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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 12250870 B1

PDFFull Text
Date of Patent:
Mar. 11, 2025

Filed:

Mar. 16, 2020

Light emitting device and production method thereof, and composition for light emitting device and production method thereof

Applicant:

Sumitomo Chemical Company, Limited, Tokyo, JP;

Inventors:

Toshiaki Sasada, Tsukuba, JP;

Ryuji Matsumoto, Nomi, JP;

Assignee:

SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;

Attorney:

Panitch Schwarze Belisario & Nadel LLP

Primary Examiner:

Gregory D Clark

Int. Cl.
CPC ...
H01L 51/50 (2006.01); C07C 15/28 (2006.01); C07D 409/14 (2006.01); C07F 5/02 (2006.01); C09K 11/06 (2006.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 50/12 (2023.01);
U.S. Cl.
CPC ...
H10K 85/322 (2023.02); C07C 15/28 (2013.01); C07D 409/14 (2013.01); C07F 5/027 (2013.01); C09K 11/06 (2013.01); H10K 85/626 (2023.02); H10K 85/6572 (2023.02); H10K 85/6576 (2023.02); C07C 2603/24 (2017.05); C09K 2211/1007 (2013.01); C09K 2211/1011 (2013.01); C09K 2211/1018 (2013.01); H10K 50/121 (2023.02);
Abstract

A light emitting device including an anode, a cathode, and an organic layer disposed between the anode and the cathode and containing a composition is provided. The composition contains two or more compounds (B) having a condensed hetero ring skeleton (b) containing a boron atom and a nitrogen atom in the ring. Compound (B) contains a compound (B1) and a compound (B2) which satisfy at least one of the following formulas: EB1<EB2 and AB1<AB2. EB1 represents the maximum peak wavelength of the emission spectrum at 25° C. of compound (B1), EB2 represents the maximum peak wavelength of the emission spectrum at 25° C. of compound (B2), AB1 represents the peak wavelength at the lowest energy side of the absorption spectrum at 25° C. of compound (B1), and AB2 represents the peak wavelength at the lowest energy side of the absorption spectrum at 25° C. of compound (B2).

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