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Issue 1, 2017
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Solar hydrogen production using epitaxial SrTiO3 on a GaAs photovoltaic

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Abstract

We demonstrate an oxide-stabilized III–V photoelectrode architecture for solar fuel production from water in neutral pH. For this tunable architecture we demonstrate 100% Faradaic efficiency for hydrogen evolution, and incident photon-to-current efficiencies (IPCE) exceeding 50%. High IPCE for hydrogen evolution is a consequence of the low-loss interface achieved via epitaxial growth of a thin oxide on a GaAs solar cell. Developing optimal energetic alignment across the interfaces of the photoelectrode using well-established III–V technology is key to obtaining high performance. This advance constitutes a critical milestone towards efficient, unassisted fuel production from solar energy.

Graphical abstract: Solar hydrogen production using epitaxial SrTiO3 on a GaAs photovoltaic

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Publication details

The article was received on 28 Oct 2016, accepted on 22 Dec 2016 and first published on 22 Dec 2016


Article type: Paper
DOI: 10.1039/C6EE03170F
Citation: Energy Environ. Sci., 2017,10, 377-382
  • Open access: Creative Commons BY license
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    Solar hydrogen production using epitaxial SrTiO3 on a GaAs photovoltaic

    L. Kornblum, D. P. Fenning, J. Faucher, J. Hwang, A. Boni, M. G. Han, M. D. Morales-Acosta, Y. Zhu, E. I. Altman, M. L. Lee, C. H. Ahn, F. J. Walker and Y. Shao-Horn, Energy Environ. Sci., 2017, 10, 377
    DOI: 10.1039/C6EE03170F

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