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    Carbon-coated three-dimensional WS<inf>2</inf>film consisting of WO<inf>3</inf>@WS<inf>2</inf>core-shell blocks and layered WS<inf>2</inf>nanostructures as counter electrodes for efficient dye-sensitized solar cells

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    Authors
    Shen, Z.
    Wang, M.
    Liu, Lihong
    Sofianos, M.
    Yang, H.
    Wang, Shaobin
    Liu, Shaomin
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Shen, Z. and Wang, M. and Liu, L. and Sofianos, M. and Yang, H. and Wang, S. and Liu, S. 2018. Carbon-coated three-dimensional WS<inf>2</inf>film consisting of WO<inf>3</inf>@WS<inf>2</inf>core-shell blocks and layered WS<inf>2</inf>nanostructures as counter electrodes for efficient dye-sensitized solar cells. Electrochimica Acta. 266: pp. 130-138.
    Source Title
    Electrochimica Acta
    DOI
    10.1016/j.electacta.2018.02.009
    ISSN
    0013-4686
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/66340
    Collection
    • Curtin Research Publications
    Abstract

    © 2018 Elsevier Ltd The possibility of using solar energy for electricity generation has inspired intensive enthusiasm on the development of solar cell devices. This work reports the synthesis of a novel counter electrode (CE) composed of WO x @WS 2 @carbon core-shell film and compares its electrical and electrocatalytic performances with other two CEs of WO x /carbon film and conventional Pt in the dye-sensitized solar cells (DSSCs). The WO x @WS 2 @carbon CE was prepared by a sulfurization treatment of a mesoporous WO x /carbon film coated on fluorine-doped tin oxide (FTO) glass. The well-interconnected three-dimensional (3D) WS 2 structure with coated carbon film provides high electrocatalytic activity and fast reaction kinetics for the reduction of triiodide to iodide due to its sufficient active sites on 3D WS 2 framework containing surface edge-oriented nanosheets and the facile electron transfer and electrolyte diffusion via the continuously carbon layer. Photovoltaic performance tests indicate the DSSC device with the counter electrode of WO x @WS 2 @carbon core-shell achieved the power conversion efficiency (PCE) of 7.71% compared favourably with the values of 6.00% from WO x /carbon CE and 7.34% from conventional Pt CE. Such results vividly mirror that the developed WO x @WS 2 @carbon core-shell can replace the conventional Pt film, realizing Pt-free counter electrodes for DSSCs.

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