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Doubling the Power Output of Bifacial Thin-Film GaAs Solar Cells by Embedding Them in Luminescent Waveguides

Authors

  • Xing Sheng,

    1. Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
    Current affiliation:
    1. X.S. and L.S. contributed equally to this work.
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  • Ling Shen,

    1. SHU-SolarE R&D Lab, Department of Physics, Shanghai University, Shanghai 200444, P.R. China
    Current affiliation:
    1. X.S. and L.S. contributed equally to this work.
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  • Taehwan Kim,

    1. Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
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  • Lanfang Li,

    1. Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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  • Xinran Wang,

    1. Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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  • Ryan Dowdy,

    1. Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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  • Paul Froeter,

    1. Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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  • Kazuki Shigeta,

    1. Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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  • Xiuling Li,

    1. Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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  • Ralph G. Nuzzo,

    1. Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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  • Noel C. Giebink,

    Corresponding author
    1. Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
    • Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
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  • John A. Rogers

    Corresponding author
    1. Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
    • Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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Abstract

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Thin-film, microscale GaAs solar cells transfer printed into luminescent concentrating waveguides show significantly enhanced power output compared to cells evaluated in isolation. Experimental and numerical simulation results demonstrate that optimized configurations involve a free-standing waveguide and a diffuse backside reflector, as a way to maximize capture of both waveguided and scattered photons. Such unusual options in engineering design suggest promising additional avenues for the use of luminescent concentration in advanced photovoltaics.

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