Journal
NANO LETTERS
Volume 13, Issue 9, Pages 4356-4361Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl402156e
Keywords
Nanowire; InGaN; photoelectrochemical water splitting; hydrogen; solar fuels
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Fonds de recherche sur la nature et les technologies
- McGill University
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We report on the first demonstration of stable photoelectrochemical water splitting and hydrogen generation on a double-band photoanode in acidic solution (hydrogen bromide), which is achieved by InGaN/CaN core/shell nanowire arrays grown on Si substrate using catalyst-free molecular beam epitaxy. The nanowires are doped n-type using Si to reduce the surface depletion region and increase current conduction. Relatively high incident-photon-to-current-conversion efficiency (up to similar to 27%) is measured under ultraviolet and visible light irradiation. Under simulated sunlight illumination, steady evolution of molecular hydrogen is further demonstrated.
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