Abstract
Different types of zinc oxide(ZnO) nanostructures were prepared by electrochemical synthesis on an indium tin oxide(ITO) glass substrate by adjusting the concentration of the electrolyte,deposition time and tem-perature.X-ray diffraction(XRD),scanning electron microscope(SEM),high resolution transmission electron mi-croscope(HRTEM) and photoluminescence(PL) spectrum were to determine the characteristics of these ZnO nano structures.The results show that ZnO films is formed quickly at the voltage over a threshold.The ZnO films mor-phologies are determined by the concentration of the electrolyte.Nanobuds,nanorods,flakes can be obtained in turn with the concentration of Zn(NO3)2.6H2O increasing.Such different morphology formation mechanisms are dis-cussed on the basis of crystal growth theory.The PL spectra of the samples show that the flake ZnO films have a significant widen near edge emission peak with the depressed visible emission,which may have potential applica-tions on optoelectronic devices and sensors.
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