Journal of Electrochemical Science and Technology

The Korean Electrochemical Society (한국전기화학회)
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Origin of Nonlinear Device Performance with Illuminated Sun Intensity in Mesoscopic Sb2S3-sensitized Photoelectrochemical Solar Cells using Cobalt Electrolyte

  • Im, Sang-Hyuk (KRICT-EPFL Global Research Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Lee, Yong-Hui (KRICT-EPFL Global Research Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Hi-Jung (KRICT-EPFL Global Research Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Lim, Choong-Sun (KRICT-EPFL Global Research Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kang, Yong-Ku (KRICT-EPFL Global Research Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Seok, Sang-Il (KRICT-EPFL Global Research Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology)
  • Received : 2011.09.15
  • Accepted : 2011.09.29
  • Published : 2011.09.30
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Abstract

The mesoscopic $Sb_2S_3$-sensitized photoelectrochemical solar cells using cobalt redox electrolyte exhibit nonlinear behavior of power conversion efficiency with illuminated sun intensity. From the measurement of bulk diffusion and electrochemical impedance spectroscopy studies, we suggest that the nonlinearity of device performance with illuminated sun intensity is attributed not to the slow bulk diffusion problem of cobalt electrolyte but to the limited mass transport in narrowed pore volume in mesoscopic $TiO_2$ electrode.

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References

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