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:
Jul. 22, 2008
Filed:
Jul. 31, 2007
Tetsuya Kato, Anjo, JP;
Kazushige Kojima, Aichi-gun, JP;
Shigeru Kusano, Tsukuba, JP;
Makoto Koike, Koriyama, JP;
Atsushi Takesue, Koriyama, JP;
Mitsutoshi Anzai, Kawasaki, JP;
Tetsuya Kato, Anjo, JP;
Kazushige Kojima, Aichi-gun, JP;
Shigeru Kusano, Tsukuba, JP;
Makoto Koike, Koriyama, JP;
Atsushi Takesue, Koriyama, JP;
Mitsutoshi Anzai, Kawasaki, JP;
DENSO CORPORATION, Kariya, JP;
Hodogaya Chemical Co., Ltd., Kanagawa-pref, JP;
Abstract
An organic electroluminescent device comprising a light-emitting layer between a pair of electrodes, the light-emitting layer comprising a mixture of a hole-transporting material consisting of a tertiary amine compound, an electron-transporting material and a light-emitting additive material, in which the tertiary amine compound has two or more oxidation potentials determined by a cyclic voltammetry wherein a potential difference between the first oxidation potential and the second oxidation potential in the oxidation potentials is 0.22V or more, and a glass transition temperature of at least 100° C., and the electron-transporting material has a glass transition temperature of at least 100° C.