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Organic electroluminescent device comprising a first electron-transporting layer and a second electron-transporting layer
Organic electroluminescent device comprising a first electron-transporting layer and a second electron-transporting layer
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机译:有机电致发光器件,其包括第一电子传输层和第二电子传输层
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摘要
Disclosed is an organic electroluminescent device (organic EL device) which can achieve high efficiency and long lifetime even when driven at low voltage. The organic El device comprises at least a light-emitting layer and an electron-transporting layer between an anode and a cathode facing each other. The electron-transporting layer consists of two layers, namely, a first electron-transporting layer and a second electron-transporting layer and the first electron-transporting layer and the second electron-transporting layer are arranged sequentially in this order from the light-emitting layer side to the cathode side. The first electron-transporting layer contains an indole derivative in which the ring nitrogen atom is substituted with an aromatic group and an aromatic ring is fused to the indole ring.
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