Diphenylamine/triazine hybrids as bipolar hosts for phosphorescent organic light-emitting diodes
作者:Yaxing Zhang、Yuanyuan Zheng、Binyan Wang、Huijuan Ran、Xiaoli Wang、Jian-Yong Hu、Qiang Wang
DOI:10.1039/c9tc06731k
日期:——
properties of the hybrids. The triplet excited state energy (ET) values of DPA–TRZ, DDPA–TRZ, and TDPA–TRZ are 2.38, 2.51, and 2.73 eV, respectively. To evaluate the electroluminescence properties of the three host materials, blue, green, red, and white phosphorescent OLEDs (PhOLEDs) were fabricated and characterized. With the highest ET value, TDPA–TRZ can afford from blue to red phosphorescent emitters
使用二苯胺(DPA)作为施主单元和三嗪(TRZ)作为受主单元的双极性主体材料可以实现合适的能级和平衡的电荷传输特性,这对于高性能有机发光二极管(OLED)而言是必需的。在这项工作中,三种基于DPA / TRZ的基质材料被称为2-(4-(N,N - N-二苯氨基)苯基)-4,6-二苯基-1,3,5-三嗪(DPA–TRZ),2,4 -双(4-(N,N-二苯氨基)苯基)-6-苯基-1,3,5-三嗪(DDPA-TRZ)和2,4,6-tris(4-(N,N-diphenylamino)phenyl)-1,3,5-triazine(TDPA–TRZ),被设计和合成。研究了它们的热,光物理,电化学和载流子传输性质,以揭示它们的分子结构与性质之间的关系。DPA单元的数量可以定期调整杂化体的光学和电学性质。DPA–TRZ,DDPA–TRZ和TDPA–TRZ的三重态激发态能量(E T)分别为2.38、2.51和2