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. 27, 2024
Filed:
Jan. 22, 2021
Idemitsu Kosan Co.,ltd., Tokyo, JP;
IDEMITSU KOSAN CO., LTD., Tokyo, JP;
Abstract
An organic electroluminescence device includes an anode, an emitting layer, and a cathode in this order. The emitting layer comprises a delayed fluorescent compound M2 and a compound M3 having at least one deuterium atom, and the compound M3 is not a compound having a partial structure represented by a formula (1C) or (2C). S(M2) of the compound M2 and S(M3) of the compound M3 satisfy a relationship of S(M3)>S(M2). In the formulae (1C) and (2C), Yto Yare each independently a N atom, CR, or a C atom bonded to another atom or the like in the compound M3, where each R is independently a H atom or a substituent, at least one of Yto Yis a N atom, and at least one of Yto Yis a C atom bonded to another atom or the like in the compound M3.