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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 10749112 B1

PDFFull Text
Date of Patent:
Aug. 18, 2020

Filed:

Apr. 16, 2019

Light-emitting element, display device, electronic device, and lighting device

Applicant:

Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;

Inventors:

Satoshi Seo, Kanagawa, JP;

Tatsuyoshi Takahashi, Kanagawa, JP;

Kyoko Takeda, Kanagawa, JP;

Kanta Abe, Kanagawa, JP;

Hiroki Suzuki, Kanagawa, JP;

Assignee:

Semiconductor Energy Laboratory Co., Ltd., , JP;

Attorney:

Husch Blackwell LLP

Primary Examiner:

Kyoung Lee

Int. Cl.
CPC ...
H01L 51/00 (2006.01); H01L 27/32 (2006.01); C07F 15/00 (2006.01); C09K 11/06 (2006.01); G06F 3/041 (2006.01); G06F 3/045 (2006.01); H01L 51/50 (2006.01); H05B 33/14 (2006.01); H05B 33/20 (2006.01);
U.S. Cl.
CPC ...
H01L 51/0051 (2013.01); C07F 15/0033 (2013.01); C09K 11/06 (2013.01); G06F 3/045 (2013.01); G06F 3/0412 (2013.01); H01L 27/3267 (2013.01); H01L 51/0059 (2013.01); H01L 51/0061 (2013.01); H01L 51/0067 (2013.01); H01L 51/0072 (2013.01); H01L 51/0074 (2013.01); H01L 51/5004 (2013.01); H01L 51/5028 (2013.01); H01L 51/5056 (2013.01); H01L 51/5072 (2013.01); H05B 33/14 (2013.01); H05B 33/20 (2013.01); H01L 51/0085 (2013.01); H01L 51/5016 (2013.01); H01L 2251/5384 (2013.01); H01L 2251/552 (2013.01);
Abstract

A light-emitting element with a lower voltage and higher emission efficiency is provided. The light-emitting element includes a first organic compound, a second organic compound, and a guest material. The LUMO level of the first organic compound is lower than the LUMO level of the second organic compound, and a difference between them is larger than 0 eV and smaller than or equal to 0.5 eV. Furthermore, the HOMO level of the first organic compound is lower than the HOMO level of the second organic compound. The guest material has a function of converting triplet excitation energy into light emission. The first organic compound and the second organic compound form an exciplex.

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