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:
Nov. 14, 2019
Applicants:
Kwansei Gakuin Educational Foundation, Nishinomiya, JP;
SK Materials Jnc Co., Ltd., Hwaseong-si, KR;
Inventors:
Assignees:
KWANSEI GAKUIN EDUCATIONAL FOUNDATION, Nishinomiya, JP;
SK MATERIALS JNC CO., LTD., Hwaseong-si, KR;
Primary Examiner:
Int. Cl.
CPC ...
H01L 51/50 (2006.01); H10K 85/00 (2023.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 50/11 (2023.01); H10K 101/10 (2023.01);
U.S. Cl.
CPC ...
H10K 85/6574 (2023.02); H10K 85/00 (2023.02); H10K 85/322 (2023.02); H10K 85/6572 (2023.02); H10K 50/11 (2023.02); H10K 2101/10 (2023.02);
Abstract
An organic electroluminescent device having a light-emitting layer, wherein the light-emitting layer contains a host compound having a boron atom and an oxygen atom in the molecule as a first component, a thermally assisting delayed fluorescent material such that the energy difference ΔEST between the excited singlet energy level and the excited triplet energy level is 0.20 eV or less as a second component, and a fluorescent material as a third component, and has a high light emission efficiency.