Efficient Continuous Light?Driven Electrochemical Water Splitting Enabled by Monolithic Perovskite?Silicon Tandem Photovoltaics

Solar-assisted water electrolysis is a promising technology for storing the energy of incident solar irradiation into hydrogen as fuel. Here, an integrated continuous flow electrochemical reactor coupled to monolithic perovskite-silicon tandem cell demonstrated that provides light-driven solar-to-hydrogen conversion with efficiency exceeding 21% at 1-Sun equivalent light intensity and stable operation during three simulated day-night cycles.