Aerosol-assisted CVD of bismuth vanadate thin films and their photoelectrochemical properties

Paul Brack, Jagdeep S. Sagu, T. A.Nirmal Peiris, Andrew McInnes, Mauro Senili, K. G.Upul Wijayantha, Frank Marken, Elena Selli

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Thin film bismuth vanadate (BiVO4) photoelectrodes are prepared by aerosol-assisted (AA)CVD for the first time on fluorinedoped tin oxide (FTO) glass substrates. The BiVO4 photoelectrodes are characterised by X-ray diffraction (XRD), Raman spectroscopy (RS), and energy-dispersive X-ray (EDX) spectroscopy and are found to consist of phase-pure monoclinic BiVO4. Scanning electron microscopy (SEM) analysis shows that the thin film is uniform with a porous structure, and consists of particles approximately 75-125 nm in diameter. The photoelectrochemical (PEC) properties of the BiVO4photoelectrodes are studied in aqueous 1M Na2SO4 and show photocurrent densities of 0.4 mA cm-2, and a maximum incident-photon-to-electron conversion efficiency (IPCE) of 19% at 1.23 V vs. the reversible hydrogen electrode (RHE). BiVO4 photoelectrodes prepared by this method are thus highly promising for use in PEC water-splitting cells.

Original languageEnglish
Pages (from-to)41-45
Number of pages5
JournalChemical Vapor Deposition
Volume21
Issue number1-3
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • AACVD
  • BiVO
  • Photoelectrochemical
  • Thin film
  • Water splitting

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces and Interfaces
  • Process Chemistry and Technology

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