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ZnO Nanowire Arrays for Enhanced Photocurrent in PbS Quantum Dot Solar Cells

Authors

  • Joel Jean,

    1. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 13-3138; Cambridge, MA 02139, USA
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  • Sehoon Chang,

    1. Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 13-5094, Cambridge, MA 02139, USA
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  • Patrick R. Brown,

    1. Department of Physics, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 13-3074, Cambridge, MA 02139, USA
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  • Jayce J. Cheng,

    1. Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 13-5094, Cambridge, MA 02139, USA
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  • Paul H. Rekemeyer,

    1. Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 13-5094, Cambridge, MA 02139, USA
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  • Moungi G. Bawendi,

    1. Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 6-221, Cambridge, MA 02139, USA
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  • Silvija Gradečak,

    1. Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 13-5094, Cambridge, MA 02139, USA
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  • Vladimir Bulović

    Corresponding author
    1. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 13-3138; Cambridge, MA 02139, USA
    • Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 13-3138; Cambridge, MA 02139, USA.
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Abstract

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Vertical arrays of ZnO nanowires can decouple light absorption from carrier collection in PbS quantum dot solar cells and increase power conversion efficiencies by 35%. The resulting ordered bulk heterojunction devices achieve short-circuit current densities in excess of 20 mA cm−2 and efficiencies of up to 4.9%.

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