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:
Dec. 31, 2024
Filed:
Feb. 03, 2021
Applicant:
Kyulux, Inc., Fukuoka, JP;
Inventors:
Hayato Kakizoe, Fukuoka, JP;
Hiroaki Ozawa, Fukuoka, JP;
Ayataka Endo, Fukuoka, JP;
YuSeok Yang, Fukuoka, JP;
Assignee:
KYULUX, INC., Fukuoka, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/02 (2006.01); C07D 405/10 (2006.01); C07D 409/14 (2006.01); C07D 491/048 (2006.01); C07D 491/153 (2006.01); C09K 11/06 (2006.01); H10K 50/11 (2023.01); H10K 85/60 (2023.01);
U.S. Cl.
CPC ...
C09K 11/02 (2013.01); C07D 405/10 (2013.01); C07D 409/14 (2013.01); C07D 491/048 (2013.01); C07D 491/153 (2013.01); C09K 11/06 (2013.01); H10K 85/654 (2023.02); H10K 85/657 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); C09K 2211/1007 (2013.01); C09K 2211/1018 (2013.01); H10K 50/11 (2023.02);
Abstract
An organic light emitting element produced by using a light emitting composition that contains both a first compound having a PBHT value more than 0.730 and a second compound having Elower than that of the first compound and ΔEless than 0.20 eV is excellent in durability. Eis the lowest excited singlet energy level, ΔEis the difference between the lowest excited singlet energy level and the lowest excited triplet energy level.