Enhanced Performance of Supported HfO2 Counter Electrodes for Redox Couples Used in Dye-Sensitized Solar Cells

Authors

  • Prof. Dr. Sining Yun,

    Corresponding author
    1. School of Materials & Mineral Resources, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055 (PR China), Fax: (+86) 029-85535724
    • Sining Yun, School of Materials & Mineral Resources, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055 (PR China), Fax: (+86) 029-85535724

      Tingli Ma, State Key laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024 (PR China)

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  • Dr. Haihui Pu,

    1. Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI 53211 (USA)
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  • Prof. Junhong Chen,

    1. Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI 53211 (USA)
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  • Prof. Anders Hagfeldt,

    1. Department of Chemistry—Ångström Laboratory, Uppsala University, Box 523, SE-751 20, Uppsala (Sweden)
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  • Prof. Tingli Ma

    Corresponding author
    1. State Key laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024 (PR China)
    • Sining Yun, School of Materials & Mineral Resources, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055 (PR China), Fax: (+86) 029-85535724

      Tingli Ma, State Key laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024 (PR China)

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Abstract

Mesoporous-graphitic-carbon-supported HfO2 (HfO2-MGC) nanohybrids were synthesized by using a soft-template route. Characterization and a systematic investigation of the catalytic properties, stability, and catalytic mechanism were performed for HfO2-MGC counter electrodes (CEs) in dye-sensitized solar cells (DSSCs). The new HfO2-MGC as a CE in DSSCs showed a surprisingly high efficiency of 7.75 % for the triiodide/iodide redox couple and 3.69 % for the disulfide/thiolate redox couple, greater than the Pt electrode in the corresponding electrolyte system, which opens up a possibility for its practical application.

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