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Compositionally Tunable Photoluminescence Emission in Cu2ZnSn(S1−xSex)4 Nanocrystals

Authors

  • Dr. Ajay Singh,

    1. Department of Chemical and Environmental Sciences Materials and Surface Science Institute (MSSI), University of Limerick (Ireland)
    2. The SFI-Strategic Research Cluster in Solar Energy Research, University of Limerick (Ireland)
    3. Current address: The Molecular Foundry, Lawrence Berkeley National Laboratory (USA)
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  • Shalini Singh,

    1. Department of Chemical and Environmental Sciences Materials and Surface Science Institute (MSSI), University of Limerick (Ireland)
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  • Dr. Sergiu Levcenko,

    1. Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, Berlin (Germany)
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  • Dr. Thomas Unold,

    1. Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, Berlin (Germany)
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  • Dr. Fathima Laffir,

    1. Department of Chemical and Environmental Sciences Materials and Surface Science Institute (MSSI), University of Limerick (Ireland)
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  • Dr. Kevin M. Ryan

    Corresponding author
    1. Department of Chemical and Environmental Sciences Materials and Surface Science Institute (MSSI), University of Limerick (Ireland)
    2. The SFI-Strategic Research Cluster in Solar Energy Research, University of Limerick (Ireland)
    • Department of Chemical and Environmental Sciences Materials and Surface Science Institute (MSSI), University of Limerick (Ireland)

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  • This work was supported by the Science Foundation Ireland (SFI) through the Principal Investigator program. Contract number 11-PI-48 and the Solar Energy Conversion Strategic Research Cluster (grant number 07/SRC/B1160). A.S. thanks the SFI STTF and HZB for the support. S.L. thanks the Humboldt foundation for support.

Abstract

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Inorganic nanostructures: Alloyed Cu2ZnSn(S1−xSex)4 wurtzite nanocrystals (10 nm in size) with a varying composition (x=0–1) were synthesized using a colloidal hot injection route. A photoluminescence (PL) emission study of these nanocrystals shows a compositionally tunable band-gap ranging between 0.9–1.4 eV that directly correlates to the sulfur-to-selenium ratio (see picture).

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