Organic compound and organic electroluminescent device comprising the same

Patent metadata

Field	Value
Publication number	US-11744145-B2
Application number	US-201916674966-A
Country	US
Kind code	B2
Filing date	Nov 5, 2019
Priority date	Nov 5, 2018
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

Disclosed is an organic electroluminescent device with lowered driving voltage, and enhanced efficiency and lifetime.

First claim

The invention claimed is:

1. An organic electroluminescent device, comprising:
an anode;
a cathode; and
at least one organic layer between the anode and the cathode, the at least one organic layer including:
a light emitting layer; and
an organic layer disposed between the anode and the light emitting layer and including a compound represented by the following Chemical Formula 1:

wherein:
each of L 1 and L 2 is independently selected from the group consisting of a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C3 to C30 heteroarylene group, a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C3 to C20 cycloalkylene group, a substituted or unsubstituted C1 to C20 alkenylene group, a substituted or unsubstituted C3 to C20 cycloalkenylene group, a substituted or unsubstituted C1 to C20 heteroalkylene group, a substituted or unsubstituted C3 to C20 heterocycloalkylene group, a substituted or unsubstituted C1 to C20 heteroalkenylene group, and a substituted or unsubstituted C3 to C20 heterocycloalkenylene group,
Ar 1 has one of the following structures:

Ar 2 is a substituted or unsubstituted C8 to C30 condensed polycyclic aryl group, wherein the C8 to C30 condensed polycyclic aryl group does not include any heteroatom, and wherein Ar 2 is different than Ar 1 ,
each of R 1 , R 2 , R 3 and R 4 is independently selected from the group consisting of hydrogen, deuterium, a substituted or unsubstituted C1 to C20 alkyl group, a unsubstituted C3 to C30 cycloalkyl group, a substituted or unsubstituted C1 to C20 alkenyl group, a substituted or unsubstituted C1 to C20 alkynyl group, a substituted or unsubstituted C1 to C20 heteroalkyl group, a substituted or unsubstituted C3 to C20 aralkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, and a substituted or unsubstituted C3 to C20 heteroaralkyl group, and
each of k, l, m, and n is independently an integer of 0 to 4.

2. The organic electroluminescent device of claim 1 , wherein each of L 1 and L 2 includes substituted or unsubstituted phenylene.

3. The organic electroluminescent device of claim 1 , wherein Ar 2 is an unsubstituted naphthyl group when Ar 1 is not an unsubstituted naphthyl group.

4. The organic electroluminescent device of claim 1 , wherein the organic layer disposed between the anode and the light emitting layer includes a hole transport auxiliary layer.

5. The organic electroluminescent device of claim 4 , wherein the at least one organic layer between the anode and the cathode further includes at least one layer selected from the group consisting of a hole injection layer, a hole transport layer, an electron transport auxiliary layer, an electron transport layer and an electron injection layer.

6. The organic electroluminescent device of claim 1 , wherein the compound of Chemical Formula 1 has one of the following structures:

7. An organic electroluminescent device, comprising:
a first electrode;
a second electrode opposing the first electrode; and
at least one organic layer between the first electrode and the second electrode, the at least one organic layer including:
a light emitting layer;
a first organic layer including a compound represented by the following Chemical Formula 2; and
a second organic layer including a compound represented by the following Chemical Formula 3,

wherein the first and second organic layers are disposed between the first electrode and the light emitting layer,

wherein:
each of L 3 and L 4 is independently selected from the group consisting of a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 6 to 30 carbon atoms, a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 10 carbon atoms, a substituted or unsubstituted alkenylene group having 2 to 10 carbon atoms, a substituted or unsubstituted cycloalkenylene group having 3 to 10 carbon atoms, a substituted or unsubstituted heteroalkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted heterocycloalkylene group having 2 to 10 carbon atoms, a substituted or unsubstituted heteroalkenylene group having 2 to 10 carbon atoms, and a substituted or unsubstituted heterocycloalkenylene group having 2 to 10 carbon atoms,
L 5 is independently selected from the group consisting of a single

Assignees

• Lg Display Co Ltd
• Mat Science Co Ltd

Inventors

• Song Inbum
• Yoon Seunghee
• Park Heejun
• Yoo Seonkeun
• Jang Soyoung
• Kim Sunghoon
• Park Seong-Min
• Lee Tae Wan
• Kim Sunjae
• Lee Dong Hun
• Heo Jeonghoe

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/8052

  Cathodes · CPC title

• H10K59/8051

  Anodes · CPC title

• H10K85/624 Primary

  containing six or more rings · CPC title

• H10K85/615 Primary

  Polycyclic condensed aromatic hydrocarbons, e.g. anthracene · CPC title