Extended Data Fig. 2: Light-response characterization and theoretical maximum STH.
From: Solar-to-hydrogen efficiency of more than 9% in photocatalytic water splitting
a, UV-vis diffuse reflectance spectroscopy of InGaN/GaN suggests that the visible-light-response range of InGaN/GaN nanostructures is extended to 632 nm (1.96 eV). b, Band diagram of InGaN/GaN segments. c, d, Wavelength-dependent theoretical maximum STH in (c) natural solar light and (d) simulated solar light produced by a Xe lamp equipped with a standard AM1.5G filter from Newport Corporation. The red dashed line corresponds to a photocatalyst with bandgap of 1.96 eV (632 nm).
