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:
May. 29, 2018
Filed:
Jul. 30, 2013
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Harue Osaka, Kanagawa, JP;
Hiroshi Kadoma, Kanagawa, JP;
Yasushi Kitano, Kanagawa, JP;
Satoko Shitagaki, Kanagawa, JP;
Nobuharu Ohsawa, Kanagawa, JP;
Satoshi Seo, Kanagawa, JP;
Abstract
A light-emitting element with low drive voltage, a light-emitting element with high current efficiency, and/or a light-emitting element with a long lifetime are/is provided. Specifically, a light-emitting element with low drive voltage, a light-emitting element with high current efficiency, and/or a light-emitting element with a long lifetime are/is provided by the use of an organic compound with a dibenzo[f,h]quinoxaline skeleton in a light-emitting layer. In a light-emitting element which includes a light-emitting layer containing an organic compound between a pair of electrodes, the organic compound has a 2,3-unsubstituted dibenzo[f,h]quinoxaline skeleton, a hole-transport skeleton selected from a substituted or unsubstituted dibenzothiophene skeleton, a substituted or unsubstituted dibenzofuran skeleton, and a substituted or unsubstituted carbazole skeleton, and an arylene skeleton, and the 2,3-unsubstituted dibenzo[f,h]quinoxaline skeleton and the hole-transport skeleton are bonded through the arylene skeleton.