Journal of South China University of Technology (Natural Science Edition) ›› 2005, Vol. 33 ›› Issue (2): 6-9,18.

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Performances of Photovoitaic Cells Based on Se-Containing Low-Bandgap Polymer

Tian Ren-yu  Yang Ren-qiang  Zhou Qing-mei  Peng Jun-biao  Cao Yong   

  1. Institute of Polymer Optodectronic Materials and Devices,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2004-05-12 Online:2005-02-25 Published:2005-02-25
  • Contact: 彭俊彪，E—mail：psjbpeng@scut．edu．cn E-mail:rytian@scut.edu.cn
  • About author:田仁玉(1971-)，女，讲师，博士生，主要从事高分子光电器件方面的研究．
  • Supported by:

    国家“973”基金资助项目(2002CB613405)；广东省自然科学基金资助项目(990623)

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Abstract:

Se-containing low-bandgap polymer-poly[2,7-(9,9-dioctyl)fluorene-co-5,5’-(4,7-diselenophenyl)-2,2’-v1-2,1,3-benzoselenodiazole](PFSeBSe)was used as the electron donor in order to expand the spectral re-sponse region of polymer photovohaic cells(PPVCs).Single-layer PPVC was made by blending PFSeBSe with C60 derivative(PCBM),the electron acceptor.The results indicate that the optimal blend ratio of PFSeBSe to PCBM is about 1:4 (in mass),and that a maximum power conversion efficiency of 0.423%under Air Mass 1.5 solar simu-lat0r(100 mW•cm-2 ),can be obtained when LiF/Al is used as the cathode.Th e photosensitivity of the cell ex-pands to more than 700 nm．which is 30 ~50 nm red-shifted compared with the results in the literature,suggesting a better match of the absorption of the blend system to the terrestrial solar spectrum.

Key words: photovohaic cells, Se-containing low-bandgap polymer, photosensitivity