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:
Oct. 04, 2016
Filed:
Dec. 21, 2010
Junya Ogawa, Kitakyushu, JP;
Takahiro Kai, Kitakyushu, JP;
Toshihiro Yamamoto, Kitakyushu, JP;
Megumi Matsumoto, Kitakyushu, JP;
Junya Ogawa, Kitakyushu, JP;
Takahiro Kai, Kitakyushu, JP;
Toshihiro Yamamoto, Kitakyushu, JP;
Megumi Matsumoto, Kitakyushu, JP;
NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD., Tokyo, JP;
Abstract
Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. The organic EL device of this invention comprises a light-emitting layer between an anode and a cathode piled one upon another on a substrate wherein the light-emitting layer contains a phosphorescent dopant and a 1,9-substituted carbazole compound as a host material. An example of the 1,9-substituted carbazole compound is represented by the following general formula (1). In formula (1), Ar is an aromatic hydrocarbon group or aromatic heterocyclic group; L is an aromatic hydrocarbon group or aromatic heterocyclic group; each of Rto Ris a hydrogen atom, an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group; n is an integer of 1 to 3.