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:
Aug. 15, 2017
Filed:
Jun. 22, 2015
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Satoshi Seo, Kanagawa, JP;
Harue Osaka, Kanagawa, JP;
Sachiko Kawakami, Kanagawa, JP;
Nobuharu Ohsawa, Kanagawa, JP;
Tsunenori Suzuki, Kanagawa, JP;
Hiromi Nowatari, Kanagawa, JP;
Hiroki Suzuki, Kanagawa, JP;
Kyoko Takeda, Kanagawa, JP;
Abstract
An object is to provide a light-emitting element with high emission efficiency which includes a novel carbazole derivative that has a wide energy gap and can be used for a transport layer or a host material in a light-emitting element. A carbazole derivative in which the 4-position of dibenzothiophene or dibenzofuran is bonded to the 2- or 3-position of carbazole has been able to be provided by use of the carbazole derivative. Further, a light-emitting element having high emission efficiency has been able to be provided by use of the carbazole derivative.