三苯胺-芴-苯并噻二唑共聚物的合成及光电性能  

Synthesis and Photoelectric Properties of Triphenylamine-Benzothiadiazole-Fluorene Based Copolymer

作　　者：陈彬彬[1] 米衡[1] 管阳阳[1] 李坚[1] 

机构地区：[1]江苏省太阳能电池材料与技术重点实验室,常州大学材料掰学与工程学院,江苏常州213100

出　　处：《高分子材料科学与工程》2013年第6期32-36,共5页Polymer Materials Science & Engineering

摘　　要：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。A triphenylamine-benzothiadiazole-fluorene based copolymer, TPA-PF8-BT, was synthesized. This copolymer possesses bipolar charge transporting functionalities, through the incorporation of electron rich triphenylamine group and electron deficient benzothiadiazole group into the polymer backbone. TPA-PF8-BT exhibits a broad absorption spectra and the low energy absorption onset （519 nm）, indicating a relatively low band gap （2.39 eV）. Highest occupied molecular orbital（HOMO） and lower unoccupied molecular orbital（LUMO） levels are -5.40 eV, -3.01 eV respectively. The photovoltaic properties of copolymer were investigated with the device configuration of indium tin oxide glass（ITO）/copolymer（70 nm）/Al（100 nm）. The photocurrent is nearly twice larger than that of TPA-PF, which shows their potential applications in polymer solar cells.

关 键 词：Suzuki偶合 三苯胺-芴-苯并噻二唑共聚物 聚合物太阳能电池 D-π-A型聚合物 

分 类 号：TQ316.342[化学工程—高聚物工业]