Effect of charge selective contacts on the quasi Fermi level splitting of CuGa₃Se₅ thin film photocathodes for hydrogen evolution and methylviologen reduction

Abstract

The defect-copper chalcopyrite CuGa 3 Se 5 is a promising photocathode material for solar hydrogen generation. Here we assess its performance with photoelectrochemical measurements and vibrating Kelvin probe surface photovoltage spectroscopy.