Synthesis and photovoltaic properties of copolymers based on benzo[1,2-<i>b</i>
:4,5-<i>b</i>
′]dithiophene and thiophene with electron-withdrawing side chains
作者:Yujuan Nie、Bin Zhao、Peng Tang、Peng Jiang、Zongfang Tian、Ping Shen、Songting Tan
DOI:10.1002/pola.24799
日期:2011.8.15
Six alternating conjugated copolymers (PL1–PL6) of benzo[1,2‐b:4,5‐b′]dithiophene (BDT) and thiophene, containing electron‐withdrawing oxadiazole (OXD), ester, or alkyl as side chains, were synthesized by Stille coupling reaction. The structures of the polymers were confirmed, and their thermal, optical, electrochemical, and photovoltaic properties were investigated. The introduction of conjugated
六种苯并[1,2- b:4,5- b ']二噻吩(BDT)和噻吩的交替共轭共聚物(PL1 - PL6)含有吸电子恶二唑(OXD),酯或烷基作为侧链。通过Stille偶联反应合成。确认了聚合物的结构,并研究了它们的热,光学,电化学和光伏性能。由于BDT的低位阻,引入共轭吸电子OXD或甲酸酯侧链有利于降低聚合物的带隙并改善光伏性能。基于合成的聚合物和富勒烯衍生物[6,6]-苯基-C的共混物制造了块状异质结聚合物太阳能电池(PSC)重量比为1:2的61丁酸甲酯(PC 61 BM)。对于基于PL5的PSC,在AM 1.5、100 mW / cm 2的照明下,最大功率转换效率为2.06%。©2011 Wiley Periodicals,Inc. J Polym Sci A部分:Polym Chem,2011年