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Improved‐Performance Dye‐Sensitized Solar Cells Using Nb‐Doped TiO₂ Electrodes: Efficient Electron Injection and Transfer

CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)

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Xinliang Mou

CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)

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Jianjun Wu

CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)

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Dingwen Zhang

Engineering Research Center for Nanophotonics and Advanced Instrument East China Normal University Shanghai 200062 (P.R. China)

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Linlin Zhang

Inorganic Materials Analysis and Testing Center Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)

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Fuqiang Huang

Corresponding Author

E-mail address: huangfq@mail.sic.ac.cn

CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)

CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)Search for more papers by this author

Fangfang Xu

Inorganic Materials Analysis and Testing Center Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)

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Sumei Huang

Engineering Research Center for Nanophotonics and Advanced Instrument East China Normal University Shanghai 200062 (P.R. China)

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Xujie Lü

CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)

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Xinliang Mou

CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)

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Jianjun Wu

CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)

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Dingwen Zhang

Engineering Research Center for Nanophotonics and Advanced Instrument East China Normal University Shanghai 200062 (P.R. China)

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Linlin Zhang

Inorganic Materials Analysis and Testing Center Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)

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Fuqiang Huang

Corresponding Author

E-mail address: huangfq@mail.sic.ac.cn

CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)

CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)Search for more papers by this author

Fangfang Xu

Inorganic Materials Analysis and Testing Center Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 (P.R. China)

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Sumei Huang

Engineering Research Center for Nanophotonics and Advanced Instrument East China Normal University Shanghai 200062 (P.R. China)

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First published: 27 January 2010

https://doi.org/10.1002/adfm.200901292

Citations: 415

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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 (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.