MRS Meetings and Events


EN02.12.03 2023 MRS Spring Meeting

Aerosol-Assisted Chemical Vapour Deposition of BiVO4 Photoanodes for Light-Driven Water Splitting

When and Where

Apr 13, 2023
4:15pm - 4:30pm

Moscone West, Level 2, Room 2002



Thom Harris-Lee1,2,Matthew Surman3,Andrew Johnson1,Frank Marken1

University of Bath1,Monash University2,ASM International3


Thom Harris-Lee1,2,Matthew Surman3,Andrew Johnson1,Frank Marken1

University of Bath1,Monash University2,ASM International3
Bismuth vanadate (BiVO<sub>4</sub>) is an outstanding candidate for visible-light driven water splitting due to its low production cost, high stability, low toxicity, and reasonable band gap with well-placed conduction and valence band edges relative to both hydrogen and oxygen evolution potentials.<sup>1</sup> In this presentation, the development and application of new and novel precursor systems tailor-made for the dual-source aerosol-assisted chemical vapour deposition (AACVD) of highly nanostructured, phase-pure monoclinic-scheelite BiVO<sub>4</sub> thin films is outlined. Having identified the ‘best in show’ precursors for AACVD application, the BiVO<sub>4</sub> thin film deposition conditions are optimised for the most suitable precursor ratios and deposition temperatures for high quality films, with variations in nanostructure as a function of deposition time also being investigated in parallel by scanning electron microscopy (SEM). Light-driven water splitting performance is then evaluated using standard techniques including UV/Vis spectroscopy, linear sweep voltammetry under simulated sunlight irradiation, incident photon-to-current efficiency (IPCE) measurements, chronoamperometry, and electrochemical impedance spectroscopy (EIS). Pristine BiVO<sub>4</sub> films yielded photocurrent densities of 1.23 mAcm<sup>-2</sup> at 1.23 V vs RHE, the highest photocurrent density of any CVD-grown BiVO<sub>4</sub> film to date.<br/><br/>The potential of AACVD for semiconductor doping and hybridisation studies are discussed, most importantly the compatibility of new metal precursors with existing ones. This is exemplified by the facile deposition of W-doped BiVO<sub>4</sub> without adding complexity or steps to the process. This work provides a roadmap in which an effective ‘toolbox’ of cross-compatible metal precursors can be rapidly deployed with AACVD to fabricate a range of doped and/or mixed-metal materials with high photocatalytic performance.<br/> <br/> <br/><b>References</b><br/>1 C. Jiang, S. J. A. Moniz, A. Wang, T. Zhang, J. Tang, <i>Chem. Soc. Rev.</i>, 2017, <b>46</b>, 4645–4660.


chemical vapor deposition (CVD) (deposition)

Symposium Organizers

Eric Colegrove, National Renewable Energy Laboratory
Jessica de Wild, imec
Byungha Shin, Korea Advanced Institute of Science and Technology
Colin Wolden, Colorado School of Mines

Publishing Alliance

MRS publishes with Springer Nature