Improved‐Performance Dye‐Sensitized Solar Cells Using Nb‐Doped TiO2 Electrodes: Efficient Electron Injection and Transfer |
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| Authors: | Xujie Lü Xinliang Mou Jianjun Wu Dingwen Zhang Linlin Zhang Fuqiang Huang Fangfang Xu Sumei Huang |
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| Affiliation: | 1. CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China);2. Engineering Research Center for Nanophotonics and Advanced Instrument East China Normal University Shanghai 200062 (P.R. China);3. Inorganic Materials Analysis and Testing Center Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China) |
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| Abstract: | 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 (Vfb) 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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| Keywords: | Solar Cells Titanium dioxide Doping Charge transport |
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