Figure 2.

PL data. Panel (A): (a) PL UV-peak of nanorods annealed at different temperatures in a Zn-rich atmosphere, (b) UV-peak intensity as a function of annealing temperature for samples annealed in a Zn-rich atmosphere and air, (c) Infrared spectroscopy of ZnO nanorod arrays as a function of temperature. Panel (B): (a) and (b) PL visible band of nanorods annealed at different temperatures in a Zn-rich atmosphere and air, respectively, and (c) area under PL visible band as a function of annealing temperature for samples annealed in a Zn-rich atmosphere and air. Defect evolution trends are indicated by a red arrow for annealing in Zn atmosphere and by a blue arrow for annealing in air. UN indicates un-annealed.