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Photoelectrochemical Hydrogen Evolution Using Si Microwire Arrays

Boettcher, Shannon W. and Warren, Emily L. and Putnam, Morgan C. and Santori, Elizabeth A. and Turner-Evans, Daniel and Kelzenberg, Michael D. and Walter, Michael G. and McKone, James R. and Brunschwig, Bruce S. and Atwater, Harry A. and Lewis, Nathan S. (2011) Photoelectrochemical Hydrogen Evolution Using Si Microwire Arrays. Journal of the American Chemical Society, 133 (5). pp. 1216-1219. ISSN 0002-7863. doi:10.1021/ja108801m.

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Arrays of B-doped p-Si microwires, diffusion-doped with P to form a radial n+ emitter and subsequently coated with a 1.5-nm-thick discontinuous film of evaporated Pt, were used as photocathodes for H_2 evolution from water. These electrodes yielded thermodynamically based energy-conversion efficiencies >5% under 1 sun solar simulation, despite absorbing less than 50% of the above-band-gap incident photons. Analogous p-Si wire-array electrodes yielded efficiencies <0.2%, largely limited by the low photovoltage generated at the p-Si/H_2O junction.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Boettcher, Shannon W.0000-0001-8971-9123
Warren, Emily L.0000-0001-8568-7881
Kelzenberg, Michael D.0000-0002-6249-2827
McKone, James R.0000-0001-6445-7884
Brunschwig, Bruce S.0000-0002-6135-6727
Atwater, Harry A.0000-0001-9435-0201
Lewis, Nathan S.0000-0001-5245-0538
Additional Information:© 2011 American Chemical Society. Received: October 10, 2010. Published In Issue February 09, 2011. Article ASAP January 07, 2011. The Department of Energy (DE-FG02-05ER15754), the Stanford Global Climate and Energy Project, and Toyota are acknowledged for financial support. S.W.B thanks the Kavli Nanoscience Institute for a postdoctoral fellowship. M.G.W acknowledges support from an NSF American Competitiveness in Chemistry postdoctoral fellowship (CHE-0937048).
Group:Kavli Nanoscience Institute
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-05ER15754
Stanford Global Climate and Energy ProjectUNSPECIFIED
Kavli Nanoscience InstituteUNSPECIFIED
NSF Postdoctoral FellowshipCHE-0937048
Issue or Number:5
Record Number:CaltechAUTHORS:20110314-101144886
Persistent URL:
Official Citation:Photoelectrochemical Hydrogen Evolution Using Si Microwire Arrays Shannon W. Boettcher, Emily L. Warren, Morgan C. Putnam, Elizabeth A. Santori, Daniel Turner-Evans, Michael D. Kelzenberg, Michael G. Walter, James R. McKone, Bruce S. Brunschwig, Harry A. Atwater, Nathan S. Lewis Journal of the American Chemical Society 2011 133 (5), 1216-1219
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:22849
Deposited By: Tony Diaz
Deposited On:15 Mar 2011 21:45
Last Modified:09 Nov 2021 16:08

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