,
Z 1 is hydrogen, Z 2 is —F,
a4 is 4;
b4 is 2;
b3 is 2;
and
*and* 1 each indicates a binding site to M in Formula 1.

2. The organic light-emitting device of claim 1 , wherein
the first electrode is an anode,
the second electrode is a cathode, and
the organic layer comprises
i) a hole transport region disposed between the first electrode and the emission layer, wherein the hole transport region comprises at least one of a hole injection layer, a hole transport layer, and an electron blocking layer, and
ii) an electron transport region disposed between the emission layer and the second electrode, wherein the electron transport region comprises at least one selected from a hole blocking layer, an electron transport layer, and an electron injection layer.

3. The organic light-emitting device of claim 2 , wherein
the emission layer comprises the organometallic compound of claim 1 and a host,
wherein an amount of the organometallic compound in the emission layer is smaller than an amount of the host.

4. An organic light-emitting device comprising:
a first electrode;
a second electrode; and
an organic layer disposed between the first electrode and the second electrode wherein
the organometallic compound is one of Compounds 1 to 7:

Assignees

• Samsung Electronics Co Ltd
• Samsung Sdi Co Ltd

Inventors

• Kim Wook
• Chae Miyoung
• Huh Dalho
• Kim Hyunjung
• Lee Kangmun
• Lee Namheon

Classifications

• H01L51/0085 Primary

  Electricity · mapped topic

• H01L51/5084

  Electricity · mapped topic

• H01L51/5016

  Electricity · mapped topic

• H01L51/5012

  Electricity · mapped topic

• H01L51/5068

  Electricity · mapped topic