Current Photovoltaic Research

Korea Photovoltaic Society (한국태양광발전학회)
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Improved Conversion Efficiency of Dye-sensitized Solar Cells Based on TiO2 Porous Layer Coated TiO2 Nanotubes on a Titanium Mesh Substrate as Photoanode

  • Lim, Jae-Min (Department of Nano Materials and Engineering and BK21 Plus Nano Convergence Technology Division, Pusan National University) ;
  • He, Weizhen (Department of Nano Materials and Engineering and BK21 Plus Nano Convergence Technology Division, Pusan National University) ;
  • Kim, Hyung-Kook (Department of Nano Materials and Engineering and BK21 Plus Nano Convergence Technology Division, Pusan National University) ;
  • Hwang, Yoon-Hwae (Department of Nano Materials and Engineering and BK21 Plus Nano Convergence Technology Division, Pusan National University)
  • Received : 2013.11.22
  • Accepted : 2013.12.11
  • Published : 2013.12.31
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Abstract

We report here flexible dye-sensitized solar cells (DSSC) based on Ti-mesh electrodes that show good mechanical flexibility and electrical conductivity. $TiO_2$ nanotube arrays prepared by electrochemical anodizing Ti-mesh substrate were used as photoanode. A Pt-coated Ti-mesh substrate was used as counter electrode. The photoanodes were modified by coating a $TiO_2$ porous layer onto the $TiO_2$ nanotubes in order to increase the specific surface area. To increase the long term stability of the DSSCs, a gel type electrolyte was used instead of a conventional liquid type electrolyte. The DSSC based on $33.2{\mu}m$ long porous $TiO_2$ nanotubes exhibited a better energy conversion efficiency of ~2.33%, which was higher than that of the DSSCs based on non-porous $TiO_2$ nanotubes.

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