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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 11925041 B1

PDFFull Text
Date of Patent:
Mar. 05, 2024

Filed:

Dec. 18, 2020

Light-emitting element, display device, electronic device, and lighting device

Applicant:

Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;

Inventors:

Satoshi Seo, Kanagawa, JP;

Takeyoshi Watabe, Kanagawa, JP;

Satomi Mitsumori, Kanagawa, JP;

Assignee:

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

Attorney:

Husch Blackwell LLP

Primary Examiner:

Andrew K Bohaty

Int. Cl.
CPC ...
H01L 51/54 (2006.01); C07D 241/38 (2006.01); C07D 403/12 (2006.01); C07D 405/10 (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 50/13 (2023.01); H10K 59/35 (2023.01); H10K 101/00 (2023.01); H10K 101/10 (2023.01); H10K 101/30 (2023.01); H10K 101/40 (2023.01);
U.S. Cl.
CPC ...
H10K 50/11 (2023.02); C07D 241/38 (2013.01); C07D 403/12 (2013.01); C07D 405/10 (2013.01); C09K 11/02 (2013.01); C09K 11/06 (2013.01); H10K 85/342 (2023.02); H10K 85/633 (2023.02); H10K 85/636 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); C09K 2211/1007 (2013.01); C09K 2211/1011 (2013.01); C09K 2211/1014 (2013.01); C09K 2211/1022 (2013.01); C09K 2211/1029 (2013.01); C09K 2211/1033 (2013.01); C09K 2211/1044 (2013.01); C09K 2211/1048 (2013.01); C09K 2211/1051 (2013.01); C09K 2211/1059 (2013.01); C09K 2211/1088 (2013.01); C09K 2211/1092 (2013.01); C09K 2211/185 (2013.01); C09K 2211/188 (2013.01); H10K 50/131 (2023.02); H10K 59/35 (2023.02); H10K 85/615 (2023.02); H10K 2101/10 (2023.02); H10K 2101/27 (2023.02); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02); H10K 2101/90 (2023.02); Y02P 20/582 (2015.11);
Abstract

To provide a light-emitting element with high emission efficiency and low driving voltage. The light-emitting element includes a guest material and a host material. A LUMO level of the guest material is lower than a LUMO level of the host material. An energy difference between the LUMO level and a HOMO level of the guest material is larger than an energy difference between the LUMO level and a HOMO level of the host material. The guest material has a function of converting triplet excitation energy into light emission. An energy difference between the LUMO level of the guest material and the HOMO level of the host material is larger than or equal to energy of light emission of the guest material.

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