Constructing 3D Branched Nanowire Coated Macroporous Metal Oxide Electrodes with Homogeneous or Heterogeneous Compositions for Efficient Solar Cells

Authors

  • Wu-Qiang Wu,

    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275 (P.R. China)
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  • Yang-Fan Xu,

    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275 (P.R. China)
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  • Hua-Shang Rao,

    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275 (P.R. China)
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  • Hao-Lin Feng,

    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275 (P.R. China)
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  • Prof. Dr. Cheng-Yong Su,

    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275 (P.R. China)
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  • Prof. Dr. Dai-Bin Kuang

    Corresponding author
    1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275 (P.R. China)
    • MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275 (P.R. China)===

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  • We acknowledge financial support from the National Natural Science Foundation of China (U0934003, J1103305), the Program for New Century Excellent Talents in University (NCET-11-0533), the Fundamental Research Funds for the Central Universities, and the NSF of Guangdong Province (S2013030013474).

Abstract

Light-harvesting and charge collection have attracted increasing attention in the domain of photovoltaic cells, and can be facilitated dramatically by appropriate design of a photonic nanostructure. However, the applicability of current light-harvesting photoanode materials with single component and/or morphology (such as, particles, spheres, wires, sheets) is still limited by drawbacks such as insufficient electron–hole separation and/or light-trapping. Herein, we introduce a universal method to prepare hierarchical assembly of macroporous material–nanowire coated homogenous or heterogeneous metal oxide composite electrodes (TiO2–TiO2, SnO2–TiO2, and Zn2SnO4–TiO2; homogenous refers to a material in which the nanowire and the macroporous material have the same composition, i.e. both are TiO2. Heterogeneous refers to a material in which the nanowires and the macroporous material have different compositions). The dye-sensitized solar cell based on a TiO2-macroporous material–TiO2-nanowire homogenous composition electrode shows an impressive conversion efficiency of 9.51 %, which is much higher than that of pure macroporous material-based photoelectrodes to date.

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