Bando Chemical Industries, Inc.

Pioneer Electronic Corporation

Other

Hiroshi Inada

Takeo Wakimoto

Kunio Imai

Yasuhiko Shirota

Tomokazu Kobata

Nobutaka Akashi

Tomoko Hayashi

Yasuhiro Shirota

Yoshinobu Yonemoto

The invention provides 1,3,5-tris(arylamino)benzenes represented by the general formula (I) wherein A is naphthyl, anthryl or phenanthryl group, and R is hydrogen atom or diarylamino group. These 1,3,5-tris(arylamino)benzenes have oxidation potentials in the range of about 0.5-0.6V, excellent reversibility in oxidation-reduction process, high glass transition temperatures and high heat resistance, so that they can form practicable organic semiconductor film readily by a coating method or a vacuum deposition method. In addition, they are capable of forming stable and durable amorphous film useful as high performance organic semiconductors at normal temperatures or higher with no aid of binder resins, that is, by themselves.

1,3,5-tris (arylamino) benzenes

An organic electroluminescent device comprises an organic emitting layer and a hole transport layer laminated with each other and arranged between a cathode and an anode, in characterized in that the hole transport layer made of the triphenylbenzene derivative. This hole transport layer has the high heart-resistant property and high conductivity to improve the durability and thus this device emits light at a high luminance and a high efficiency upon application of a low voltage.

Organic electroluminescent device

An organic electroluminescent device having an organic emitting layer and a hole transport layer laminated with each other and arranged between a cathode and an anode, and the hole transport layer is made of tris-phenothiazinyl-triphenylamine or tris-phenoxazinyl-triphenylamine derivative. The hole transport layer has a high heat-resistant property and high conductivity to improve durability and emits light at a high luminance and a high efficiency upon application of a low voltage.

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Kobe, Japan

Hiroshi Inada