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. 15, 2015
Filed:
Feb. 07, 2011
Takahiro Kai, Kitakyushu, JP;
Masaki Komori, Kitakyushu, JP;
Toshihiro Yamamoto, Kitakyushu, JP;
Megumi Matsumoto, Kitakyushu, JP;
Takahiro Kai, Kitakyushu, JP;
Masaki Komori, 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) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. This organic EL device has a light-emitting layer between an anode and a cathode piled one upon another on a substrate and the said light-emitting layer contains a fused polycyclic compound in which seven or more rings are fused together as a host material. The aforementioned fused polycyclic compound has a structure formed by fusing two or more indole rings to a carbazole ring. A specific example thereof is the compound represented by the following formula.