Thin film bismuth vanadate (BiVO4) photoelectrodes are prepared by aerosol-assisted (AA)CVD for the first time on fluorine-doped 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 approximatively 75-125 nm in diameter. The photoelectrochemical (PEC) properties of the BiVO4 photoelectrodes are studied in aqueous 1 M 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.

Aerosol-assisted CVD of bismuth vanadate thin films and their photoelectrochemical properties / P. Brack, J.S. Sagu, T.A. Nirmal Peiris, A. McInnes, M. Senili, K.G.U. Wijantha, F. Marken, E. Selli. - In: CHEMICAL VAPOR DEPOSITION. - ISSN 0948-1907. - 21:1-3(2015 Mar), pp. 41-45. [10.1002/cvde.201407142]

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

E. Selli
2015-03

Abstract

Thin film bismuth vanadate (BiVO4) photoelectrodes are prepared by aerosol-assisted (AA)CVD for the first time on fluorine-doped 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 approximatively 75-125 nm in diameter. The photoelectrochemical (PEC) properties of the BiVO4 photoelectrodes are studied in aqueous 1 M 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.
AACVD; BiVO4; photoelectrochemical; thin film; water splitting
Settore CHIM/02 - Chimica Fisica
CHEMICAL VAPOR DEPOSITION
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/268096
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