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:
Jun. 28, 2011
Filed:
Nov. 21, 2007
Toshihiro Iwakuma, Chiba, JP;
Jun Endo, Chiba, JP;
Masaki Numata, Chiba, JP;
Kenichi Fukuoka, Chiba, JP;
Toshihiro Iwakuma, Chiba, JP;
Jun Endo, Chiba, JP;
Masaki Numata, Chiba, JP;
Kenichi Fukuoka, Chiba, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
A material for organic electroluminescence devices of the invention which is for use in combination with at least one phosphorescent metal complex has a specific heterocyclic structure. The material for organic electroluminescence devices is used as a host material or a hole transporting material. An organic electroluminescence device having an anode, a cathode and an organic thin film layer having one or more layers which is interposed between the anode and cathode, in which at least one layer of the organic thin film layer contains the material for organic electroluminescence devices, has a high emitting efficiency, causes little pixel defects, is excellent in heat resistance, and shows a long lifetime.