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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 12193324 B1

PDFFull Text
Date of Patent:
Jan. 07, 2025

Filed:

Mar. 13, 2020

Melt mixture for organic electroluminescent element, and organic electroluminescent element

Applicant:

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

Inventors:

Masashi Tada, Tokyo, JP;

Yuta Sagara, Tokyo, JP;

Assignee:

NIPPON STEEL Chemical & Material Co., Ltd., Tokyo, JP;

Attorney:

JCIPRNET

Primary Examiner:

Gregory D Clark

Int. Cl.
CPC ...
H01L 51/50 (2006.01); H10K 71/16 (2023.01); H10K 85/60 (2023.01); H10K 50/11 (2023.01); H10K 50/12 (2023.01); H10K 101/10 (2023.01);
U.S. Cl.
CPC ...
H10K 85/654 (2023.02); H10K 71/164 (2023.02); H10K 85/626 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); H10K 50/11 (2023.02); H10K 50/12 (2023.02); H10K 2101/10 (2023.02);
Abstract

Provided are an organic EL device having high luminous efficiency and a prolonged lifespan with a low driving voltage, and a melt mixture for an organic electroluminescent device used in the organic EL device. The melt mixture for an organic electroluminescent device is a melt mixture of at least two types of organic compounds including a first organic compound and a second organic compound, and a difference in vapor deposition temperature between the first organic compound and the second organic compound is 20° C. or less, and a difference between a PL maximum emission wavelength of the melt mixture and a PL maximum emission wavelength of any of the first organic compound and the second organic compound is within ±10 nm. The melt mixture is suitable as a host material of a light-emitting layer.

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