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

doi:10.3724/SP.J.1077.2011.00602

Abstract

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 temperature. X-ray diffraction (XRD), scanning electron microscope (SEM), high resolution transmission electron microscope (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 morphologies 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 discussed 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 applications on optoelectronic devices and sensors.

Key words: zinc oxide, nanostructures, electrochemical synthesis, photoluminescence

CLC Number:

TQ132

ZHANG Wen, HE Yong-Ning, ZHOU Cheng-Bo, CUI Wu-Yuan. Controlled Growth of Zinc Oxide Nano Structures by Electrochemical Synthesis and Their Photoluminescence Properties[J]. Journal of Inorganic Materials, 2011, 26(6): 602-606.

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