Fig. 14.
The results of a UV-visible spectra and b Tauc plots for ZnO, Zn0.99Cu0.01O and Zn0.99Mn0.01O samples annealed at 300 °C
The results of a UV-visible spectra and b Tauc plots for ZnO, Zn0.99Cu0.01O and Zn0.99Mn0.01O samples annealed at 300 °C