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    Chlorine-Doped Perovskite Oxide: A Platinum-Free Cathode for Dye-Sensitized Solar Cells

    Access Status
    Fulltext not available
    Authors
    Wang, Wei
    Tran, R.
    Qu, J.
    Liu, Yu
    Chen, C.
    Xu, M.
    Chen, Y.
    Ong, S.P.
    Wang, L.
    Zhou, W.
    Shao, Zongping
    Date
    2019
    Type
    Journal Article
    
    Metadata
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    Citation
    Wang, W. and Tran, R. and Qu, J. and Liu, Y. and Chen, C. and Xu, M. and Chen, Y. et al. 2019. Chlorine-Doped Perovskite Oxide: A Platinum-Free Cathode for Dye-Sensitized Solar Cells. ACS Applied Materials and Interfaces. 11 (39): pp. 35641-35652.
    Source Title
    ACS Applied Materials and Interfaces
    DOI
    10.1021/acsami.9b07966
    ISSN
    1944-8244
    Faculty
    Faculty of Science and Engineering
    School
    WASM: Minerals, Energy and Chemical Engineering
    School of Elec Eng, Comp and Math Sci (EECMS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP150104365
    http://purl.org/au-research/grants/arc/DP160104835
    URI
    http://hdl.handle.net/20.500.11937/91954
    Collection
    • Curtin Research Publications
    Abstract

    Triiodide/iodide (I3-/I-) redox couple-mediated solar cells, batteries, and electrochromic devices require highly efficient and stable electrocatalysts for I3- reduction reaction (IRR) to overcome performance limitations, whereas the widely used platinum (Pt) cathode for IRR has limitations of high price and unfavorable durability. In this work, we present a halogen element (chlorine) doping strategy to design low-cost perovskite-type electrocatalysts with enhanced IRR activity and stability. The dye-sensitized solar cell (DSSC) assembled by the LaFeO2.965-ÎCl0.035 cathode delivers an attractive power conversion efficiency (PCE) of 11.4% with a remarkable PCE enhancement factor of 23% compared with Pt, which is higher than most of the reported non-Pt DSSC cathodes. Attractively, LaFeO2.965-ÎCl0.035 displays superior IRR activity/stability and structural stability in the I3-/I--based electrolyte compared to pristine LaFeO3 because chlorine doping facilitates the creation of oxygen vacancies (active sites) and enhances surface acidity simultaneously. This study provides a new way for designing outstanding IRR electrocatalysts, which could be applied to many redox couple-mediated photo/electrochemical devices.

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