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:
Aug. 08, 2023
Filed:
Sep. 10, 2020
Applicant:
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Inventors:
Ryoji Maeda, Sodegaura, JP;
Satomi Tasaki, Sodegaura, JP;
Kazuki Nishimura, Sodegaura, JP;
Yongguk Lee, Sodegaura, JP;
Assignee:
IDEMITSU KOSAN CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/06 (2006.01); H10K 85/60 (2023.01); C09K 11/02 (2006.01); H10K 50/11 (2023.01); H10K 101/00 (2023.01);
U.S. Cl.
CPC ...
H10K 85/626 (2023.02); C09K 11/025 (2013.01); C09K 11/06 (2013.01); H10K 85/6574 (2023.02); H10K 50/11 (2023.02); H10K 2101/90 (2023.02);
Abstract
An organic electroluminescence device includes: an anode; a cathode; a first emitting layer, and a second emitting layer, in which the first emitting layer includes a first host material in a form of a first compound represented by a formula (1), the second emitting layer includes a second host material in a form of a second compound represented by a formula (2) and having at least one group represented by a formula (21), and the first emitting layer is in direct contact with the second emitting layer.