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 12402527 B1

Date of Patent:

Aug. 26, 2025

Filed:

Dec. 18, 2020

Light-emitting device, method of manufacturing the same, and electronic apparatus including the light-emitting device

Applicant:

Samsung Display Co., Ltd., Yongin-si, KR;

Inventor:

Hyejeong Park, Yongin-si, KR;

Assignee:

Samsung Display Co., Ltd., Yongin-si, KR;

Attorney:

Lerner David LLP

Primary Examiner:

Dawn L Garrett

Int. Cl.

CPC ...

H10K 85/60 (2023.01); H10K 50/15 (2023.01); H10K 50/17 (2023.01); H10K 101/20 (2023.01);

U.S. Cl.

CPC ...

H10K 85/636 (2023.02); H10K 50/15 (2023.02); H10K 50/156 (2023.02); H10K 85/633 (2023.02); H10K 85/6572 (2023.02); H10K 50/17 (2023.02); H10K 2101/20 (2023.02);

Abstract

A light-emitting device includes a first electrode; a second electrode facing the first electrode; and an interlayer disposed between the first electrode and the second electrode. The interlayer includes an emission layer and a hole transport region disposed between the first electrode and the emission layer. The hole transport region includes a hole injection layer and a hole transport layer disposed between the hole injection layer and the emission layer. The hole injection layer includes a first compound, the hole transport layer includes a second compound, and a glass transition temperature of the first compound is lower than a glass transition temperature of the second compound.

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