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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 12100795 B1

PDFFull Text
Date of Patent:
Sep. 24, 2024

Filed:

Feb. 21, 2020

Light-emitting element

Applicant:

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

Inventors:

Satoko Shitagaki, Kanagawa, JP;

Satoshi Seo, Kanagawa, JP;

Nobuharu Ohsawa, Kanagawa, JP;

Hideko Inoue, Kanagawa, JP;

Kunihiko Suzuki, Kanagawa, JP;

Assignee:

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

Attorney:

Fish & Richardson P.C.

Primary Examiner:

Moin M Rahman

Int. Cl.
CPC ...
H01L 51/00 (2006.01); C07D 209/86 (2006.01); C07D 239/26 (2006.01); C07D 241/12 (2006.01); C07D 333/76 (2006.01); C07D 409/10 (2006.01); C07D 471/04 (2006.01); C07F 15/00 (2006.01); C09K 11/02 (2006.01); C09K 11/06 (2006.01); H10K 50/11 (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 85/342 (2023.02); C07D 209/86 (2013.01); C07D 239/26 (2013.01); C07D 241/12 (2013.01); C07D 333/76 (2013.01); C07D 409/10 (2013.01); C07D 471/04 (2013.01); C07F 15/0033 (2013.01); C09K 11/025 (2013.01); C09K 11/06 (2013.01); H10K 50/11 (2023.02); H10K 85/631 (2023.02); H10K 85/633 (2023.02); H10K 85/636 (2023.02); H10K 85/6572 (2023.02); H10K 85/6576 (2023.02); C09K 2211/1007 (2013.01); C09K 2211/1074 (2013.01); C09K 2211/185 (2013.01); H10K 85/615 (2023.02); H10K 85/624 (2023.02); H10K 85/626 (2023.02); H10K 2101/10 (2023.02); H10K 2101/27 (2023.02); H10K 2101/30 (2023.02); H10K 2101/90 (2023.02);
Abstract

A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element is provided which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes, in which a combination of the first organic compound and the second organic compound forms an exciplex (excited complex). The light-emitting element transfers energy by utilizing an overlap between the emission spectrum of the exciplex and the absorption spectrum of the phosphorescent compound and thus has high energy transfer efficiency. Therefore, a light-emitting element having high external quantum efficiency can be obtained.

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