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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 12588408 B1

PDFFull Text
Date of Patent:
Mar. 24, 2026

Filed:

Jan. 30, 2023

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

Applicant:

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

Inventors:

Satoshi Seo, Kanagawa, JP;

Tsunenori Suzuki, Kanagawa, JP;

Yusuke Takita, Kanagawa, JP;

Naoaki Hashimoto, Kanagawa, JP;

Assignee:

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

Attorney:

Husch Blackwell LLP

Primary Examiner:

Ali Naraghi

Int. Cl.
CPC ...
H10K 85/60 (2023.01); C07D 209/82 (2006.01); H10K 50/11 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); H10K 71/16 (2023.01); H10K 101/10 (2023.01); H10K 101/30 (2023.01);
U.S. Cl.
CPC ...
H10K 85/615 (2023.02); C07D 209/82 (2013.01); H10K 50/11 (2023.02); H10K 50/17 (2023.02); H10K 71/16 (2023.02); H10K 85/626 (2023.02); H10K 85/631 (2023.02); H10K 85/633 (2023.02); H10K 85/6572 (2023.02); H10K 85/6576 (2023.02); H10K 50/15 (2023.02); H10K 50/156 (2023.02); H10K 50/16 (2023.02); H10K 50/166 (2023.02); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02);
Abstract

A novel light-emitting element is provided. A light-emitting element with a long lifetime is provided. A light-emitting element with high emission efficiency is provided. In the light-emitting element, an EL layer includes a hole-injection layer, a first hole-transport layer, a second hole-transport layer, a third hole-transport layer, a light-emitting layer, a first electron-transport layer, and a second electron-transport layer in this order; the hole-injection layer includes an organic acceptor; the LUMO level of the host material is higher than that of the first electron-transport layer; the LUMO level of the second electron-transport layer is higher than that of the first electron-transport layer; the host material is a substance including a condensed aromatic ring skeleton; and the first and second electron-transport layers each include a substance having a heteroaromatic ring skeleton.

Find Patent Forward Citations

Seo, Satoshi. (2026). Light-emitting element, light-emitting device, electronic device, and lighting device (U.S. Patent No. 12588408). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12588408

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

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