Rationally Designed, Three-Dimensional Carbon Nanotube Back-Contacts for Efficient Solar Devices

Authors

  • Cary L. Pint,

    1. Department of Electrical Engineering and Computer Science, University of California, Berkeley, CA 94720 USA, Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
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  • Kuniharu Takei,

    1. Department of Electrical Engineering and Computer Science, University of California, Berkeley, CA 94720 USA, Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
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  • Rehan Kapadia,

    1. Department of Electrical Engineering and Computer Science, University of California, Berkeley, CA 94720 USA, Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
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  • Maxwell Zheng,

    1. Department of Electrical Engineering and Computer Science, University of California, Berkeley, CA 94720 USA, Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
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  • Alexandra C. Ford,

    1. Department of Electrical Engineering and Computer Science, University of California, Berkeley, CA 94720 USA, Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
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  • Junjun Zhang,

    1. Department of Electrical Engineering and Computer Science, University of California, Berkeley, CA 94720 USA, Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
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  • Arash Jamshidi,

    1. Department of Electrical Engineering and Computer Science, University of California, Berkeley, CA 94720 USA
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  • Rizia Bardhan,

    1. The Molecular Foundry Material Sciences, Division Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
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  • Jeffrey J. Urban,

    1. The Molecular Foundry Material Sciences, Division Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
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  • Ming Wu,

    1. Department of Electrical Engineering and Computer Science, University of California, Berkeley, CA 94720 USA
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  • Joel W. Ager,

    1. Material Sciences Division Lawrence, Berkeley National Laboratory, Berkeley, CA 94720 USA
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  • Michael M. Oye,

    1. NASA Ames Research Center, Moffett Field, CA 94035, USA
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  • Ali Javey

    Corresponding author
    1. Department of Electrical Engineering and Computer Science, University of California, Berkeley, CA 94720 USA, Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
    • Department of Electrical Engineering and Computer Science, University of California, Berkeley, CA 94720 USA, Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA.
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Abstract

original image

Structure matters in solar-to-fuel conversion efficiency, demonstrated for TiO2 coated onto designed three-dimensional (3-D) carbon nanofiber scaffolds. Performance enhancement of up to three times compared to flat films can be mostly attributed to structurally-enhanced carrier collection and photon management processes. Using 3-D templates to balance light absorption depth and carrier collection can lead to a new class of high efficiency and cheap energy conversion devices.

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