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:
Feb. 21, 2012
Filed:
Oct. 10, 2006
Hiroshi Miyazaki, Kitakyushu, JP;
Natsumi Henzan, Kitakyushu, JP;
Hiroshi Miyazaki, Kitakyushu, JP;
Natsumi Henzan, Kitakyushu, JP;
Nippon Steel Chemical Co., Ltd., Tokyo, JP;
Abstract
Disclosed is an organic electroluminescent device (organic EL device) utilizing phosphorescence which is improved in luminous efficiency and sufficiently secured of driving stability. The organic EL device comprises an anode, organic layers containing a hole-transporting layer, a light-emitting layer, and an electron-transporting layer, and a cathodepiled one upon another on a substrate, the hole-transporting layer is disposed between the light-emitting layer and the anode, the electron-transporting layer is disposed between the light-emitting layer and the cathode, and the light-emitting layer comprises an organic Al complex represented by the following general formula (I) as a host material and an organic Ir complex represented by the following general formula (II) as a guest material. In formula (I), L is ArO—, ArCOO—, ArSiO—, ArGeO—, or ArAlO—.