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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 11072623 B1

PDFFull Text
Date of Patent:
Jul. 27, 2021

Filed:

Jul. 15, 2016

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

Applicant:

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

Inventors:

Satoshi Seo, Kanagawa, JP;

Takao Hamada, Toyama, JP;

Assignee:

Semiconductor Energy Laboratory Co., Ltd.;

Attorney:

Husch Blackwell LLP

Primary Examiner:

Jay Yang

Int. Cl.
CPC ...
H01L 51/00 (2006.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01); G06F 3/045 (2006.01); C09K 11/06 (2006.01); C07F 15/00 (2006.01); H01L 51/50 (2006.01); H05B 33/14 (2006.01); H05B 33/20 (2006.01);
U.S. Cl.
CPC ...
C07F 15/0033 (2013.01); C09K 11/06 (2013.01); G06F 3/045 (2013.01); G06F 3/0412 (2013.01); H01L 51/0051 (2013.01); H01L 51/0085 (2013.01); H01L 51/5004 (2013.01); H01L 51/5016 (2013.01); H05B 33/14 (2013.01); H05B 33/20 (2013.01); C09K 2211/1007 (2013.01); C09K 2211/1044 (2013.01); C09K 2211/1059 (2013.01); C09K 2211/185 (2013.01); G06F 3/0443 (2019.05); G06F 3/0446 (2019.05); G06F 2203/04102 (2013.01); G06F 2203/04111 (2013.01); H01L 51/006 (2013.01); H01L 51/0052 (2013.01); H01L 51/0061 (2013.01); H01L 51/0067 (2013.01); H01L 51/0071 (2013.01); H01L 51/0072 (2013.01); H01L 51/0074 (2013.01); H01L 51/5028 (2013.01); H01L 51/5056 (2013.01); H01L 51/5072 (2013.01); H01L 2251/5384 (2013.01); H01L 2251/552 (2013.01);
Abstract

Provided is a light-emitting element including a first organic compound, a second organic compound, and a guest material. The LUMO level of the first organic compound is lower than that of the second organic compound. The HOMO level of the first organic compound is lower than that of the second organic compound. The LUMO level of the guest material is higher than that of the first organic compound. The HOMO level of the guest material is higher than that of the second organic compound. An energy difference between the LUMO level and the HOMO level of the guest material is larger than an energy difference between the LUMO level of the first organic compound and the HOMO level of the second organic compound. The guest material can convert triplet excitation energy into light emission. The combination of first organic compound and the second organic compound can form an exciplex.

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