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. 12, 2014
Filed:
Feb. 06, 2012
Tetsuya Inoue, Chiba, JP;
Mitsunori Ito, Chiba, JP;
Tomoki Kato, Chiba, JP;
Kumiko Hibino, Chiba, JP;
Kazuki Nishimura, Chiba, JP;
Takayasu Sado, Chiba, JP;
Tetsuya Inoue, Chiba, JP;
Mitsunori Ito, Chiba, JP;
Tomoki Kato, Chiba, JP;
Kumiko Hibino, Chiba, JP;
Kazuki Nishimura, Chiba, JP;
Takayasu Sado, Chiba, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.