logo

For the Inventor, By the Inventor

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 12559673 B1

PDFFull Text
Date of Patent:
Feb. 24, 2026

Filed:

Sep. 16, 2020

Organic electroluminescent element

Applicant:

Nippon Steel Chemical & Material Co., Ltd., Tokyo, JP;

Inventors:

Junya Ogawa, Tokyo, JP;

Takahiro Kai, Tokyo, JP;

Masashi Tada, Tokyo, JP;

Kazunari Yoshida, Tokyo, JP;

Assignee:

NIPPON STEEL CHEMICAL & MATERIAL CO., LTD., Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Dylan C Kershner

Int. Cl.
CPC ...
C09K 11/06 (2006.01); C07D 401/14 (2006.01); C07D 405/14 (2006.01); C07D 409/14 (2006.01); C07D 487/04 (2006.01); C07F 15/00 (2006.01); H10K 50/11 (2023.01); H10K 50/18 (2023.01); H10K 71/16 (2023.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 101/00 (2023.01);
U.S. Cl.
CPC ...
C09K 11/06 (2013.01); C07D 401/14 (2013.01); C07D 405/14 (2013.01); C07D 409/14 (2013.01); C07D 487/04 (2013.01); H10K 50/11 (2023.02); H10K 85/615 (2023.02); H10K 85/622 (2023.02); H10K 85/631 (2023.02); H10K 85/652 (2023.02); H10K 85/654 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); C07F 15/0033 (2013.01); H10K 50/18 (2023.02); H10K 71/164 (2023.02); H10K 85/342 (2023.02); H10K 2101/90 (2023.02);
Abstract

To provide an organic electroluminescent device having high efficiency and high driving stability while having a low driving voltage. The organic electroluminescent device has one or more light-emitting layers between an anode and a cathode opposed to each other, wherein at least one of the light-emitting layers is a light-emitting layer composed of a vapor deposition layer containing a first host, a second host and a light-emitting dopant material; the first host is selected from oligopyridine compounds represented by the general formula (1); and the second host is selected from carbazole compounds having two or more carbazole rings, indolocarbazole compounds having an indolocarbazole ring or compounds having a carbazole ring and an indolocarbazole ring.

Find Patent Forward Citations

Ogawa, Junya. (2026). Organic electroluminescent element (U.S. Patent No. 12559673). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12559673

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…