Fig. 4: Tandem silicon-perovskite photoanode unassisted water-splitting performance. | Nature Communications

Fig. 4: Tandem silicon-perovskite photoanode unassisted water-splitting performance.

From: Integrated halide perovskite photoelectrochemical cells with solar-driven water-splitting efficiency of 20.8%

Fig. 4: Tandem silicon-perovskite photoanode unassisted water-splitting performance.The alternative text for this image may have been generated using AI.

a Schematic representation of the unassisted PEC water-splitting system using HaP/Si tandem. b Optical images of absorber (top) and catalytic (bottom) faces of transformed silicon-perovskite photoanode. c HaP/Si tandem photovoltaic J-V curve. Scale bars are 1 cm. d 2-electrode J-V curve of photoanode from champion device showing a theoretical operating current density of 16.9 mA/cm2. e 2-electrode unassisted water-splitting over time. f IrOx nanoparticulate and Pt foil electrocatalyst 2-electrode time-dependent voltage at 15 mA/cm2. g Comparison among other integrated PEC-type devices with respect to STH and lifetime at t60. Demonstrations not reaching t60 are shown with full reported lifetime.

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