Optical Properties Of Zinc Oxide Nanorods Doped With Co By Two-step Method

In recent years，more and more attention has been abstracted to low dimensionnanostructure semiconductor materials, which gradually shows its potential advantage in thisfield.Zinc Oxide is a kind of Ⅱ-VI direct band gap oxide semiconductor material, itsforbidden band width is about3.37eV at room temperature. Its electron binding energy is ashigh as60mev, optical gain coefficient is300cm-1. At present, because of excellentperformance in many ways, zinc oxide have very broad application prospects inphotocatalytic materials, piezoelectric materials, nano laser, surface acoustic wave devices,waveguide, optical switch, UV detector, solar cells and other fields.Zinc oxide is a new kindof material with huge potential application nowadays.In this thesis, the experiment is mainly consists of two processes，one is the seed crystallayer prepared by spray pyrolysis method and the other is nanorods prepared by hydrothermalmethod.In the first part of the thesis, the structure and properties of ZnO were introduced mainly.In the second part of the thesis, several preparation methods of Zinc Oxide nano materialstructure were introduced in brief.In the third part of the thesis, spray pyrolysis and hydrothermal prepared nano ZincOxide materials and several characterization methods were analyzed detailedly.In the fourth part of the thesis, the ultrasonic spray pyrolysis process of the preparationof ZnO seed crystal layer and the change of corresponding parameters impact on the finalresult of the experiment were illustrated firstly. Then on the basis of the above experiments,ZnO nanostructures doped with Cobalt were prepared by hydrothermal method. Finally, Thesamples were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD),Photoluminescence spectroscopy (PL) and transmission spectrum to understand structure,surface morphology and optical properties.Experimental results showed that the sampleprepared for20s with the doping concent of0.03had optimum orientational crystallization.And the more the incorporation of Co, the higher the transmittance in the visible light range.