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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 12666789 B1

PDFFull Text
Date of Patent:
Jun. 23, 2026

Filed:

Nov. 28, 2023

Light-emitting device

Applicant:

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

Inventors:

Takeyoshi Watabe, Atsugi, JP;

Nobuharu Ohsawa, Zama, JP;

Hiromi Seo, Sagamihara, JP;

Satoshi Seo, Sagamihara, JP;

Assignee:

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

Attorney:

Husch Blackwell LLP

Primary Examiner:

Khaja Ahmad

Int. Cl.
CPC ...
H10K 50/19 (2023.01); H10K 50/11 (2023.01); H10K 85/20 (2023.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 101/30 (2023.01); H10K 102/00 (2023.01);
U.S. Cl.
CPC ...
H10K 50/19 (2023.02); H10K 50/11 (2023.02); H10K 85/211 (2023.02); H10K 85/311 (2023.02); H10K 85/342 (2023.02); H10K 85/615 (2023.02); H10K 85/624 (2023.02); H10K 85/633 (2023.02); H10K 85/636 (2023.02); H10K 85/657 (2023.02); H10K 85/6572 (2023.02); H10K 85/6576 (2023.02); H10K 2101/30 (2023.02); H10K 2102/351 (2023.02);
Abstract

The light-emitting device includes a first electrode, a second electrode, and an organic compound layer between the first electrode and the second electrode. The organic compound layer includes a first light-emitting unit, an intermediate layer, and a second light-emitting unit in this order from the first electrode side. The first light-emitting unit includes a first light-emitting layer, and the second light-emitting unit includes a second light-emitting layer. The intermediate layer includes a first layer, a second layer, and a third layer in this order from the first electrode side, with the second layer being in contact with the first layer and the third layer. The spin density of the first layer is lower than or equal to 1×10spins/cm. The LUMO level of a material included in the second layer is greater than or equal to −4.30 eV and less than or equal to −3.00 eV.

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