To obtain both improvement in luminance life span and heat-resistant of 100°C or higher in an organic electroluminescent (EL) element which comprises pinching a light-emitting layer between a pair of electrodes, the light-emitting layer comprising a mixture of a hole-transporting material, an electron-transporting material, and a light-emitting additive material.
The organic electroluminescent element comprises pinching a light-emitting layer 50 between a pair of electrodes 20, 80, the light-emitting layer 50 comprising a mixture of a hole-transporting material comprising a tertiary amine compound, an electron-transporting material, and a light-emitting additive material, wherein the tertiary amine compound has two or more oxidation potentials determined by a cyclic voltammetry method, a potential difference between the first oxidation potential and the second oxidation potential in the oxidation potentials is at least 0.22 V, and a glass transition temperature is at least 100°C, and wherein the electron-transporting material has a glass transition temperature of at least 100°C.
COPYRIGHT: (C)2009,JPO&INPIT
Kazushige Kojima
Takanori Kajioka
Masahiko Ishii
保土谷化学工業株式会社
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| JP7126226A | ||||
| JP2003146950A | ||||
| JP2002179630A |
Takahiro Miura
Fumihiro Mizuno