Enhancing the efficiency of MEH-PPV and PCBM based polymer solar cells via optimization of device configuration and processing conditions

Authors

  • En Chung Chang,

    1. Opto-Electronics and Systems Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan 310, Republic of China
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  • Ching-Ian Chao,

    1. Opto-Electronics and Systems Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan 310, Republic of China
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  • Rong-Ho Lee

    Corresponding author
    1. Department of Chemical Engineering, National Yunlin University of Science and Technology, Yunlin, Taiwan 640, Republic of China
    • Department of Chemical Engineering, National Yunlin University of Science and Technology, Yunlin, Taiwan 640, Republic of China
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Abstract

Polymer solar cells were fabricated based on an interpenetrated network of conjugated polymer poly(2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylenevinylene) (MEH-PPV) as electron donor and fullerene derivative (6,6)-phenyl-C61-butyric acid methyl ester (PCBM) as electron acceptor. The photovoltaic performances were strongly dependent on the surface treatment of anode, conductivity of hole-transporting material, the thickness of MEH-PPV:PCBM composite film, and the cathode configuration. Best photovoltaic performances were obtained for the solar cell constructed with O2 plasma-treated anode glass, high conductivity hole-transporting material PEDOT, photoactive film thickness of 180 nm, and calcium/silver cathode. Open circuit voltage of 0.79 V, short circuit current density of 4.79 mA/cm2, fill factor of 44.4%, and 2.07% power conversion efficiency were obtained for the solar cell under 80 mW/cm2 white light from a halogen lamp. The influences of device fabrication conditions and configuration on the photovoltaic performance of MEH-PPV:PCBM composite film-based polymer solar cells were discussed in detail. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 1919–1924, 2006

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