Improved performance of silicon-nanoparticle film-coated dye-sensitized solar cells

Authors

  • Ravindra Kumar Gupta,

    1. CRC, Department of Optometry, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia
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  • Idriss M. Bedja,

    Corresponding author
    1. CRC, Department of Optometry, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia
    • Phone: +966 1 469 3534, Fax: +966 1 469 3536
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  • Abdullah Saleh Aldwayyan

    1. Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
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Abstract

Silicon (Si) nanoparticles with average size of 13 nm and orange–red luminescence under UV absorption were synthesized using electrochemical etching of silicon wafers. A film of Si nanoparticles with thickness of 0.75 µm to 2.6 µm was coated on the glass (TiO2 side) of a dye-sensitized solar cell (DSSC). The cell exhibited nearly 9% enhancement in power conversion efficiency (η) at film thickness of ∼2.4 µm under solar irradiation of 100 mW/cm2 (AM 1.5) with improved fill factor and short-circuit current density. This study revealed for the first time that the Si-nanoparticle film converting UV into visible light and helping in homogeneous irradiation, can be utilized for improving the efficiency of the DSSCs. (© 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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