Precursor Development and Aerosol-Assisted Chemical Vapour Deposition for BiVO4 and W-doped BiVO4 Photoanodes: A Universal Ligand Approach

Andrew Johnson, Thom Harris-Lee, Matthew Surman, Andrew Straiton, Frank Marken

Research output: Contribution to journalArticlepeer-review

Abstract

Green hydrogen production is a key area of importance for advancing into a completely sustainable world, not only for its use in industry and ammonia production, but also for its potential as a new fuel. One promising method for generating green hydrogen is light-driven water splitting using photoelectrodes. Here, a bismuth vanadate (BiVO4) photoanode deposition process was developed using new, bespoke dual-source precursors, tailored for use in aerosol-assisted chemical vapour deposition (AACVD). The resulting thin films were highly nanostructured and consisted of phase-pure monoclinic BiVO4. Pristine films under 1 sun solar irradiation yielded photocurrent densities of 1.23 mA cm-2 at 1.23 V vs RHE and a peak incident photon-electron conversion efficiency (IPCE) of 82% at 674 nm, the highest performance of any CVD-grown BiVO4 film to date. A new, AACVD-compatible WO3 precursor was subsequently designed and synthesised for the deposition of W-doped BiVO4 within the same single deposition step.
Original languageEnglish
Article number e202401452
JournalChemSusChem
Early online date10 Oct 2024
DOIs
Publication statusE-pub ahead of print - 10 Oct 2024

Keywords

  • photo-electrochemistry
  • water splitting,
  • BiVO4
  • doping
  • AACVD

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