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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 12652950 B1

PDFFull Text
Date of Patent:
Jun. 09, 2026

Filed:

Jul. 28, 2022

Iridium complex, light-emitting element, display device, electronic device, and lighting device

Applicant:

Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;

Inventors:

Satoshi Seo, Sagamihara, JP;

Takeyoshi Watabe, Isehara, JP;

Hideko Inoue, Atsugi, JP;

Yui Yamada, Atsugi, JP;

Satomi Mitsumori, Atsugi, JP;

Tatsuyoshi Takahashi, Atsugi, JP;

Tomoka Hara, Zarna, JP;

Assignee:

Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;

Attorney:

Fish & Richardson P.C.

Primary Examiner:

Robert S Loewe

Int. Cl.
CPC ...
H10K 50/11 (2023.01); C07F 15/00 (2006.01); C09K 11/02 (2006.01); C09K 11/06 (2006.01); 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 85/342 (2023.02); C07F 15/0033 (2013.01); C09K 11/025 (2013.01); C09K 11/06 (2013.01); H10K 50/11 (2023.02); C09K 2211/1007 (2013.01); C09K 2211/1059 (2013.01); C09K 2211/185 (2013.01); H10K 85/654 (2023.02); H10K 85/6572 (2023.02); H10K 85/6576 (2023.02); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02); H10K 2101/80 (2023.02); H10K 2101/90 (2023.02);
Abstract

Provided is a light-emitting element with high emission efficiency. The light-emitting element includes a first organic compound, a second organic compound, and a guest material. The LUMO level of the first organic compound is lower than that of the second organic compound, and the HOMO level of the first organic compound is lower than that of the second organic compound. The LUMO level of a guest material is higher than that of the first organic compound, and the HOMO level of the guest material is lower than that of the second organic compound. The guest material has a function of converting triplet excitation energy into light emission. The first organic compound and the second organic compound form an exciplex.

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