Controlled Growth of Zinc Oxide Nano Structures by Electrochemical Synthesis and Their Photoluminescence Properties

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.