Functionalizing benzothiadiazole with non-conjugating ester groups as side chains in a donor–acceptor polymer improves solar cell performance
作者:Radhakrishna Ratha、Mohammad Adil Afroz、Ritesh Kant Gupta、Parameswar Krishnan Iyer
DOI:10.1039/c8nj05850d
日期:——
Herein, the effect of non-conjugated ester functionalization at the 5,6-position of 2,1,3-benzothiadiazole (BT) in a donor (D)–acceptor (A) conjugated polymer (CP) used for photovoltaic devices has been investigated. Positions 5 and 6 of BT were functionalized with methyl acetate groups and the structure property relationship was compared to BT with methyl groups at the 5 and 6 positions in four types
在本文中,在用于光伏器件的供体(D)-受体(A)共轭聚合物(CP)中,在2,1,3-苯并噻二唑(BT)的2,1,3-苯并噻二唑(BT)的5,6-位上存在非共轭酯官能化的影响调查。在四种类型的D-A CP中,将BT的5和6位用乙酸甲酯官能化,并将结构特性关系与BT和5和6位具有甲基的官能团进行比较。使用Stille偶联反应合成了BT和Th-BT-Th的新合成的甲基丙烯酸甲酯和乙酸甲酯与常用的供体,例如二噻吩(DTh)和苯并二噻吩(BDT)的交替共聚物:P(1,2, 3,4)-Me和P(1,2,3,4)-Ac。使用GPC,UV可见,1 H-NMR,13对所有CP进行了广泛表征C-NMR,TGA和CV。通过使用B3LYP / 6-31G(d,p)的密度泛函理论(DFT)分析了优化的几何形状,以及被乙酸酯基取代后的二面角的变化。侧链酯基团降低了二面角,改善了聚合物太阳能电池(PSC)中CP的光学和