title: The effect of Mo doping on the charge separation dynamics and photocurrent performance of BiVO4photoanodes.
abstract: Doping with electron-rich elements in BiVO4photoanodes has been demonstrated as a desirable approach for improving their carrier mobility and charge separation efficiency. However, the effect of doping and dopant concentration on the carrier dynamics and photoelectrochemical performance remains unclear. In this work, we examined the effects of Mo doping on the charge separation dynamics and photocurrent performance in BiVO4photoanodes. We show that the photocurrent of BiVO4photoanodes increases with increasing concentration of the Mo dopant, which can be attributed to both the improved carrier mobility resulting from increased electron density and charge separation efficiency due to the diminishing of trap states upon Mo doping. The effect of doping on the electronic structure, carrier dynamics and photocurrent performance of BiVO4photoanodes resulting from W and Mo dopants was also compared and discussed in this study. The knowledge gained from this work will provide important insights into the optimization of the carrier mobility and charge separation efficiency of BiVO4photoanodes by controlling the dopants and their concentrations.
authors.affiliation: Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201, USA. jierhuang@marquette.edu.
authors.forename: Brian
authors.initials: B
authors.lastname: Pattengale
authors.affiliation: Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201, USA. jierhuang@marquette.edu.
authors.forename: Jier
authors.initials: J
authors.lastname: Huang