Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Effect of Titanium Nanorods in the Photoelectrode on the Efficiency of Dye Sensitized Solar Cells

  • Rahman, Md. Mahbubur (Department of Advanced Technology Fusion, Konkuk University) ;
  • Kim, Hyun-Yong (ENBKOREA Co. LTD.) ;
  • Jeon, Young-Deok (Nanotechnology Research Center & Department of Applied Chemistry, Konkuk University) ;
  • Jung, In-Soo (Nanotechnology Research Center & Department of Applied Chemistry, Konkuk University) ;
  • Noh, Kwang-Mo (Nanotechnology Research Center & Department of Nano Science and Mechatronics Engineering, Konkuk University) ;
  • Lee, Jae-Joon (Department of Advanced Technology Fusion, Konkuk University)
  • Received : 2013.04.23
  • Accepted : 2013.06.26
  • Published : 2013.09.20
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Abstract

The effect of $TiO_2$ nanorods (TNR) and nanoparticles (TNP) composite photoelectrodes and the role of TNR to enhance the energy conversion efficiency in dye-sensitized solar cells (DSSCs) was investigated. The 5% TNR content into the TNP photoelectrode significantly increased the short-circuit current density ($J_{sc}$) and the open-circuit potential ($V_{oc}$) with the overall energy conversion efficiency enhancement of 13.6% compared to the pure TNP photoelectrode. From the photochemical and impedemetric analysis, the increased $J_{sc}$ and $V_{oc}$ for the 5% TNR/TNP composite photoelectrode was attributed to the scattering effect of TNR, reduced electron diffusion path and the suppression of charge recombination between the composite photoelectrode and electrolyte or dye.

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