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:
Oct. 06, 2026
Filed:
Mar. 09, 2022
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Yoshinori Aoyama, Tokyo, JP;
Kazuki Nishimura, Tokyo, JP;
IDEMITSU KOSAN CO., LTD., Tokyo, JP;
Abstract
An organic EL device is provided in which a first emitting layer contains a first compound as a first host material and a first emitting compound, a second emitting layer contains a second compound as a second host material and a second emitting compound, a triplet energy of the first host material T(H1) and a triplet energy of the second host material T(H2) satisfy a relationship of (Numerical Formula 1A) below, a first electron transporting layer contains a third compound, and a difference between an affinity value of the third compound Af(M3) and an affinity value of the host material contained in the emitting layer that is closer to the cathode and is the first emitting layer or the second emitting layer Af(HX) satisfies a relationship of (Numerical Formula 2A) below,