Synthesis And Optical Properties Of Doped Zno One- Dimension Nanostructures

One-dimensional nanostructures has promising application in nanodevices due to their unique physical and chemical properties. Studying one- dimensional material can help us to research the influence of low dimension and quantum-limited effect to the properties of electricity, thermology and the mechanics. In recent years, scientists have paid more attention on nanometerscale materials. Among them, semiconductor zinc oxide (ZnO) with direct wide band gap (Eg=3.37 eV) and the large exciton binding energy (60 meV at room temperature) has attracted considerable attention as one of potential candidate materials for ultraviolet laser devices. Meanwhile, it also has a lot of other excellent properties, such as piezo-electricity, surface polariton function, high luminescence efficiency, high chemistry stability and thermal stability, which show great applied potential in the field of nanometerscale electronics apparatus and photoelectron apparatus. So far, the synthesis of one-dimensional ZnO nanostructure has already obtained important progress and different morphologies has been achieved. In addition, doping in ZnO has been an attractive research subject in order to adjust its optical, electrical and magnetic properties.In this paper, Al, Sb, In-doped zinc oxide nanostructures with different morphologies were synthesized on silicon substrates by chemical vapor deposition. The morphologies and structures of the samples were characterized by X-ray diffraction, scanning electron microscopy, and high resolution transmission electron microscopy. The optical properties of samples were studied by photoluminescence spectra. The XRD results Al-doped show that with the increase of Al concentration, ZnO with hexagonal wurzite crystal structure transforms gradually into ZnAl2O4 with spinel structure ; Room temperature(RT) show that ultraviolet peak firstly blue-shifts due to Burstein-Moss effect and then red-shifts due to band gap renormalization effect . The nanowires and nanospirals were synthesized using a mixture of ZnO powders and Sb as precursor by a chemical vapor deposition method. And we discussed the photoluminescence of the samples . The intensity ratio of uv and visible was 48:1.