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:
Jan. 27, 2015
Filed:
Dec. 22, 2009
Yoriyuki Takashima, Chiba, JP;
Toshihiro Iwakuma, Chiba, JP;
Toshinari Ogiwara, Chiba, JP;
Chishio Hosokawa, Chiba, JP;
Mitsunori Ito, Chiba, JP;
Yoriyuki Takashima, Chiba, JP;
Toshihiro Iwakuma, Chiba, JP;
Toshinari Ogiwara, Chiba, JP;
Chishio Hosokawa, Chiba, JP;
Mitsunori Ito, Chiba, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
An organic electroluminescence device and a material for producing the organic electroluminescence device. The organic electroluminescence device includes an organic thin film layer between a cathode and an anode, the organic thin film layer including one or more layers, in which the organic thin film layer includes one or more light emitting layers and at least one of the light emitting layers includes a phosphorescent material and a host material. The host material has an essential structure in which a naphthalene ring is bonded to a fluorene skeleton, dibenzofuran skeleton, or dibenzothiophene skeleton. The organic electroluminescence device is a phosphorescent device having high efficiency and long lifetime.