Side-chain engineering of high-efficiency conjugated polymer photovoltaic materials
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  • 作者：Zhi-Guo Zhang (1)
    Yongfang Li (1) (2)

    1. Beijing National Laboratory for Molecular Sciences     ; CAS Key Laboratory of Organic Solids ; Institute of Chemistry ; Chinese Academy of Sciences ; Beijing ; 100190 ; China
    2. Laboratory of Advanced Optoelectronic Materials     ; College of Chemistry ; Chemical Engineering and Materials Science ; Soochow University ; Suzhou ; 215123 ; China
  • 关键词：polymer solar cells ; conjugated polymers ; side ; chain engineering ; photovoltaic materials ; 2D ; conjugated polymers
  • 刊名：SCIENCE CHINA Chemistry
  • 出版年：2015
  • 出版时间：February 2015
  • 年：2015
  • 卷：58
  • 期：2
  • 页码：192-209
  • 全文大小：1,784 KB
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  • 刊物类别：Chemistry and Materials Science
  • 刊物主题：Chemistry
    Chinese Library of Science
    Chemistry
  • 出版者：Science China Press, co-published with Springer
  • ISSN：1869-1870
文摘
In recent years, conjugated polymers have attracted great attention in the application as photovoltaic donor materials in polymer solar cells (PSCs). Broad absorption, lower-energy bandgap, higher hole mobility, relatively lower HOMO energy levels, and higher solubility are important for the conjugated polymer donor materials to achieve high photovoltaic performance. Side-chain engineering plays a very important role in optimizing the physicochemical properties of the conjugated polymers. In this article, we review recent progress on the side-chain engineering of conjugated polymer donor materials, including the optimization of flexible side-chains for balancing solubility and intermolecular packing (aggregation), electron-withdrawing substituents for lowering HOMO energy levels, and two-dimension (2D)-conjugated polymers with conjugated side-chains for broadening absorption and enhancing hole mobility. After the molecular structural optimization by side-chain engineering, the 2D-conjugated polymers based on benzodithiophene units demonstrated the best photovoltaic performance, with power-conversion efficiency higher than 9%.

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