Idemitsu Kosan Company, Limited

Kumiko Gorai

Kazuki Nishimura

Mitsunori Ito

Tetsuya Inoue

Tomoki Kato

Takayasu Sado

Kiyoshi Ikeda

A biscarbazole derivative having a specific group, which is represented by formula (1); and an organic electroluminescence device in which a plurality of organic thin-film layers including a light emitting layer are disposed between a cathode and an anode, and at least one of the organic thin-film layers include the biscarbazole derivative. The organic electroluminescence device exhibits high emission efficiency and has a long lifetime. In formula (1), each of Aand Aindependently represents a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms; each of Yto Yindependently represents C(R) or a nitrogen atom; each of R groups independently represents a hydrogen atom, etc.; and each of Land Lindependently represents a single bond, etc.; provided that at least one of A, Aand R represents a substituted or unsubstituted fluoranthenyl group, etc.

Biscarbazole derivative and organic electroluminescent element using same

Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.

Biscarbazole derivatives and organic electroluminescence device employing the same

A biscarbazole derivative having a specific group, which is represented by formula (1): and an organic electroluminescence device in which a plurality of organic thin-film layers including a light emitting layer are disposed between a cathode and an anode, and at least one of the organic thin-film layers include the biscarbazole derivative. The organic electroluminescence device exhibits high emission efficiency and has a long lifetime. In formula (1), each of Aand Aindependently represents a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms; each of Yto Yindependently represents C(R) or a nitrogen atom; each of R groups independently represents a hydrogen atom, etc.; and each of Land Lindependently represents a single bond, etc.; provided that at least one of A, Aand R represents a substituted or unsubstituted fluoranthenyl group, etc.

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Chiba, Japan

Kumiko Gorai