Figure 4: Schematic view of the electric double layers at the n-type semiconductor/aqueous electrolyte interface (a) with corresponding charge (b) and potential (b) distributions. 𝑈 S is the potential drop across the space-charge layer, 𝑈 H is the potential drop in the Helmholtz layer, and 𝑈 G represents the drop in the Gouy-Chapman layer; (d) the equivalent circuit for the interface assuming that 𝑈 G can be neglected.