Improved-Performance Dye-Sensitized solar cells using Nb-Doped TiO 2 electrodes: Efficient electron Injection and transfer

  • Lü X
  • Mou X
  • Wu J
 et al. 
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Well-crystallized Nb-doped anatase TiO2 nanoparticles are prepared
by a novel synthetic route and successfully used as the photoanode
of dye-sensitized solar cells (DSSCs). The homogenous distribution
of Nb in the TiO2 lattice is confirmed by scanning transmission electron
microscopy (STEM) elemental mapping and line-scanning analyses. After
Nb doping, the conductivity of the TiO2 powder increases, and its
flat-band potential (V-fb) has a positive shift. The energy-conversion
efficiency of a cell based on 5.0 mol% Nb-doped TiO2 is significantly
better, by about 18.2%, compared to that of a cell based on undoped
TiO2. The as-prepared Nb-doped TiO2 material is proven in detail
to be a better photoanode material than pure TiO2, and this new synthetic
approach using a water-soluble precursor provides a simple and versatile
way to prepare excellent photoanode materials.

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  • Xujie Lü

  • Xinliang Mou

  • Jianjun Wu

  • Dingwen Zhang

  • Linlin Zhang

  • Fuqiang Huang

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