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:
Jul. 13, 2021
Filed:
Dec. 19, 2017
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Takeyoshi Watabe, Kanagawa, JP;
Satoshi Seo, Kanagawa, JP;
Nozomi Komatsu, Kanagawa, JP;
Ryohei Yamaoka, Kanagawa, JP;
Harue Osaka, Kanagawa, JP;
Kunihiko Suzuki, Kanagawa, JP;
Shunsuke Hosoumi, Kanagawa, JP;
Abstract
A highly reliable light-emitting element having high emission efficiency is provided. The light-emitting element includes a light-emitting layer including a first organic compound and a guest material. The first organic compound has a substituted or unsubstituted carbazole skeleton. In the light-emitting layer, the weight ratio of a hydrocarbon group substitution product in which at least one of hydrogen atoms in the first organic compound is substituted by a hydrocarbon group having 1 to 6 carbon atoms to the first organic compound is greater than 0 and less than or equal to 0.1.