Photoelectrochemical behavior of n-type Si(111) electrodes coated with a single layer of graphene

Adam C. Nielander, Matthew J. Bierman, Nicholas Petrone, Nicholas C. Strandwitz, Shane Ardo, Fan Yang, James Hone, Nathan S Lewis

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The behavior of graphene-coated n-type Si(111) photoanodes was compared to the behavior of H-terminated n-type Si(111) photoanodes in contact with aqueous K3[Fe(CN)6]/K4[Fe(CN)6] as well as in contact with a series of outer-sphere, one-electron redox couples in nonaqueous electrolytes. The n-Si/Graphene electrodes exhibited stable short-circuit photocurrent densities of over 10 mA cm-2 for >1000 s of continuous operation in aqueous electrolytes, whereas n-Si-H electrodes yielded a nearly complete decay of the current density within ∼100 s. The values of the open-circuit photovoltages and the flat-band potentials of the Si were a function of both the Fermi level of the graphene and the electrochemical potential of the electrolyte solution, indicating that the n-Si/Graphene did not form a buried junction with respect to the solution contact.

Original languageEnglish
Pages (from-to)17246-17249
Number of pages4
JournalJournal of the American Chemical Society
Volume135
Issue number46
DOIs
Publication statusPublished - Nov 20 2013

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Graphite
Graphene
Electrodes
Electrolytes
Fermi level
Photocurrents
Short circuit currents
Contacts (fluid mechanics)
Oxidation-Reduction
Current density
Electrons
Networks (circuits)

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Photoelectrochemical behavior of n-type Si(111) electrodes coated with a single layer of graphene. / Nielander, Adam C.; Bierman, Matthew J.; Petrone, Nicholas; Strandwitz, Nicholas C.; Ardo, Shane; Yang, Fan; Hone, James; Lewis, Nathan S.

In: Journal of the American Chemical Society, Vol. 135, No. 46, 20.11.2013, p. 17246-17249.

Research output: Contribution to journalArticle

Nielander, AC, Bierman, MJ, Petrone, N, Strandwitz, NC, Ardo, S, Yang, F, Hone, J & Lewis, NS 2013, 'Photoelectrochemical behavior of n-type Si(111) electrodes coated with a single layer of graphene', Journal of the American Chemical Society, vol. 135, no. 46, pp. 17246-17249. https://doi.org/10.1021/ja407462g
Nielander, Adam C. ; Bierman, Matthew J. ; Petrone, Nicholas ; Strandwitz, Nicholas C. ; Ardo, Shane ; Yang, Fan ; Hone, James ; Lewis, Nathan S. / Photoelectrochemical behavior of n-type Si(111) electrodes coated with a single layer of graphene. In: Journal of the American Chemical Society. 2013 ; Vol. 135, No. 46. pp. 17246-17249.
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AU - Yang, Fan

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