Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Suppression of Charge Recombination Rate in Nanocrystalline SnO2 by Thin Coatings of Divalent Oxides in Dye-Sensitized Solar Cells

  • Lee, Chae-Hyeon (Solar Cell Center, Korea Institute of Science and Technology) ;
  • Lee, Gi-Won (Solar Cell Center, Korea Institute of Science and Technology) ;
  • Kang, Wee-Kyung (Department of Chemistry, Soongsil University) ;
  • Lee, Doh-Kwon (Solar Cell Center, Korea Institute of Science and Technology) ;
  • Ko, Min-Jae (Solar Cell Center, Korea Institute of Science and Technology) ;
  • Kim, Kyoung-Kon (Solar Cell Center, Korea Institute of Science and Technology) ;
  • Park, Nam-Gyu (School of Chemical Engineering, Sungkyunkwan University)
  • Received : 2010.04.26
  • Accepted : 2010.05.26
  • Published : 2010.11.20
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Abstract

The core-shell $SnO_2$@AO (A=Ni, Cu, Zn and Mg) films were prepared and the effects of coatings on photovoltaic properties were investigated. Studies on X-ray photoelectron spectroscopy, energy dispersive X-ray analysis and transmission electron microscopy showed the formation of divalent oxides on the surface of $SnO_2$ nanoparticles. It was commonly observed that all the dye-sensitized core-shell films exhibited higher photovoltage than the bare $SnO_2$ film. Transient photovoltage measurements confirmed that the improved photovoltages were related to the decreased time constants for electron recombination.

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References

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