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:
Dec. 04, 2018
Filed:
May. 26, 2016
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Tetsuya Inoue, Chiba, JP;
Mitsunori Ito, Chiba, JP;
Kumiko Gorai, Chiba, JP;
Kazuki Nishimura, Chiba, JP;
Kiyoshi Ikeda, Chiba, JP;
IDEMITSU KOSAN CO., LTD., Tokyo, JP;
Abstract
A biscarbazole derivative having a specific group, which is represented by formula (1): and an organic electroluminescence device in which a plurality of organic thin-film layers including a light emitting layer are disposed between a cathode and an anode, and at least one of the organic thin-film layers include the biscarbazole derivative. The organic electroluminescence device exhibits high emission efficiency and has a long lifetime. In formula (1), each of Aand Aindependently represents a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms; each of Yto Yindependently represents C(R) or a nitrogen atom; each of R groups independently represents a hydrogen atom, etc.; and each of Land Lindependently represents a single bond, etc.; provided that at least one of A, Aand R represents a substituted or unsubstituted fluoranthenyl group, etc.