Idemitsu Kosan Company, Limited

Hiroshi Tokairin

Chishio Hosokawa

Kenichi Fukuoka

Toshio Sakai

An organic electroluminescence device which comprises a pair of electrodes comprising an anode and a cathode and a layer of organic compounds comprising at least an organic light emitting layer and disposed between the pair of electrodes, wherein the layer of organic compounds comprises a light emitting material and a bis-condensed aromatic cyclic compound. The organic electroluminescence device exhibits suppressed crystallization in driving for a long time or in environments at high temperatures, has improved durability and is advantageously used in practical applications.

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Chiba, Japan

Hiroshi Tokairin