Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Low Temperature Synthesis of Transparent, Vertically Aligned Anatase TiO2 Nanowire Arrays: Application to Dye Sensitized Solar Cells

  • In, Su-Il (Department of Chemistry and Department of Electrical Engineering, the Pennsylvania State University, State College) ;
  • Almtoft, Klaus P. (Danish Technological Institute, Tribology Centre) ;
  • Lee, Hyeon-Seok (Department of Chemistry and Department of Electrical Engineering, the Pennsylvania State University, State College) ;
  • Andersen, Inge H. (Danish Technological Institute, Tribology Centre) ;
  • Qin, Dongdong (Department of Chemistry and Department of Electrical Engineering, the Pennsylvania State University, State College) ;
  • Bao, Ningzhong (State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology) ;
  • Grimes, C.A. (Flux Photon Corporation)
  • Received : 2011.12.14
  • Accepted : 2012.03.19
  • Published : 2012.06.20
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Abstract

We present a low temperature (${\approx}70^{\circ}C$) method to prepare anatase, vertically aligned feather-like $TiO_2$ (VAFT) nanowire arrays $via$ reactive pulsed DC magnetron sputtering. The synthesis method is general, offering a promising strategy for preparing crystalline nanowire metal oxide films for applications including gas sensing, photocatalysis, and 3rd generation photovoltaics. As an example application, anatase nanowire films are grown on fluorine doped tin oxide coated glass substrates and used as the photoanode in dye sensitized solar cells (DSSCs). AM1.5G power conversion efficiencies for the solar cells made of 1 ${\mu}m$ thick VAFT have reached 0.42%, which compares favorably to solar cells made of the same thickness P25 $TiO_2$ (0.35%).

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