Abstract
We demonstrate a photoelectrochemical/photovoltaic (PEC/PV) device based on a combined configuration with a bismuth vanadate (BiVO 4 ) photoanode in the front and a thin film solar cell as power source in the rear. An optical model of this PEC/PV configuration is built by our in-house developed Advance Semiconductor Analysis (ASA) software. Micromorph (a-Si:H/nc-Si:H) cells are investigated in the optical model in reference to the photoanode filtered solar spectrum. The optimum micromorph cell with 400 nm a-Si:H i-layer is confirmed to have the best performance when combined with BiVO 4 photoanode. A solar-to-hydrogen efficiency of 5.2%, the highest conversion efficiency of metal oxide materials ever reported is achieved.
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