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. 30, 2011
Filed:
May. 28, 2008
Takahiro Kai, Kitakyushu, JP;
Masaki Komori, Kitakyushu, JP;
Toshihiro Yamamoto, Kitakyushu, JP;
Katsuhide Noguchi, Kitakyushu, JP;
Hiroshi Miyazaki, Kitakyushu, JP;
Takahiro Kai, Kitakyushu, JP;
Masaki Komori, Kitakyushu, JP;
Toshihiro Yamamoto, Kitakyushu, JP;
Katsuhide Noguchi, Kitakyushu, JP;
Hiroshi Miyazaki, Kitakyushu, JP;
Nippon Steel Chemical Co., Ltd., Tokyo, JP;
Abstract
Disclosed are an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and of simple constitution and a compound useful for the fabrication of said organic EL device. The compound for the organic EL device has an indolocarbazole structure or a structure similar thereto in the molecule wherein an aromatic group is bonded to the nitrogen atom in the indolocarbazole. The organic EL device has a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and said light-emitting layer comprises a phosphorescent dopant and the aforementioned compound for an organic electroluminescent device as a host material.