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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 11758746 B1

PDFFull Text
Date of Patent:
Sep. 12, 2023

Filed:

Aug. 22, 2022

Electroluminescent device, and display device comprising thereof

Applicant:

Samsung Electronics Co., Ltd., Suwon-si, KR;

Inventors:

Sujin Park, Seoul, KR;

Yuho Won, Seoul, KR;

Eun Joo Jang, Suwon-si, KR;

Dae Young Chung, Suwon-si, KR;

Sung Woo Kim, Hwaseong-si, KR;

Jin A Kim, Suwon-si, KR;

Yong Seok Han, Anyang-si, KR;

Assignee:

SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do, KR;

Attorney:

CANTOR COLBURN LLP

Primary Examiner:

Anthony Ho

Int. Cl.
CPC ...
H01L 51/50 (2006.01); H10K 50/115 (2023.01); H10K 50/15 (2023.01); H10K 85/10 (2023.01); H10K 50/16 (2023.01); H10K 71/15 (2023.01); H10K 102/00 (2023.01);
U.S. Cl.
CPC ...
H10K 50/115 (2023.02); H10K 50/15 (2023.02); H10K 85/115 (2023.02); H10K 85/1135 (2023.02); H10K 50/16 (2023.02); H10K 71/15 (2023.02); H10K 2102/331 (2023.02); H10K 2102/351 (2023.02);
Abstract

An electroluminescent device includes a first electrode and a second electrode facing each other; a hole transport layer between the first electrode and the second electrode; a light emitting layer including a first light emitting layer disposed between the hole transport layer and the second electrode and including a first quantum dot and a second light emitting layer between the first light emitting layer and the second electrode and including a second quantum dot; and an electron transport layer between the light emitting layer and the second electrode. Each of the first and second light emitting layers emits first light, hole transport capability per unit area and electron transport capability per unit area of the first quantum dot are greater than hole transport capability per unit area and electron transport capability per unit area of the second quantum dot, respectively.

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