采用Suzuki偶合反应合成了含有推拉电子基团的三苯胺-芴-苯并噻二唑共聚物(TPA-PF8-BT),其中供电子基团为三苯胺单元(TPA),吸电子基团为苯并噻二唑单元(BT).通过核磁共振法、凝胶渗透色谱法、紫外-可见光光谱法和循环伏安法等对其进行了分析研究,并与芴-三苯胺共聚物(PF8-TPA)的性能进行了对比.结果显示,三苯胺-芴-苯并噻二唑共聚物的能带隙宽度Eg为2.39 eV,最低未占分子轨道(LUMO)能级为-3.01 eV,最高已占分子轨道(HOMO)能级为-5.40 eV,与PF8-TPA相比,其能带隙宽度及LUMO能级均有所降低.基于TPA-PF8-BT器件(器件结构为氧化铟锡导电玻璃(ITO)/Copolymer(70 nm)/Al(100 nm))的短路电流是基于PF8-TPA器件的短路电流的近3倍,光电性能得以改善.
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