Compound and organic electroluminescent device comprising the same

Patent metadata

Field	Value
Publication number	US-11545630-B2
Application number	US-201916675197-A
Country	US
Kind code	B2
Filing date	Nov 5, 2019
Priority date	Nov 5, 2018
Publication date	Jan 3, 2023
Grant date	Jan 3, 2023

Abstract

Organic electroluminescent devices with lowered driving voltages, and enhanced efficiencies and lifetimes are provided.

First claim

The invention claimed is:

1. An organic electroluminescent device, comprising:
a first electrode;
a second electrode; and
at least one organic layer between the first electrode and the second electrode, the at least one organic layer including a light emission layer, and a hole transport layer and a hole transport auxiliary layer between the first electrode and the light emission layer,
wherein the hole transport auxiliary layer includes a compound represented by the following Chemical Formula 1:

Ar 1 is represented by the following Chemical Formula 2:

Ar 2 is represented by the following Chemical Formula 3:

wherein:
each of Ar 3 to Ar 7 is independently a substituted or unsubstituted C3 to C30 aryl group, and at least one of Ar 3 to Ar 7 represents a substituted or unsubstituted C8 to C30 aryl group,
each of R 1 to R 5 is independently selected from the group consisting of hydrogen, deuterium, substituted or unsubstituted C1 to C30 alkyl, substituted or unsubstituted C3 to C30 cycloalkyl, substituted or unsubstituted C6 to C30 aryl, and substituted or unsubstituted C2 to C30 heteroaryl, and
each of k, l and m is independently an integer of 0 to 4,

wherein the at least one organic layer further includes at least one layer selected from the group consisting of a hole injection layer, an electron transport auxiliary layer, an electrode transport layer and an electron injection layer, and
wherein the organic electroluminescent device further comprises a driving thin film transistor including an active layer electrically connected to the first electrode.

2. The organic electroluminescent device of claim 1 , further comprising a first passivation film on the second electrode, and a second passivation film on the first passivation film.

3. The organic electroluminescent device of claim 2 , wherein the first passivation film is over an entirety of the at least one organic layer and the second electrode.

4. The organic electroluminescent device of claim 2 , further comprising an encapsulation film on the second passivation film, wherein the encapsulation film is bonded to the second passivation film via an adhesive film.

5. The organic electroluminescent device of claim 1 , wherein the active layer includes an oxide semiconductor material.

6. The organic electroluminescent device of claim 1 , wherein the driving thin film transistor includes:
a gate insulating film on the active layer; and
a gate electrode on the gate insulating film.

7. The organic electroluminescent device of claim 1 , wherein each of Ar 3 to Ar 7 is independently a substituted or unsubstituted C8 to C30 condensed polycyclic group.

8. The organic electroluminescent device of claim 1 , wherein each of Ar 3 to Ar 7 is independently substituted or unsubstituted naphthylene, substituted or unsubstituted phenanthrene, substituted or unsubstituted anthracene, or substituted or unsubstituted pyrene.

9. The organic electroluminescent device of claim 1 , wherein the compound represented by Chemical Formula 1 is represented by one of the following compounds:

Assignees

• Lg Display Co Ltd
• Mat Science Co Ltd

Inventors

• Song Inbum
• Yoon Seunghee
• Kim Sunghoon
• Lee Tae Wan
• Lee Dong Hun
• Heo Jeonghoe
• Park Seong-Min
• Kim Sunjae

Classifications

• C07D209/86 Primary

  with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system · CPC title

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• C09K2211/10

  Non-macromolecular compounds · CPC title

• H01L29/7869

  Electricity · mapped topic

• H01L51/5092

  Electricity · mapped topic