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首页> 美国卫生研究院文献>Materials >Solution-Processed Efficient Blue Phosphorescent Organic Light-Emitting Diodes (PHOLEDs) Enabled by Hole-Transport Material Incorporated Single Emission Layer
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Solution-Processed Efficient Blue Phosphorescent Organic Light-Emitting Diodes (PHOLEDs) Enabled by Hole-Transport Material Incorporated Single Emission Layer

机译：通过空穴传输材料的溶液加工有效的蓝色磷光有机发光二极管（Pholeds）掺入单一发射层

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摘要

Solution-processed blue phosphorescent organic light-emitting diodes (PHOLEDs) based on a single emission layer with small-molecule hole-transport materials (HTMs) are demonstrated. Various HTMs have been readily incorporated by solution-processing to enhance hole-transport properties of the polymer-based emission layer. Poly(N-vinylcarbazole) (PVK)-based blue emission layer with iridium(III) bis(4,6-(di-fluorophenyl)pyridinato-N,C2′)picolinate (FIrpic) triplet emitter blended with solution-processed 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) gave luminous efficiency of 21.1 cd/A at a brightness of 6220 cd/m2 with an external quantum efficiency (EQE) of 10.6%. Blue PHOLEDs with solution-incorporated HTMs turned out to be 50% more efficient compared to the reference device without HTMs. The high hole mobility, high triplet energy of HTM, and favorable energy transfer between HTM blended PVK host and FIrpic blue dopant were found to be important factors for achieving high device performance. The results are instructive to design and/or select proper hole-transport materials in solution-processed single emission layer.
机译：证明了基于单分子孔输送材料（HTMS）的单个发光层的溶液加工的蓝磷光有机发光二极管（Pholeds）。通过溶液加工容易地掺入各种HTM以增强基于聚合物的发光层的空穴传输性质。聚（N-乙烯基咔唑）（PVK）基于铱（III）双（4,6-（二氟苯基）吡啶-N，C2'）吡啶酸盐（FIRPIC）三重态发射器与溶液加工1的蓝色发光层 - 1-BIS [（二-4--甲酸氨基）苯基]环己烷（TAPC）在6220cd / m 2的亮度下发光效率，外量子效率（EQE）为10.6％。与没有HTM的参考装置相比，具有解决方案的HTMS的蓝色Pholed oply效率更高。发现HTM的高空穴迁移率，高三态能量，以及HTM混合PVK主机和FIRPIC蓝掺杂剂之间的有利能量转移是实现高器件性能的重要因素。结果是设计和/或在溶液加工单个发光层中选择适当的空穴传输材料的有助感。

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