ORGANIC ELECTROLUMINESCENT DEVICE

Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime. This organic EL device comprises one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers contains a first host,...

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Bibliographische Detailangaben
Hauptverfasser: TERADA, Ayaka, TADA, Masashi, INOUE, Munetomo, SAGARA, Yuta
Format: Patent
Sprache:eng
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Zusammenfassung:Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime. This organic EL device comprises one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers contains a first host, a second host, and a light emitting dopant; the first host is a carbazole compound or a bicarbazole compound; the second host is an indolocarbazole compound; and the light emitting dopant is a polycyclic aromatic compound represented by the general formula (4) or a polycyclic aromatic compound having this structure as a partial structure. In the formula, Y4 is B, P, P═O, P═S, AL, Ga, As, Si-R4, or Ge-R41, and X4 is O, N-Ar4, S, or Se.