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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 12048175 B1

PDFFull Text
Date of Patent:
Jul. 23, 2024

Filed:

Dec. 28, 2016

Organic electroluminescent device

Applicant:

Kyushu University, National University Corporation, Fukuoka, JP;

Inventors:

Ping Kuen Daniel Tsang, Fukuoka, JP;

Chihaya Adachi, Fukuoka, JP;

Assignee:

KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Fukuoka, JP;

Attorney:

BROWDY AND NEIMARK, PLLC

Primary Examiner:

Jay Yang

Int. Cl.
CPC ...
H01L 51/50 (2006.01); C09K 11/06 (2006.01); H01L 51/00 (2006.01); H01L 51/52 (2006.01); H10K 50/12 (2023.01); H10K 50/18 (2023.01); H10K 50/81 (2023.01); H10K 50/82 (2023.01); H10K 50/11 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 85/60 (2023.01); H10K 101/00 (2023.01); H10K 101/10 (2023.01);
U.S. Cl.
CPC ...
H10K 50/12 (2023.02); C09K 11/06 (2013.01); H10K 50/18 (2023.02); H10K 50/81 (2023.02); H10K 50/82 (2023.02); H10K 50/11 (2023.02); H10K 50/15 (2023.02); H10K 50/166 (2023.02); H10K 85/654 (2023.02); H10K 85/6572 (2023.02); H10K 2101/10 (2023.02); H10K 2101/90 (2023.02);
Abstract

An organic electroluminescent device having a structure of at least an anode, a light-emitting layerand a cathodelayered in that order, wherein the light-emitting layercontains a first host material, a second host material and a light-emitting material of a dopant, and both the first host material and the second host material have a lowest excited triplet energy level higher than the lowest excited triplet energy level of the light-emitting material. The device is protected from performance deterioration with time in driving and has a long lifetime.

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