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采用阴极恒电位沉积方法,在Zn(NO3)2溶液中,用六亚甲基四胺作为形貌控制试剂,直接在氧化铟锡玻璃衬底上制备出透明致密的ZnO纳米棒阵列膜。通过X射线衍射、扫描电镜和能量色散谱表征了薄膜的形貌和结构,测量了ZnO纳米棒阵列膜的光学透射谱和光致发光谱。结果表明:所制备的具有c轴高度择优取向的ZnO纳米棒为高纯单晶纤锌矿结构,粒径约为200nm,膜的结晶度和表面平整度明显提高。ZnO薄膜在可见光区具有高透射率(>80%)和陡峭的吸收边缘,室温光致发光谱显示,在380nm处存在一个尖锐的强紫外发射峰和在510nm处存在一宽带弱绿光发射峰。
Transparent and dense ZnO nanorod array films were prepared directly on indium tin oxide glass substrates by using cathodic potentiostatic deposition method in the solution of Zn (NO3) 2 with hexamethylene tetramine as topography control reagent. The morphology and structure of the films were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. The optical transmission and photoluminescence spectra of ZnO nanorod arrays were measured. The results show that the prepared ZnO nanorods with c-axis highly preferred orientation are of high purity single crystal wurtzite structure with particle size of about 200 nm, and the crystallinity and surface flatness of the films are obviously improved. ZnO thin films have high transmittance (> 80%) and steep absorption edges in the visible region. The photoluminescence spectra at room temperature show that there is a sharp strong UV emission peak at 380 nm and a broad band weak green emission peak at 510 nm .