Journal of Industrial and Engineering Chemistry

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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The photovoltaic efficiencies on dye sensitized solar cells assembled with nanoporous carbon/$TiO_2$ composites

  • Kim, Dong Young (Department of Chemistry, College of Science, Yeungnam University) ;
  • Kim, Jiyeon (Department of Chemistry, College of Science, Yeungnam University) ;
  • Kim, Jieun (Department of Chemistry, College of Science, Yeungnam University) ;
  • Kim, A-Young (Department of Chemistry, College of Science, Yeungnam University) ;
  • Lee, Gayoung (Department of Chemistry, College of Science, Yeungnam University) ;
  • Kang, Misook (Department of Chemistry, College of Science, Yeungnam University)
  • Published : 2012.01.25
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Abstract

This study examined the characterization of nanoporous structured carbon/$TiO_2$ composites and its application to dye-sensitized solar cells. TEM of nanoporous structured carbon revealed nanopore sizes of 2.0-3.0 nm with a regular hexagonal form. When nanoporous structured carbon was mixed to $TiO_2$ particles and then was applied to DSSC, the energy conversion efficiency was enhanced considerably compared with that using only nanometer sized pure $TiO_2$: the energy conversion efficiency of the DSSC prepared from nanoporous carbon/$TiO_2$ composites was approximately 3.38%, compared to 2.49% using pure $TiO_2$. We confirmed from FT-IR spectroscopy that the dye molecules were attached perfectly to the surface and more was absorbed on the nanoporous structured carbon/$TiO_2$ composite than on the pure $TiO_2$ particles. In impedance measurements, $R_3$ which means the Nernstian diffusion within the electrolytes was largely decreased in a cell assembled by nanoporous carbon/$TiO_2$ composites than that of $TiO_2$.

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