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Development of Chalcogenide Thin Film Materials for Photoelectrochemical Hydrogen Production

  • Nicolas Gaillard (a1), Dixit Prasher (a1), Jess Kaneshiro (a1), Stewart Mallory (a1) and Marina Chong (a1)...

Abstract

In the present communication, we report our efforts to integrate chalcogenide-based photoelectrochemical (PEC) materials into a standalone device capable of water-splitting using sunlight as the only source of energy. More specifically, the PEC performances of copper gallium diselenide are presented. First, a brief introduction to the material microstructural characteristics is presented. Then, the PEC properties are discussed, including incident-photonto-current efficiency (>60% in the visible), Faradaic efficiency (uncatalyzed, 86%) and durability (400 hours). Finally, we report the solar-to-hydrogen benchmark efficiency (3.7%) of a device made of a CuGaSe2 photocathode and a-Si solar cells measured in a 2-electrode configuration using a RuO2 counter electrode.

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