Functional integration of Ni–Mo electrocatalysts with Si microwire array photocathodes to simultaneously achieve high fill factors and light-limited photocurrent densities for solar-driven hydrogen evolution

An n + p-Si microwire array with a Ni–Mo/TiO 2 catalyst/light-scattering bi-layer structure that simultaneously achieves high fill factors and light-limited photocurrent densities for direct solar H 2 (g) production.