The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2024
Filed:
Jun. 13, 2019
Kyushu University, National University Corporation, Fukuoka, JP;
Kyulux, Inc., Fukuoka, JP;
Hajime Nakanotani, Fukuoka, JP;
Chihaya Adachi, Fukuoka, JP;
Hiroki Noda, Fukuoka, JP;
Yoshitake Suzuki, Fukuoka, JP;
Naoto Notsuka, Fukuoka, JP;
Hiroko Nomura, Fukuoka, JP;
Ayataka Endo, Fukuoka, JP;
Ping Kuen Daniel Tsang, Fukuoka, JP;
KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Fukuoka, JP;
KYULUX, INC., Fukuoka, JP;
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): E(A)>E(B)>E(C) wherein E(A), E(B) and E(C) each represent a lowest excited singlet energy level of the first organic compound, the second organic compound and the third organic compound, respectively.