Organic EL devices and production process thereof

US7402701B2 · kind B2 · utility

Assignees

• DENSO CORPORATION · JP
• Hodogaya Chemical Co., Ltd. · JP

Inventors

• Tetsuya Kato · Chiryu, JP
• Kazushige Kojima · Nagoya, JP
• Shigeru Kusano · Tokyo, JP
• Makoto Koike · Toyota, JP
• Atsushi Takesue · Koriyama, JP
• Mitsutoshi Anzai · Kawasaki, JP

Key dates

• Filing date: Jul 31, 2007
• Grant date: Jul 22, 2008
• Expiry date: Jul 31, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/917

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.