BiVO-Liquid Junction Photovoltaic Cell with 0.2% Solar Energy Conversion Efficiency.

BiVO is an important photoanode material for water oxidation, but its photoelectrochemistry regarding the triiodide/iodide redox couple is not well understood. Here, we use a combination of open circuit potential measurements, photoelectrochemical scans, and liquid surface photovoltage spectroscopy (SPS) to confirm that BiVO/triiodide/iodide electrolyte contacts produce up to 0.55 V photovoltage under 23 mW/cm illumination from a 470 nm LED.