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Title: High performance III-V photoelectrodes for solar water splitting via synergistically tailored structure and stoichiometry

Abstract

Catalytic interface of semiconductor photoelectrodes is important for high-performance photoelectrochemical solar water splitting because of its multiple roles in light absorption, electrocatalysis, and corrosion protection. Nevertheless, simultaneously optimizing each of these processes represents a materials conundrum owing to conflicting requirements of materials attributes at the electrode surface. In this work we show an approach that can circumvent these challenges by collaboratively exploiting corrosion-resistant surface stoichiometry and structurally-tailored reactive interface. Nanoporous, density-graded surface of ‘black’ gallium indium phosphide (GaInP 2), when combined with ammonium-sulfide-based surface passivation, effectively reduces reflection and surface recombination of photogenerated carriers for high efficiency photocatalysis in the hydrogen evolution half-reaction, but also augments electrochemical durability with lifetime over 124 h via strongly suppressed kinetics of corrosion. Such synergistic control of stoichiometry and structure at the reactive interface provides a practical pathway to concurrently enhance efficiency and durability of semiconductor photoelectrodes without solely relying on the development of new protective materials.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2];  [2]; ORCiD logo [2]; ORCiD logo [1]
  1. Univ. of Southern California, Los Angeles, CA (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (EE-3F); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S); National Science Foundation (NSF)
OSTI Identifier:
1550785
Report Number(s):
NREL/JA-5900-71473
Journal ID: ISSN 2041-1723
Grant/Contract Number:  
AC36-08GO28308; ECCS-1509897; CBET-1707169
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 77 NANOSCIENCE AND NANOTECHNOLOGY; III-V semiconductor; photoelectrolysis; anti-reflection; devices for energy harvesting; nanoscale materials; photocatalysis

Citation Formats

Lim, Haneol, Young, James L., Geisz, John F., Friedman, Daniel J., Deutsch, Todd G., and Yoon, Jongseung. High performance III-V photoelectrodes for solar water splitting via synergistically tailored structure and stoichiometry. United States: N. p., 2019. Web. doi:10.1038/s41467-019-11351-1.
Lim, Haneol, Young, James L., Geisz, John F., Friedman, Daniel J., Deutsch, Todd G., & Yoon, Jongseung. High performance III-V photoelectrodes for solar water splitting via synergistically tailored structure and stoichiometry. United States. doi:10.1038/s41467-019-11351-1.
Lim, Haneol, Young, James L., Geisz, John F., Friedman, Daniel J., Deutsch, Todd G., and Yoon, Jongseung. Mon . "High performance III-V photoelectrodes for solar water splitting via synergistically tailored structure and stoichiometry". United States. doi:10.1038/s41467-019-11351-1. https://www.osti.gov/servlets/purl/1550785.
@article{osti_1550785,
title = {High performance III-V photoelectrodes for solar water splitting via synergistically tailored structure and stoichiometry},
author = {Lim, Haneol and Young, James L. and Geisz, John F. and Friedman, Daniel J. and Deutsch, Todd G. and Yoon, Jongseung},
abstractNote = {Catalytic interface of semiconductor photoelectrodes is important for high-performance photoelectrochemical solar water splitting because of its multiple roles in light absorption, electrocatalysis, and corrosion protection. Nevertheless, simultaneously optimizing each of these processes represents a materials conundrum owing to conflicting requirements of materials attributes at the electrode surface. In this work we show an approach that can circumvent these challenges by collaboratively exploiting corrosion-resistant surface stoichiometry and structurally-tailored reactive interface. Nanoporous, density-graded surface of ‘black’ gallium indium phosphide (GaInP2), when combined with ammonium-sulfide-based surface passivation, effectively reduces reflection and surface recombination of photogenerated carriers for high efficiency photocatalysis in the hydrogen evolution half-reaction, but also augments electrochemical durability with lifetime over 124 h via strongly suppressed kinetics of corrosion. Such synergistic control of stoichiometry and structure at the reactive interface provides a practical pathway to concurrently enhance efficiency and durability of semiconductor photoelectrodes without solely relying on the development of new protective materials.},
doi = {10.1038/s41467-019-11351-1},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {2019},
month = {7}
}

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Works referenced in this record:

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