Development of Polymer Blend Solar Cells Composed of Conjugated Donor and Acceptor Polymers

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  • Ito Shinzaburo
    Department of Polymer Chemistry, Graduate School of Engineering,Kyoto University
  • Hirata Toshiaki
    Department of Polymer Chemistry, Graduate School of Engineering,Kyoto University
  • Mori Daisuke
    Department of Polymer Chemistry, Graduate School of Engineering,Kyoto University
  • Benten Hiroaki
    Department of Polymer Chemistry, Graduate School of Engineering,Kyoto University
  • Lee Li-Teng
    Department of Materials Science and Engineering,Feng Chia University
  • Ohkita Hideo
    Department of Polymer Chemistry, Graduate School of Engineering,Kyoto University

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All-polymer solar cells are expected as one of next generation photovoltaics. This paper presents two kinds of polymer/polymer blend solar cells to exemplify the potential advantages compared with conventional organic solar cells. The large difference in the HOMO/LUMO levels of donor/acceptor polymers results in a high voltage, and the large absorptivity up to near-infrared wavelengths allows to increase the photocurrent density. These characteristics are brought by development of a variety of low bandgap polymers. For the further improvement of conversion efficiency, it is a crucial issue to control the phase-separation structure on a nanometer scale.

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