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Improved performance and stability by an Al/Ni bilayer cathode in organic light-emitting diodes

机译:Al / Ni双层阴极在有机发光二极管中的性能和稳定性得到改善

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摘要

Al/Ni bilayer cathode was used to improve the electroluminescent (EL) efficiency and stability in N,N'-bis(1-naphthyl)-N,N'-diphenyl-1,1' biphenyl 4,4'-dimaine (NPB)/tris-(8-hydroxyquinoline) aluminum (Alq(3))-based organic light-emitting diodes. The device with LiF/Al/Ni cathode achieved a maximum power efficiency of 2.8 lm/W at current density of 1.2 mA/cm(2), which is 1.4 times the efficiency of device with the state-of-the-art LiF/Al cathode. Importantly, the device stability was significantly enhanced due to the utilization of LiF/Al/Ni cathode. The lifetime at 30% decay in luminance for LiF/Al/Ni cathode was extrapolated to 400 It at an initial luminance of 100 cd/m(2), which is 10 times better than the LiF/Al cathode. (c) 2006 Elsevier B.V. All rights reserved.
机译:使用Al / Ni双层阴极来提高N,N'-双(1-萘基)-N,N'-二苯基-1,1'联苯4,4'-二胺(NPB)中的电致发光(EL)效率和稳定性)/三(8-羟基喹啉)铝(Alq(3))基有机发光二极管。具有LiF / Al / Ni阴极的器件在1.2 mA / cm(2)的电流密度下实现了2.8 lm / W的最大功率效率,是采用最新LiF /器件的效率的1.4倍。铝阴极。重要的是,由于使用了LiF / Al / Ni阴极,因此大大提高了器件的稳定性。将LiF / Al / Ni阴极在亮度衰减30%时的寿命推算为400 It,初始亮度为100 cd / m(2),这是LiF / Al阴极的10倍。 (c)2006 Elsevier B.V.保留所有权利。

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