Si/TiO2 tandem-junction microwire arrays for unassisted solar-driven water splitting

Matthew R. Shaner, Matthew T. McDowell, Alex Pien, Harry A. Atwater, Nathan S Lewis

Research output: Contribution to journalArticle

12 Citations (Scopus)

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 (TiO2). These photoelectrodes effected unassisted water splitting under simulated 1 Sun conditions with an open-circuit potential (EOC) of -1.5 V vs the formal potential for oxygen evolution, E0/(OH-/O2), a current density at E = E 0'(OH-/O2) of 0.78 mA cm-2, a fill factor (ff) = 0.51, and a photovoltaic-biased photoelectrochemical ideal regenerative cell efficiency of 0.6%.

Original languageEnglish
Pages (from-to)H261-H264
JournalJournal of the Electrochemical Society
Volume163
Issue number5
DOIs
Publication statusPublished - 2016

Fingerprint

water splitting
Tin oxides
Fluorine
Sun
Titanium dioxide
Current density
Coatings
homojunctions
Oxygen
Water
Networks (circuits)
titanium oxides
tin oxides
fluorine
sun
current density
coatings
oxygen
cells
hydroxide ion

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

Si/TiO2 tandem-junction microwire arrays for unassisted solar-driven water splitting. / Shaner, Matthew R.; McDowell, Matthew T.; Pien, Alex; Atwater, Harry A.; Lewis, Nathan S.

In: Journal of the Electrochemical Society, Vol. 163, No. 5, 2016, p. H261-H264.

Research output: Contribution to journalArticle

Shaner, Matthew R. ; McDowell, Matthew T. ; Pien, Alex ; Atwater, Harry A. ; Lewis, Nathan S. / Si/TiO2 tandem-junction microwire arrays for unassisted solar-driven water splitting. In: Journal of the Electrochemical Society. 2016 ; Vol. 163, No. 5. pp. H261-H264.
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