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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 12610684 B1

PDFFull Text
Date of Patent:
Apr. 21, 2026

Filed:

Mar. 09, 2022

Organic electroluminescence element, electronic apparatus, and production method for organic electroluminescence element

Applicant:

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

Inventors:

Kengo Kishino, Tokyo, JP;

Satomi Tasaki, Tokyo, JP;

Kazuki Nishimura, Tokyo, JP;

Yoshiaki Takahashi, Tokyo, JP;

Assignee:

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

Attorney:

Foley & Lardner LLP

Primary Examiner:

Robert J Michaud

Int. Cl.
CPC ...
H10K 50/11 (2023.01); C09K 11/06 (2006.01); H10K 50/00 (2023.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 101/00 (2023.01); H10K 101/10 (2023.01); H10K 101/30 (2023.01);
U.S. Cl.
CPC ...
H10K 50/11 (2023.02); C09K 11/06 (2013.01); H10K 50/00 (2023.02); H10K 85/342 (2023.02); H10K 85/626 (2023.02); H10K 85/633 (2023.02); H10K 85/6574 (2023.02); H10K 85/658 (2023.02); C09K 2211/185 (2013.01); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02); H10K 2101/90 (2023.02);
Abstract

An organic EL device includes an anode, a cathode, and an emitting layer disposed between the anode and the cathode, in which the emitting layer includes a first emitting layer and a second emitting layer, the first emitting layer contains a first host material and a first luminescent compound, the second emitting layer contains a second host material and a second luminescent compound, the first host material and the second host material are mutually different, the first luminescent compound and the second luminescent compound are mutually the same or different, 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 1, and a diffusion coefficient Dof the triplet energy of the first host material T(H1) calculated according to a diffusion equation is 3.0×10(cm/s) or more,

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