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.:
Date of Patent:
Sep. 04, 2018
Filed:
Aug. 04, 2016
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Takao Hamada, Kanagawa, JP;
Hiromi Seo, Kanagawa, JP;
Kanta Abe, Kanagawa, JP;
Kyoko Takeda, Kanagawa, JP;
Satoshi Seo, Kanagawa, JP;
Abstract
A light-emitting element having a long lifetime is provided. A light-emitting element exhibiting high emission efficiency in a high luminance region is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains a first organic compound, a second organic compound, and a phosphorescent compound. The first organic compound is represented by a general formula (G0). The molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000. The second organic compound is a compound having an electron-transport property. In the general formula (G0), Arand Areach independently represent a fluorenyl group, a spirofluorenyl group, or a biphenyl group, and Arrepresents a substituent including a carbazole skeleton.