Multiple Effects Induced by Mo ⁶⁺ Doping in BiVO ₄ Photoanodes

Mo6+ doping increases the photoelectrochemical performance of BiVO4 photoanodes in water oxidation. Here we elucidate underlying mechanisms through a systematic structural, morphological and investigation on photoelectrodes pure doped prepared by novel multi-step spin coating deposition approach, leading to multilayer flat films with high optical transparency. Transient absorption spectroscopy nano- micro-second time scale reveals longer lifetime photogenerated holes films. Besides confirming that ions improve electron transport material bulk, impedance also crucial role dopant surface properties photoanodes. The presence intra band gap states, acting as traps charge carriers BiVO4, is detected build-up interfacial state capacitance. limited activity oxidation largely improved upon 3 at% incorporation, ensuring more efficient carrier respect together beneficial passivation its trap states. This article protected copyright. All rights reserved.