Charge carrier mapping for Z-scheme photocatalytic water-splitting sheet via categorization of microscopic time-resolved image sequences

Abstract Photocatalytic water splitting system using particulate semiconductor materials is a promising strategy for converting solar energy into hydrogen and oxygen. In particular, visible-light-driven ‘Z-scheme’ printable photocatalyst sheets are cost-effective scalable. However, little known about the fundamental photophysical processes, which key to explaining promoting photoactivity. Here, we applied pattern-illumination time-resolved phase microscopy sheet composed of Mo-doped BiVO 4 Rh-doped SrTiO 3 with indium tin oxide as electron mediator investigate photo-generated charge carrier dynamics. Using this method, successfully observed position- structure-dependent behavior visualized active/inactive sites in under light irradiation via time sequence images clustering analysis. This combination methodology could provide material/synthesis optimization methods maximum performance sheets.