Figure 4From: Photocurrent enhancement mechanisms in bilayer nanofilm-based ultraviolet photodetectors made from ZnO and ZnS spherical nanoshellsUV-vis absorption spectra. (a) UV-vis absorption spectra of the ZnO, ZnO/ZnS, and ZnS/ZnO nanofilms. (b) Absorption spectra simulated from the ZnO, ZnO/ZnS, and ZnS/ZnO nanofilm structures.Back to article page