Efficient Vacuum-Processed Light-Emitting Diodes Based on Carbene-Metal-Amides
Efficient Vacuum-Processed Light-Emitting Diodes Based on Carbene-Metal-Amides
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DOI：
10.1002/adma.201802285
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发表时间：
2018-08-29
影响因子：
29.4
通讯作者：
Credgington, Dan
中科院分区：
文献类型：
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作者：
Conaghan, Patrick J.;Menke, S. Matthew;Credgington, Dan
利用卡宾-金属-酰胺材料CMA1制备了高效真空处理有机电致发光二极管。在由纯CMA1组成的无主机发射层中，获得了23%的电致发光(EL)外量子效率。此外，在主客体发射层中实现了高达26.9%的外量子效率。电致发光光谱与发射层掺杂浓度和基质材料的选择有关，可以在不改变掺杂剂的情况下将发射颜色从中绿(国际L委员会的坐标[0.24，0.46])调整到天蓝色([0.22，0.35])。这种调谐是在不影响发光效率(>；80%)的情况下实现的，同时保持了较短的三重态辐射寿命(
Efficient vacuum-processed organic light-emitting diodes are fabricated using a carbene-metal-amide material, CMA1. An electroluminescence (EL) external quantum efficiency of 23% is achieved in a host-free emissive layer comprising pure CMA1. Furthermore external quantum efficiencies of up to 26.9% are achieved in host-guest emissive layers. EL spectra are found to depend on both the emissive-layer doping concentration and the choice of host material, enabling tuning of emission color from mid-green (Commission Internationale de l'Eclairage co-ordinates [0.24, 0.46]) to sky blue ([0.22 0.35]) without changing dopant. This tuning is achieved without compromising luminescence efficiency (>80%) while maintaining a short radiative lifetime of triplets (