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中文摘要：
采用化学回流法制备了3种不同粒径的ZnO纳米颗粒,然后旋涂在ITO玻璃衬底上,形成样品a、b和c 3种ZnO纳米颗粒薄膜。场发射扫描电子显微镜（FESEM）结果显示,3种样品晶粒都呈颗粒形状,形成的薄膜较平整,平均晶粒尺寸分别为5nm、25nm和40nm。X线衍射（XRD）结果表明,ZnO纳米颗粒为多晶六方晶系纤锌矿结构。样品a、b在可见光区有很少的光吸收,在紫外光区有很强的吸收,而由于纳米颗粒的直径较大,样品c在紫外和可见光区都存在很强的吸收。室温下的光致发光谱表明,样品a有一个近带边（NBE）紫外发射峰和蓝光发射峰,样品b、c出现一很宽的深能级缺陷相关的可见光发光带,这说明3种薄膜都存在大量的本征缺陷。
英文摘要：
ZnO nanoparticles with three different diameters were synthesized using a chemical refluxing route,which were then spin-coated on indium tin oxide coated glass substrates.Three ZnO nanoparticle thin films denoted as samples a,b and c was obtained.The results of FESEM images showed that the crystal grains in all thin films were approximately particle shape with an average size of 5 nm,25 nm and 40 nm,respectively,and all thin films were smooth.The XRD results indicated that ZnO nanoparticles displayed a hexagonal wurtzite structure.Samples a and b revealed weak absorption in the visible light region and strong absorption in the ultraviolet region,while the sample c both showed strong absorption in the visible and ultraviolet region,which was contributed to the ZnO nanoparticles with large diameter in the sample.Photoluminescence spectra at room temperature displayed that both a near band edge（NBE） ultraviolet photoluminescence peak and a blue peak were observed in sample a,both samples b and c exhibited a defect related deep level emission band.This was due to a large number of intrinsic defects in three thin films.
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