Figure 2From: Improved characteristics of near-band-edge and deep-level emissions from ZnO nanorod arrays by atomic-layer-deposited Al2O3 and ZnO shell layers PL spectra. (a) Room-temperature PL spectra of as-grown ZnO NRAs and those coated with Al2O3 shell layers of different thicknesses. (b) Normalized PL spectra of (a). The PL spectra were normalized to the peak intensity of the NBE emission.Back to article page