Patent · US Active

Organic electroluminescence element

US12089494B2 · kind B2 · utility

0Cited by

0References

21Claims

0Family size

Assignees

KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION · JP
KYULUX, INC. · JP

Inventors

Hajime Nakanotani · Fukuoka, JP
Chihaya Adachi · Fukuoka, JP
Hiroki Noda · Fukuoka, JP
Yoshitake Suzuki · Osaka, JP
Naoto Notsuka · Fukuoka, JP
Hiroko Nomura · Fukuoka, JP
Ayataka Endo · Fukuoka, JP
Ping Kuen Daniel TSANG · Fukuoka, JP

Key dates

Filing date	Jun 13, 2019
Grant date	Sep 10, 2024
Priority date	—
Expiry date	Jan 11, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH10K2101/90
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

An organic electroluminescent device having an anode, a cathode, and a light-emitting layer between the anode and the cathode, wherein the light-emitting layer contains at least a first organic compound, a second organic compound and a third organic compound satisfying the following formula (A), the second organic compound is a delayed fluorescent material, and the third organic compound is a light-emitting material, has a high light emission efficiency. Formula (A): ES1(A)>ES1(B)>ES1(C) wherein ES1(A), ES1(B) and ES1(C) each represent a lowest excited singlet energy level of the first organic compound, the second organic compound and the third organic compound, respectively.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.