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. 25, 2002
Filed:
Aug. 20, 1997
Hisamitsu Takahashi, Mobara, JP;
Yoshihisa Tsuruoka, Mobara, JP;
Satoshi Tanaka, Mobara, JP;
Toshio Miyauchi, Mobara, JP;
Futaba Corporation, Mobara, JP;
Abstract
An organic electroluminescence (EL) device doping material which is thermally stable, having a high melting point, and doping with which improves stability of a luminous layer formed as a thin layer. An organic EL device comprises a glass substrate an anode made of transparent indium tin oxide (ITO), an electron hole implanted transporting layer of TPD, a luminous layer and a cathode made of Mg. The luminous layer is made of Alq doped with 1 mol % of Al O (SABF) as a metal chelate complex having ligands composed of SABF skeletons. When plus DC voltage is applied to the anode and minus DC voltage, to the cathode the luminous layer emits yellow electroluminescence of 16400 cd/m at maximum with 15 V. The external quantum yield was 0.1891 m/W. The luminous layer of the organic EL device is thermally stable and hard to be deteriorated.