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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 11944010 B1

PDFFull Text
Date of Patent:
Mar. 26, 2024

Filed:

Jun. 29, 2022

Organic electroluminescent device

Applicant:

Kyulux, Inc., Fukuoka, JP;

Inventors:

Hajime Nakanotani, Fukuoka, JP;

Chihaya Adachi, Fukuoka, JP;

Takahiro Higuchi, Fukuoka, JP;

Taro Furukawa, Fukuoka, JP;

Assignee:

KYULUX, INC., Fukuoka, JP;

Attorney:

BROWDY AND NEIMARK, PLLC

Primary Examiner:

Bethany L Martin

Int. Cl.
CPC ...
H10K 85/60 (2023.01); C09K 11/06 (2006.01); H10K 50/11 (2023.01); H10K 50/12 (2023.01); H10K 85/30 (2023.01); H10K 101/10 (2023.01); H10K 101/30 (2023.01);
U.S. Cl.
CPC ...
H10K 85/6572 (2023.02); C09K 11/06 (2013.01); H10K 50/11 (2023.02); H10K 50/121 (2023.02); H10K 85/622 (2023.02); H10K 85/654 (2023.02); H10K 85/656 (2023.02); H10K 85/657 (2023.02); C09K 2211/1011 (2013.01); C09K 2211/1014 (2013.01); C09K 2211/1033 (2013.01); C09K 2211/1044 (2013.01); C09K 2211/1074 (2013.01); C09K 2211/1077 (2013.01); C09K 2211/186 (2013.01); H10K 85/324 (2023.02); H10K 85/631 (2023.02); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02);
Abstract

An organic electroluminescent device having an anode, a cathode, and a light emitting layer between the anode and the cathode, in which the light emitting layer contains a first organic compound, a second organic compound, and a third organic compound that satisfy the following expression (A), the second organic compound is a delayed fluorescent material, and the third organic compound is a light emitting material, is capable of enhancing the light emission efficiency. E(A), E(B) and E(C) represent a lowest, singlet excitation energy level of the first, second and third organic compound, respectively.E(A)>E(B)>E(C)  (A)

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