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:
Sep. 06, 2011
Filed:
May. 23, 2008
Masaki Komori, Kitakyushu, JP;
Toshihiro Yamamoto, Kitakyushu, JP;
Takahiro Kai, Kitakyushu, JP;
Katsuhide Noguchi, Kitakyushu, JP;
Hiroshi Miyazaki, Kitakyushu, JP;
Masaki Komori, Kitakyushu, JP;
Toshihiro Yamamoto, Kitakyushu, JP;
Takahiro Kai, Kitakyushu, JP;
Katsuhide Noguchi, Kitakyushu, JP;
Hiroshi Miyazaki, Kitakyushu, JP;
Nippon Steel Chemical Co., Ltd, Tokyo, JP;
Abstract
Disclosed are a compound for an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and of simple constitution and an organic EL device using said compound. The compound for an organic EL device has two indolocarbazole skeletons each of which is bonded to an aromatic group or two skeletons similar thereto. The organic EL device comprises 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 EL device as a host material.