Department of New Materials Chemistry, Korea University, Chungnam, 330-700, South Korea.
ChemSusChem. 2012 Oct;5(10):2045-52. doi: 10.1002/cssc.201200242. Epub 2012 Aug 7.
New electron-rich anthracene derivatives containing triarylamine hole stabilizers, 2,6-bis[5,5'-bis(N,N'-diphenylaniline)-2,2'-bithiophen-5-yl]-9,10-bis-[(triisopropylsilyl)ethynyl]anthracene (TIPSAntBT-TPA) and 2,6-bis(5,5'-bis{4-[bis(9,9-dimethyl-9H-fluoren-2-yl)amino]phenyl}-2,2'-bithiophen-5-yl)-9,10-bis-[(triisopropylsilyl)ethynyl]anthracene (TIPSAntBT-bisDMFA), linked with π-conjugated bithiophene bridges, were synthesized and their photovoltaic characteristics were investigated in solution-processed small-molecule organic solar cells (SMOSCs). These new materials exhibited superior intramolecular charge transfer from triarylamine to anthracene, leading to a more electron-rich anthracene core that facilitated electron transfer into phenyl-C(61)-butyric acid methyl ester. Compared with TIPSAntBT and triarylamine, these materials show a threefold improvement in hole-transporting properties and better photovoltaic performance in solution-processed SMOSCs, with the best power conversion efficiency being 2.96 % at a high open-circuit voltage of 0.85 V.
含有三苯胺空穴稳定剂的新型富电子蒽衍生物，2,6-双[5,5'-双（N,N'-二苯基苯胺）-2,2'-联噻吩-5-基]-9,10-双[（三异丙基硅基）乙炔基]蒽（TIPSAntBT-TPA）和 2,6-双（5,5'-双{4-[双（9,9-二甲基-9H-芴-2-基）氨基]苯基}-2,2'-联噻吩-5-基）-9,10-双[（三异丙基硅基）乙炔基]蒽（TIPSAntBT-bisDMFA），通过π-共轭联噻吩桥连接，被合成出来并在溶液处理小分子有机太阳能电池（SMOSCs）中研究了它们的光伏特性。这些新材料表现出了从三苯胺到蒽的优异的分子内电荷转移，导致了更富电子的蒽核心，从而促进了电子向苯基-C（61）-丁酸甲酯的转移。与 TIPSAntBT 和三苯胺相比，这些材料在溶液处理的 SMOSCs 中表现出了三倍的空穴传输性能的提高和更好的光伏性能，最佳功率转换效率在 0.85 V 的高开路电压下达到了 2.96%。
