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Nano Lett. 2012 Jan 11;12(1):298-302. doi: 10.1021/nl203564s. Epub 2011 Dec 13.

Enhanced photoelectrochemical hydrogen production from silicon nanowire array photocathode.

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  • 1K.A.N.C., Suwon, Gyeonggi 443-270, Republic of Korea.


Herein we report that silicon nanowires (SiNWs) fabricated via metal-catalyzed electroless etching yielded a photoelectrochemical hydrogen generation performance superior to that of a planar Si, which is attributed to a lower kinetic overpotential due to a higher surface roughness, favorable shift in the flat-band potential, and light-trapping effects of the SiNW surface. The SiNW photocathode yielded a photovoltage of 0.42 V, one of the highest values ever reported for hydrogen generation on p-type Si/electrolyte interfaces.

© 2011 American Chemical Society

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