Photoluminescence of ZnO nanowires dependent on O2 and Ar annealing

Synthesis, characterization and optical properties of Zn1−xTixO nanoparticles prepared via a high-energy ball milling technique

“…The defects, for example oxygen vacancies, oxygen interstitials and zinc interstitials normally generated in ZnO crystals. These defects affect the optical properties as revealed in a few reports [25][26][27]. To confirm the influence of the defect concentration on the E g value, the curves of ln(a) versus E were plotted ( Fig.…”

Structural and photoluminescence properties of GaN/ZnO core‐shell nanowires with their shells sputtered

“…In previous study based on ZnO single crystals, the PL intensity of the emission band around 2.4 eV decreased by increasing the annealing temperature [29]. We surmise that the oxygen vacancies were annihilated by the thermal annealing, in which oxygen in ambient entered the ZnO shell and combined with oxygen vacancies at high temperature [29][30][31]. …”

In-situ visualization of a super-accelerated synthesis of zinc oxide nanostructures through CO2 laser heating

“…Another school of thought attributes the green band to other transitions such as between conduction band and Zn vacancy level [22,24,47]. Fortunately, these defects can be removed after suitable annealing [48], which will not hamper the further applications of the nanostructures produced by this simple but super-accelerated growth technique.…”