Versatile Benzimidazole/Triphenylamine Hybrids: Efficient Nondoped Deep-Blue Electroluminescence and Good Host Materials for Phosphorescent Emitters
作者:Shaolong Gong、Yongbiao Zhao、Meng Wang、Chuluo Yang、Cheng Zhong、Jingui Qin、Dongge Ma
DOI:10.1002/asia.201000206
日期:2010.9.3
conjugation between the donor and acceptor moieties. A nondoped deep‐blue fluorescent organic light‐emitting diode (OLED) using 1 as the blue emitter displays high performance, with a maximum current efficiency of 2.2 cd A−1 and a maximum external efficiency of 2.9 % at the CIE coordinates of (0.17, 0.07) that are very close to the National Television System Committee’s blue standard (0.15, 0.07). Electrophosphorescent
两种新的双极性化合物N,N,N',N'-四苯基-5'-(1-苯基-1 H-苯并咪唑-2-基)-1,1':3',1''-三联苯基-4 ,4''-二胺(1)和N,N,N',N'-四苯基-5'-(1-苯基-1 H-苯并咪唑-2-基)-1,1':3',1'合成并表征了'-terphenyl-3,3''-diamine(2),并研究了它们的热,光物理和电化学性质。化合物1和2具有良好的热稳定性,玻璃化转变温度为109-129°C,热分解温度为501-531°C。1(0.52)的荧光量子产率高于2(0.16),这可以归因于供体和受体部分之间更大的π共轭。使用1作为蓝色发射器的无掺杂深蓝色荧光有机发光二极管(OLED)显示高性能,在(0.17的CIE坐标下)最大电流效率为2.2 cd A -1,最大外部效率为2.9% ,0.07),非常接近国家电视系统委员会的蓝色标准(0.15,0.07)。使用这两种化