The Influence of the Spatial Orientation of ZnO Nanorods on the Luminescence Spectrum

摘要

Zinc oxide (ZnO) nanorods were grown on glass substrates coated with a conducting indium tin oxide film using the hydrothermal method. The nanorods are 2-2.5 mu m long and 70-200 nm in diameter. Under UV irradiation the nanorods exhibit photoluminescence with a maximum at 382 nm. It is found that changes in angle between the nanorods growth direction and the emission recording direction give rise to an appearance of a violet emission band centered at similar to 400 nm. It is possible dependence of the luminescence spectrum on the ZnO nanorods' spatial orientation is due to localization of the violet emission centers in the surface layer.