Fine-tuning of polymer photovoltaic properties by the length of alkyl side chains
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  • 作者：Rui-ping Qin ; Yu-rong Jiang ; Hao-xing Zhang…
  • 关键词：Polymer solar cells ; Alkyl side chains ; Morphology ; Charge mobility
  • 刊名：Chinese Journal of Polymer Science
  • 出版年：2015
  • 出版时间：March 2015
  • 年：2015
  • 卷：33
  • 期：3
  • 页码：490-498
  • 全文大小：1,297 KB
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  • 刊物类别：Chemistry and Materials Science
  • 刊物主题：Chemistry
    Condensed Matter Physics
    Industrial Chemistry and Chemical Engineering
    Polymer Sciences
    Characterization and Evaluation of Materials
  • 出版者：Chinese Chemical Society and Institute of Chemistry, CAS, co-published with Springer
  • ISSN：1439-6203
文摘
This paper reports the synthesis and characteristics of a series of alkyl-substituted planar polymers. The physical properties are carefully tuned to optimize their photovoltaic performance. Depending on the length of soluble alkyl side chains which modify the structural order and orientation substantially in polymer backbones, the device performance can be improved significantly. The tuning of HOMO energy levels optimized polymers-spectral coverage of absorption and their hole mobility, as well as miscibility with fullerene; all these efforts enhanced polymer solar cell performances. The short-circuit current, J sc for polymer solar cells was increased by adjusting polymer chain packing ability. It was found that films with well distributed polymer/fullerene interpenetrating network exhibit improved solar cell conversion efficiency. Enhanced efficiency up to 5.8% has been demonstrated. The results provide important insights about the roles of flexile chains in structure-property relationship for the design of new polymers to be used in high efficient solar cells.
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