Cu-doped ZnO Nanostructures Preparation And Physical Properties Studies

ZnO is a important semiconductor material due to its unique nature which recently became research focus. In this paper, preparation of Cu-doped ZnO nanostructures was realized which use the Cu as doping source, then, we analyzed the influence of different doping properties of ZnO. Following work was completed:1. The hexagonal structure Cu-doped ZnO nanoparticles with different doping properties was successfully prepared by sol-gel method. In addition, by X-radiation spectroscopy found that the sample only Zn, Cu and O elements. Through SEM and TEM test, the diameter of sample is range in20-30nm. In addition, a reunion function was happen in these particles, at the same time the distribution is more uniform, we consider that a direct relationship with the prepared process and the characteristics of nanomaterials.2. By X-ray photoelectron spectroscopy analysis, the chemical state of doping element change when doping concentration change which according with XRD data. In other hand, It can be found that the absorption edge of the sample are between375-390nm through the test study of UV-visible absorption spectra. With the doping ratio increases, the absorption band of the band width increases, the intensity decreased, and red-shifted was appeared. The use of photoluminescence spectra of the prepared samples for the study of optical properties and found that only3%of the doping concentration in the sample at380nm with a near-UV exciton peak, However, with Cu doping concentration increased, the spectrum peaks weaken and a weak red shift appeared.3. The test for magnetic properties show that we successfully prepared samples with ferromagnetism. The largest saturation magnetization and coercivity were0.043emu/g and425Oe, the minimum saturation magnetization and coercivity were0.006emu/g and86Oe. Illustrate this with the excellent optical properties of doped nanostructures have good magnetic properties are therefore better prospects.