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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.:

US 12575319 B1

PDFFull Text
Date of Patent:
Mar. 10, 2026

Filed:

Jun. 11, 2021

Organic electroluminescence device and electronic device

Applicant:

Idemitsu Kosan Co., Ltd., Tokyo, JP;

Inventors:

Takushi Shiomi, Sodegaura, JP;

Hisato Matsumoto, Sodegaura, JP;

Hiromi Nakano, Sodegaura, JP;

Toshinari Ogiwara, Sodegaura, JP;

Assignee:

IDEMITSU KOSAN CO., LTD., Tokyo, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Seokmin Jeon

Int. Cl.
CPC ...
H10K 85/60 (2023.01); C07D 498/04 (2006.01); C09K 11/06 (2006.01); H10K 50/11 (2023.01); H10K 50/12 (2023.01); H10K 101/00 (2023.01); H10K 101/20 (2023.01);
U.S. Cl.
CPC ...
H10K 85/657 (2023.02); C07D 498/04 (2013.01); C09K 11/06 (2013.01); H10K 85/654 (2023.02); H10K 85/6572 (2023.02); C09K 2211/1018 (2013.01); H10K 50/11 (2023.02); H10K 50/12 (2023.02); H10K 2101/20 (2023.02); H10K 2101/90 (2023.02);
Abstract

An organic EL device includes: an anode, a cathode, and an emitting layer, in which the emitting layer contains a first compound of a formula (1), a second compound of a formula (2), and a third compound that exhibits delayed fluorescence, and singlet energies Sof the first compound, the second compound, and the third compound satisfy Numerical Formula 1 and Numerical Formula 2. In the formula (1), A represents a group of a formula (a1) or the like, L represents a linking group or the like, and B represents an aryl group or the like. The first compound of the formula (1) has no carbonyl group. In the formula (2), Yto Yeach independently represent an N atom, CR, or the like. Rrepresents a substituent, a group of a formula (2A), or the like.

Find Patent Forward Citations

Shiomi, Takushi. (2026). Organic electroluminescence device and electronic device (U.S. Patent No. 12575319). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12575319

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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