Engineering Impurity Distributions in Photoelectrodes for Solar Water Oxidation

Authors

  • Coleman X. Kronawitter,

    Corresponding author
    1. Department of Mechanical Engineering, University of California, Berkeley, Mail Code 1740, 6141 Etcheverry Hall, University of California, Berkeley, CA 94720-1740, USA
    2. Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 70-108B, USA Berkeley, CA 94720, USA
    • Department of Mechanical Engineering, University of California, Berkeley, Mail Code 1740, 6141 Etcheverry Hall, University of California, Berkeley, CA 94720-1740, USA.
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  • Zhixun Ma,

    1. Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 70-108B, USA Berkeley, CA 94720, USA
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  • Dongfang Liu,

    1. Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 70-108B, USA Berkeley, CA 94720, USA
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  • Samuel S. Mao,

    Corresponding author
    1. Department of Mechanical Engineering, University of California, Berkeley, Mail Code 1740, 6141 Etcheverry Hall, University of California, Berkeley, CA 94720-1740, USA
    2. Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 70-108B, USA Berkeley, CA 94720, USA
    • Department of Mechanical Engineering, University of California, Berkeley, Mail Code 1740, 6141 Etcheverry Hall, University of California, Berkeley, CA 94720-1740, USA.
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  • Bonnie R. Antoun

    1. Sandia National Laboratories, P.O. Box 969, MS 9042, Livermore, CA 94551-0969, USA
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Abstract

original image

A strategy is introduced to decouple the optical absorption and electronic transport processes required for operation of oxide photoelectrodes in photoelectrochemical cells. Results indicate optical absorption at visible wavelengths and the related water photo-oxidation efficiencies can be enhanced by spatially segregating the functional impurity concentrations that facilitate their associated physical processes.

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