中文摘要：

采用低温热分解法制备Zn1-xMgxO（x=0,0.03）纳米材料,利用X射线衍射（XRD）、光致发光（PL）和拉曼光谱分析研究了Mg的掺杂对样品的结构和光学特性的影响.另外,还利用能量弥散X射线能谱仪（EDX）对样品的元素含量进行了表征.结果表明,Zn0.97Mg0.03O具有和ZnO一样的衍射谱,为六方纤锌矿结构.但是,随着Mg的掺入,样品Zn0.97Mg0.03O的结晶有序性遭到一定程度的破坏,结晶质量下降.XRD和EDX结果证明了Mg成功掺入ZnO晶格中,形成了替位式掺杂.在拉曼光谱中,位于434 cm-1处的E2（H）模式的出现表明样品为六角纤锌矿结构的ZnO.室温光致发光谱出现很强的紫外近带发射峰,没有观察到深能级发射,且随着Mg的掺入,紫外发射峰发生蓝移.

英文摘要：

Zn1-xMgxO（x=0,0.03） nanomaterials were prepared at low temperature through thermal decomposition method.The structures and optical properties were investigated by the methods of X-ray diffraction（XRD）,photoluminescence（PL） and Raman spectrum,respectively.The composition was analyzed by energy dispersive x-ray spectroscopy（EDX）.The results showed that the as-prepared Zn1-xMgxO（x=0,0.03） had a hexagonal wurtzite structure,and all the samples kept the overall crystal structure of bulk ZnO,but the crystallization of Zn0.97Mg0.03O became worse.XRD and EDX results demonstrated that Mg ions were successfully incorporated into the ZnO host lattice and substituted for Zn ions.In Raman spectra,the appearance of the E2（high） mode peaked at around 434 cm-1 was typical of the wurtzite hexagonal phase of ZnO.Photoluminescence （PL） spectra at room temperature（RT） exhibited an intense ultraviolet emission,without the deep level emission.The position of ultraviolet（UV） emission peak of Zn0.97Mg0.03O showed a blue-shift.Mg doping should be responsible for such a blue-shift.