Improved‐Performance Dye‐Sensitized Solar Cells Using Nb‐Doped TiO 2  Electrodes: Efficient Electron Injection and Transfer | Zendy

Lü Xujie | Zendy; Mou Xinliang | Zendy; Wu Jianjun | Zendy; Zhang Dingwen | Zendy; Zhang Linlin | Zendy; Huang Fuqiang | Zendy; Xu Fangfang | Zendy; Huang Sumei | Zendy

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Improved‐Performance Dye‐Sensitized Solar Cells Using Nb‐Doped TiO 2 Electrodes: Efficient Electron Injection and Transfer

Author(s) -

Lü Xujie,

Mou Xinliang,

Wu Jianjun,

Zhang Dingwen,

Zhang Linlin,

Huang Fuqiang,

Xu Fangfang,

Huang Sumei

Publication year - 2010

Publication title -

advanced functional materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 6.069

H-Index - 322

eISSN - 1616-3028

pISSN - 1616-301X

DOI - 10.1002/adfm.200901292

Subject(s) - materials science , dye sensitized solar cell , anatase , doping , scanning electron microscope , solar cell , chemical engineering , energy conversion efficiency , transmission electron microscopy , nanotechnology , scanning transmission electron microscopy , electrode , conductivity , nanoparticle , electron transfer , titanium dioxide , optoelectronics , photocatalysis , composite material , catalysis , photochemistry , chemistry , organic chemistry , electrolyte , engineering

Well‐crystallized Nb‐doped anatase TiO 2 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 TiO 2 lattice is confirmed by scanning transmission electron microscopy (STEM) elemental mapping and line‐scanning analyses. After Nb doping, the conductivity of the TiO 2 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 TiO 2 is significantly better, by about 18.2%, compared to that of a cell based on undoped TiO 2 . The as‐prepared Nb‐doped TiO 2 material is proven in detail to be a better photoanode material than pure TiO 2 , 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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