We will present the electron transport properties of intrinsic and Mo-doped BiVO4 photoanodes. In particular, two techniques are used to study the effect of Mo doping on the electron transport: (1) an analysis of the front/back illumination ratio of incident photon-to-current efficiency and (2) intensity modulated photocurrent spectroscopy. These techniques show that Mo doping drastically improves the diffusion coefficient and the diffusion length is increased from < 10 nm to ca. 300 nm. Based on this knowledge, we will also present the performance of Mo:BiVO4 photoanodes for photoelectrolysis and the impacts of surface modification with a heterogeneous catalyst on the water oxidation performance. Finally, new strategies to overcome the electron transport limitations in this metal oxide photoabsorber will be discussed.

Efficient solar photoelectrolysis by Mo:BiVO<sub>4</sub> through controlled electron transport

247th National Meeting (2014)

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Efficient solar photoelectrolysis by Mo:BiVO4 through controlled electron transport

Efficient solar photoelectrolysis by Mo:BiVO₄ through controlled electron transport