Lock-up function of fluorine enhances photovoltaic performance of polythiophene

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• 作者：Na Jiao ; Dan He ; Liu Qian ; Zhongli Lei ; Liming Ding
• 关键词：polythiophene ; fluorination ; planarity ; photovoltaic performance
• 刊名：Science China Chemistry
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：60
• 期：2
• 页码：251-256
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry/Food Science, general;
• 出版者：Science China Press
• ISSN：1869-1870
• 卷排序：60

文摘

Three model polythiophenes, PTCBT, PTCFBT and PFTCBT, have been synthesized to investigate the effect of fluorination on photovoltaic performance of polythiothenes. Compared with PTCBT, PFTCBT with F atom on TC unit shows a narrower optical bandgap (1.79 eV), higher crystallinity, and ideal morphology in the active layer, leading to a higher short-circuit current density (J_sc) of 11.84 mA/cm2 and a power conversion efficiency (PCE) of 5.93%. The lock-up function of fluorine enhances polythiophene backbone planarity and molecular packing.