Luminescence properties of hydrothermally grown ZnO nanorods. (November 2016) - Yatskiv, R.
Abstract: A steady-state photoluminescence (PL) from hydrothermally grown ZnO nanorods is investigated. First, the temperature-dependent PL spectra of the as grown ZnO nanorods in the near-band-edge (NBE) region and in the deep-level (DL) region are discussed. Second, the description of the effect of annealing in nitrogen and in vacuum on the PL spectra at 4 K is given. Annealing in both nitrogen and vacuum significantly alter the intensity ratio of the NBE-to-DL emission and lead to greatly enhanced optical quality of the ZnO nanorods. Finally, the influence of the size of the ZnO nanorods on their 4K PL spectra is analyzed. Highlights: Temperature-dependent PL spectra of ZnO nanorods grown by hydrothermal method were investigated. Influence of the size of ZnO nanorods on their PL spectra was analyzed. Annealing in nitrogen and vacuum was shown to significantly improve structural and optical properties of ZnO nanorods.