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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 12707886 B1

PDFFull Text
Date of Patent:
Aug. 11, 2026

Filed:

Nov. 20, 2019

Perovskite light emitting device

Applicants:

Lg Display Co., Ltd., Seoul, KR;

Korea University Research and Business Foundation, Seoul, KR;

Unist(ulsan National Institute of Science and Technology), Ulju-gun Ulsan, KR;

Inventors:

Han Young Woo, Paju-si, KR;

Kiseok Chang, Paju-si, KR;

Myoung Hoon Song, Paju-si, KR;

Jeong Min Moon, Paju-si, KR;

Su Seok Choi, Paju-si, KR;

Thanh Luan Nguyen, Paju-si, KR;

Seungjin Lee, Paju-si, KR;

Chung Hyeon Jang, Paju-si, KR;

Assignees:

LG Display Co., Ltd., Seoul, KR;

Korea University Research Business Foundation, Seoul, KR;

UNIST (ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY, Ulsan, KR;

Attorney:

Fish & Richardson P.C.

Primary Examiner:

Jennifer A Boyd

Assistant Examiner:

Braelyn R Watson

Int. Cl.
CPC ...
H10K 85/60 (2023.01); H10K 50/11 (2023.01); H10K 50/15 (2023.01); H10K 71/00 (2023.01); H10K 71/12 (2023.01); H10K 85/50 (2023.01); H10K 101/30 (2023.01); H10K 101/40 (2023.01); H10K 50/84 (2023.01); H10K 71/40 (2023.01); H10K 102/00 (2023.01);
U.S. Cl.
CPC ...
H10K 85/615 (2023.02); H10K 71/12 (2023.02); H10K 71/811 (2023.02); H10K 85/50 (2023.02); H10K 50/11 (2023.02); H10K 50/15 (2023.02); H10K 50/84 (2023.02); H10K 71/40 (2023.02); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02); H10K 2102/00 (2023.02); H10K 2102/351 (2023.02);
Abstract

A perovskite light emitting diode having degradation of the characteristics of the light emitting device, caused by PEDOT:PSS can be improved by replacing PEDOT:PSS contained in a conventional hole transport layer with an anionic conjugated polymer having ammonium-based counter ions, and the light emission characteristics can be greatly improved by passivating defects of a perovskite light emitting layer with a hole transport layer containing a conjugated polymer and increasing crystal growth.

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