Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Enhancement of Photocurrent Efficiency in Dye-sensitized Solar Cells Using Nanometer-sized Y-incorporated TiO2 Materials

  • Kim, Su-Jung (Department of Chemistry, College of Science, Yeungnam University) ;
  • Yeo, Min-Kyeong (Department of Environmental Science and Environmental Research, College of Engineering, Kyung Hee University) ;
  • Um, Myeong-Heon (Department of Chemical Engineering, Kongju National University) ;
  • Kang, Mi-Sook (Department of Chemistry, College of Science, Yeungnam University)
  • Received : 2011.10.12
  • Accepted : 2012.01.04
  • Published : 2012.04.20
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Abstract

This study examines the photoelectric conversion efficiency of dye-sensitized solar cells (DSSCs) when nanometer-sized Y (0, 0.1, 0.5, and 1.0 mol %)-incorporated $TiO_2$ prepared using a solvothermal method is utilized as the working electrode material. The photoelectric properties of the Y-$TiO_2$ used in DSSCs were studied by frequency-resolved modulated photocurrent/photovoltage spectroscopy. The recombination was much slower in the Y-$TiO_2$-based DSSCs than in the pure $TiO_2$-assembled DSSC. Compared to that using pure $TiO_2$, the energy conversion efficiency was enhanced considerably by the application of Y-$TiO_2$ in the DSSCs to approximately 6.08% for 0.5 mol % Y-$TiO_2$.

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