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:
Jul. 24, 2012
Filed:
Mar. 24, 2008
Takahiro Kai, Kitakyushu, JP;
Toshihiro Yamamoto, Kitakyushu, JP;
Masanori Hotta, Kitakyushu, JP;
Junya Ogawa, Kitakyushu, JP;
Takahiro Kai, Kitakyushu, JP;
Toshihiro Yamamoto, Kitakyushu, JP;
Masanori Hotta, Kitakyushu, JP;
Junya Ogawa, Kitakyushu, JP;
Nippon Steel Chemical Co., Ltd., Tokyo, JP;
Abstract
Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and of simple constitution. Also disclosed is a compound useful for the fabrication of said organic EL device. The organic electroluminescent device comprises organic layers including a light-emitting layer disposed between an anode and a cathode which are piled one upon another on a substrate and said organic layers comprise a compound represented by general formula (1). A light-emitting layer containing a phosphorescent dopant is suitable for an organic layer comprising a compound represented by general formula (1). In general formula (1), X is CR or N; Arto Areach is a substituted or unsubstituted aromatic hydrocarbon group or a substituted or unsubstituted aromatic heterocyclic group; Ar, Arand the nitrogen to which Arand Arare joined may together form a nitrogen-containing heterocyclic ring; m and n each is an integer of 1 or 2 and the sum of m and n is 3.