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Mapping Spatial Heterogeneity in Cu(In1−xGax)Se2 Nanocrystal-Based Photovoltaics with Scanning Photocurrent and Fluorescence Microscopy

Authors

  • David P. Ostrowski,

    1. Department of Chemistry and Biochemistry, Center for Nano and Molecular Science and Technology, 1 University Station, A5300, The University of Texas at Austin, Austin, TX 78712, USA
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  • Micah S. Glaz,

    1. Department of Chemistry and Biochemistry, Center for Nano and Molecular Science and Technology, 1 University Station, A5300, The University of Texas at Austin, Austin, TX 78712, USA
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  • Brian W. Goodfellow,

    1. Department of Chemical Engineering, Texas Materials Institute, and Center for Nano and Molecular Science and Technology, 1 University Station, C0400, The University of Texas at Austin, Austin, TX 78712, USA
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  • Vahid A. Akhavan,

    1. Department of Chemical Engineering, Texas Materials Institute, and Center for Nano and Molecular Science and Technology, 1 University Station, C0400, The University of Texas at Austin, Austin, TX 78712, USA
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  • Matthew G. Panthani,

    1. Department of Chemical Engineering, Texas Materials Institute, and Center for Nano and Molecular Science and Technology, 1 University Station, C0400, The University of Texas at Austin, Austin, TX 78712, USA
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  • Brian A. Korgel,

    Corresponding author
    1. Department of Chemical Engineering, Texas Materials Institute, and Center for Nano and Molecular Science and Technology, 1 University Station, C0400, The University of Texas at Austin, Austin, TX 78712, USA
    • Department of Chemical Engineering, Texas Materials Institute, and Center for Nano and Molecular Science and Technology, 1 University Station, C0400, The University of Texas at Austin, Austin, TX 78712, USA.
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  • David A. Vanden Bout

    Corresponding author
    1. Department of Chemistry and Biochemistry, Center for Nano and Molecular Science and Technology, 1 University Station, A5300, The University of Texas at Austin, Austin, TX 78712, USA
    • Department of Chemistry and Biochemistry, Center for Nano and Molecular Science and Technology, 1 University Station, A5300, The University of Texas at Austin, Austin, TX 78712, USA
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Abstract

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Scanning photocurrent and fluorescence microscopy, along with local voltage-dependent photocurrent measurements, are used to study spatial variations in electronic and optical properties across an as-fabricated, functional Cu(In1-xGax)Se2 (CIGS) nanocrystal-based photovoltaic device. Through correlation of local morphological features with spatial variations in device properties, a greater understanding of photovoltaic performance is obtained.

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