Fig. 3. Optical properties of ZnO NPs and doped heterostructure: (a) the DRS-UV-vis spectra, (b and c) the respective direct and indirect Kubelka–Munk plots of ZnO and c-zac heterostructures, (d) the PL spectra of ZnO and 15c-zac heterostructure, (e and f) the ZnO and c-zac heterostructure Gaussian-shaped constituents of the deconvoluted plots. The inset label 15c-zac denotes the 15% dopant concentration.
