Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published February 9, 2011 | Supplemental Material
Journal Article Open

Photoelectrochemical Hydrogen Evolution Using Si Microwire Arrays

Abstract

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.

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).

Attached Files

Supplemental Material - ja108801m_si_001.pdf

Files

ja108801m_si_001.pdf
Files (916.0 kB)
Name Size Download all
md5:4212bf1ee7b15cadda01fbc3b6ac7868
916.0 kB Preview Download

Additional details

Created:
August 19, 2023
Modified:
October 23, 2023