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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 12268088 B1

PDFFull Text
Date of Patent:
Apr. 01, 2025

Filed:

Dec. 27, 2017

Light emission material and organic electroluminescence device including the same

Applicant:

Samsung Display Co., Ltd., Yongin-Si, KR;

Inventors:

Junta Fuchiwaki, Yokohama, JP;

Tohru Sato, Kyoto-si, JP;

Assignee:

Samsung Display Co., Ltd., Yongin-si, KR;

Attorney:

Womble Bond Dickinson (US) LLP

Primary Examiner:

Jenna N Chandhok

Int. Cl.
CPC ...
H10K 85/60 (2023.01); C07D 209/86 (2006.01); C07D 209/88 (2006.01); C07D 221/08 (2006.01); C07F 7/08 (2006.01); C09K 11/02 (2006.01); C09K 11/06 (2006.01); H10K 50/11 (2023.01); H10K 50/12 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); H10K 50/81 (2023.01); H10K 50/82 (2023.01); H10K 85/40 (2023.01); H10K 101/30 (2023.01); H10K 101/40 (2023.01);
U.S. Cl.
CPC ...
H10K 85/6572 (2023.02); C07D 209/86 (2013.01); C07D 209/88 (2013.01); C07D 221/08 (2013.01); C07F 7/0814 (2013.01); C07F 7/0816 (2013.01); C09K 11/025 (2013.01); C09K 11/06 (2013.01); H10K 50/11 (2023.02); H10K 85/40 (2023.02); H10K 85/60 (2023.02); H10K 85/622 (2023.02); C09K 2211/1007 (2013.01); C09K 2211/1014 (2013.01); H10K 50/121 (2023.02); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/17 (2023.02); H10K 50/171 (2023.02); H10K 50/81 (2023.02); H10K 50/82 (2023.02); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02);
Abstract

A light emission material includes a first compound satisfying Equation 1:2≥0.11.  Equation 1In Equation 1, K1 is a sum of radiationless transition rate due to internal conversion from a certain specific n-th triplet excitation state to a lower order triplet excitation state including the lowest triplet excitation state, K2 is a reverse intersystem crossing transition rate from the certain specific n-th triplet excitation state to a singlet excitation state which is adjacent to the n-th triplet excitation state, and n is an integer of 2 or more. An organic electroluminescence device including the light emission material may simultaneously attain high emission efficiency and roll-off reduction.

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