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  • A fluorescent quenching performance enhancing principle for carbon nanodot-sensitized aqueous solar cells

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    Accepted Manuscript (AM)
    Author(s)
    Zhang, Haimin
    Wang, Yun
    Liu, Porun
    Li, Yibing
    Yang, Hua Gui
    An, Taicheng
    Wong, Po-Keung
    Wang, Dan
    Tang, Zhiyong
    Zhao, Huijun
    Griffith University Author(s)
    Zhao, Huijun
    Liu, Porun
    Wang, Yun
    Year published
    2015
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    Abstract
    We report a fluorescent quenching principle capable of markedly enhancing the conversion efficiency of carbon nanodots (CNDs)-sensitized aqueous solar cells (CNDs-ASCs). A conversion efficiency of 0.529%, over 4-times of the best conversion efficiency reported for CNDs-sensitized solar cells, is achieved with a cell constructed using CNDs as the sensitizer and aqueous I−/I3− electrolyte serving a dual-function as the recombination blocker (fluorescent quencher) and redox mediator. The results confirm that the significantly enhanced utilization efficiency of the photo-excited electrons resulting from the efficiently quenched ...
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    We report a fluorescent quenching principle capable of markedly enhancing the conversion efficiency of carbon nanodots (CNDs)-sensitized aqueous solar cells (CNDs-ASCs). A conversion efficiency of 0.529%, over 4-times of the best conversion efficiency reported for CNDs-sensitized solar cells, is achieved with a cell constructed using CNDs as the sensitizer and aqueous I−/I3− electrolyte serving a dual-function as the recombination blocker (fluorescent quencher) and redox mediator. The results confirm that the significantly enhanced utilization efficiency of the photo-excited electrons resulting from the efficiently quenched fluorescent emission of CNDs sensitizer by I− is responsible for the markedly improved conversion efficiency of CNDs-ASCs. The findings of this work validate a principle that could be widely applicable for enhancing the performance of solar cells employing other fluorescent quantum dots/nanodots sensitizers.
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    Journal Title
    Nano Energy
    Volume
    13
    DOI
    https://doi.org/10.1016/j.nanoen.2015.01.046
    Copyright Statement
    © 2015 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Macromolecular and materials chemistry
    Macromolecular and materials chemistry not elsewhere classified
    Materials engineering
    Nanotechnology
    Publication URI
    http://hdl.handle.net/10072/101228
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    • Journal articles

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