Idemitsu Kosan Company, Limited

Yongguk Lee

Kazuki Nishimura

Satomi Tasaki

Ryoji Maeda

Yuki Nakano

Yuichiro Kawamura

Taro Yamaki

Hiroaki Itoi

An organic electroluminescence device includes: an anode; a cathode; a first emitting layer, and a second emitting layer, in which the first emitting layer includes a first host material in a form of a first compound represented by a formula (1), the second emitting layer includes a second host material in a form of a second compound represented by a formula (2) and having at least one group represented by a formula (21), and the first emitting layer is in direct contact with the second emitting layer.

Organic electroluminescent element and electronic device

An organic electroluminescence device comprising: an anode, a cathode, and an emitting region between the anode and the cathode, wherein the emitting region comprises a first emitting layer and a second emitting layer, the first emitting layer and the second emitting layer are directly adjacent to each other, the first emitting layer is between the anode and the second emitting layer, and one of the first emitting layer and the second emitting layer comprises a compound having at least one deuterium atom.

Organic electroluminescence device and electronic apparatus

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Sodegaura, Japan

Yongguk Lee