CaltechAUTHORS
Published 2016 | Version Supplemental Material + Published
Journal Article Open

Si/TiO_2 Tandem-Junction Microwire Arrays for Unassisted Solar-Driven Water Splitting

Creators

  • 1. ROR icon California Institute of Technology
  • 2. ROR icon Joint Center for Artificial Photosynthesis

Abstract

Tandem-junction microwire array photoelectrodes have been fabricated by coating np^+-Si radial homojunction microwire arrays sequentially with fluorine-doped tin oxide (FTO) and titanium dioxide (TiO_2). These photoelectrodes effected unassisted water splitting under simulated 1 Sun conditions with an open-circuit potential (E_(oc)) of −1.5 V vs the formal potential for oxygen evolution, E^(0′)(OH^−/O_2), a current density at E = E^(0′)(OH^−/O_2) of 0.78 mA cm^(−2), a fill factor ( ff ) = 0.51, and a photovoltaic-biased photoelectrochemical ideal regenerative cell efficiency of 0.6%.

Additional Information

© 2016 The Electrochemical Society. Manuscript submitted October 23, 2015; revised manuscript received December 17, 2015. Published January 15, 2016. The authors acknowledge Stefan Omelchenko for assistance with the XRD measurements, John Lloyd for discussions about the cTLM measurements and Dr. Shawn Chatman for providing the Xe arc lamp spectral irradiance data. This material is based upon work performed by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, supported through the Office of Science of the U.S. Department of Energy under Award Number DE-SC0004993. M.R.S. acknowledges the Resnick Sustainability Institute for a graduate fellowship.

Attached Files

Published - J._Electrochem._Soc.-2016-Shaner-H261-4.pdf

Supplemental Material - README.txt

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J._Electrochem._Soc.-2016-Shaner-H261-4.pdf

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Additional details

Identifiers

Eprint ID
64889
Resolver ID
CaltechAUTHORS:20160301-075443518

Related works

Describes
http://jes.ecsdl.org/content/163/5/H261/suppl/DC1 (URL)

Funding

Department of Energy (DOE)
DE-SC0004993
Resnick Sustainability Institute

Dates

Created
2016-03-01
Created from EPrint's datestamp field
Updated
2021-11-10
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
Resnick Sustainability Institute, JCAP