关键词: ZnO;纳米棒;水热法;浸渍-提拉法;光致发光

Abstract: ZnO Nanorod arrays were grown on the FTO conductive glass by two steps method.First the seed layer of ZnO nano-particles was prepared on FTO glass by dip-coating method.Then ZnO nanorods were grown on the seed layer through hydrothermal method.The influence of hydrothermal growth parameters such as reactant concentration,growth temperature and time on the microstructure and optical properties of ZnO nanorod arrays were investigated.The microstructure and optical properties of ZnO nanorod arrays were characterized by X-ray diffraction(XRD), scanning electron microscope(SEM), photoluminescence(PL)spectroscopy.The results show that the as-grown ZnO nanorod arrays are in shape of hexagonal columnar with wurtzite structure, growth perpendicular to the FTO conductive glass, good orientation along the c-axis.The average diameter and the length of nanorods are about 100 nm and 2.5 μm,respectively.The as-prepared ZnO nanorods have a strong UV emission peak near 390 nm and a weak green emission peak near 550 nm.

Key words: ZnO;nanorod;hydrothermal method;dip-coating method;photoluminescence