Organic light emitting device

Patent metadata

Field	Value
Publication number	US-2019372012-A1
Application number	US-201816319203-A
Country	US
Kind code	A1
Filing date	Apr 4, 2018
Priority date	Aug 10, 2017
Publication date	Dec 5, 2019
Grant date	—

Abstract

The present invention provides an organic light emitting device comprising at least one light emitting layer which comprises a first host compound and a second host compound, and the organic light emitting device has improved driving voltage, efficiency and lifetime.

First claim

1 . An organic light emitting device comprising:
a cathode; an anode; and at least one light emitting layer interposed between the cathode and the anode, wherein the light emitting layer comprises a first host compound represented by Chemical Formula 1 below, and a second host compound represented by Chemical Formula 2 below:

in Chemical Formula 1,
X is N, or CH, with the proviso that at least one X is N,
Ar 1 and Ar 2 are each independently a substituted or unsubstituted C 6-60 aryl; or a C 2-60 heteroaryl containing N, O, or S,
each R is identical and is -L-Ar 3 ,
L is a bond; or a substituted or unsubstituted C 6-60 arylene,
Ar 3 is a substituted or unsubstituted C 6-60 aryl; or a C 2-60 heteroaryl containing N, O, or S,

in Chemical Formula 2,
Y′ is O, S, NR′, or CR′R″,
wherein R′ and R″ are each independently hydrogen; deuterium; halogen; cyano; nitro;
amino; a substituted or unsubstituted C 1-60 alkyl; a substituted or unsubstituted C 1-60 haloalkyl; a substituted or unsubstituted C 1-60 haloalkoxy; a substituted or unsubstituted C 3-60 cycloalkyl; a substituted or unsubstituted C 2-60 alkenyl; a substituted or unsubstituted C 6-60 aryl; or a substituted or unsubstituted C 2-60 heteroaryl containing at least one of O, N, Si and S, or R′ and R″ together form a substituted or unsubstituted C 6-60 aromatic ring,
L′ and L″ are each independently a single bond; a substituted or unsubstituted C 6-60 arylene; or a substituted or unsubstituted C 2-60 heteroarylene containing at least one of O, N, Si and S,
R′ 1 is a substituted or unsubstituted C 1-60 alkyl; a substituted or unsubstituted C 3-60 cycloalkyl; a substituted or unsubstituted C 6-60 aryl; or a substituted or unsubstituted C 2-60 heteroaryl containing at least one of O, N, Si and S,
R′ 2 and R′ 3 are each independently hydrogen; deuterium; halogen; cyano; a substituted or unsubstituted C 1-60 alkyl; a substituted or unsubstituted C 3-60 cycloalkyl; a substituted or unsubstituted C 6-60 aryl; or a substituted or unsubstituted C 2-60 heteroaryl containing at least one of O, N, Si and S, and
m and n are each independently an integer of 0 to 4.

2 . The organic light emitting device of claim 1 ,
wherein each X is N.

3 . The organic light emitting device of claim 1 ,
wherein Ar 1 and Ar 2 are each independently phenyl, or biphenylyl.

4 . The organic light emitting device of claim 1 ,
wherein L is a bond, phenylene, or naphthylene.

5 . The organic light emitting device of claim 1 ,
wherein Ar 3 is phenyl, cyano-substituted phenyl, biphenylyl, terphenylyl, naphthyl, phenanthrenyl, triphenylenyl, pyridinyl, dibenzofuranyl, dibenzothiophenyl, 9,9-dimethyl-9H-fluorenyl, carbazolyl, 9-phenyl-9H-carbazolyl, 9,9-dimethyl-9H-xanthenyl, or phenoxanthinyl.

6 . The organic light emitting device of claim 1 , wherein
the compound represented by Chemical Formula 1 is any one selected from the group consisting of the following:

7 . The organic light emitting device of claim 1 ,
wherein Y is O, NR′, C(CH 3 ) 2 , or

where R′ is phenyl, cyano-substituted phenyl, biphenylyl, triphenylenyl, cyclohexyl, dimethylfluorenyl, or dibenzofuranyl.

8 . The organic light emitting device of claim 1 ,
wherein L′ and L″ are single bonds.

9 . The organic light emitting device of claim 1 ,
wherein R′ 1 is phenyl, biphenylyl, terphenylyl, triphenylenyl, or phenanthrenyl.

10 . The organic light emitting device of claim 1 ,
wherein R′ 2 and R′ 3 are each independently hydrogen; phenyl; cyano-substituted phenyl; or pyridinyl.

11 . The organic light emitting device of claim 1 ,
wherein the compound represented by Chemical Formula 2 is any one selected from the group consisting of the following:

Assignees

• Lg Chemical Ltd

Inventors

• Cho Seong Mi
• Jung Min Woo
• Jeon Sang Young
• Choi Minwoo
• Jeon Hyeon Soo

Classifications

• C09K2211/1062

  with oxygen · CPC title

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• C09K2211/1088

  containing oxygen as the only heteroatom · CPC title

• H01L51/0067 Primary

  Electricity · mapped topic

• H01L51/0072

  Electricity · mapped topic