ZnO/BaTiO_3纳米复合材料的制备及其发光性质  

Preparation and Photoluminescence Properties of ZnO/BaTiO_3 Nanocomposite System

作　　者：姚礼[1] 杨碚芳[1] 

机构地区：[1]中国科学技术大学中国科学院结构分析开放研究实验室材料科学与工程系,合肥230026

出　　处：《无机材料学报》2003年第2期367-372,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(50172045)

摘　　要：采用溶胶-凝胶技术制备了ZnO/BaTiO3纳米复合材料,用X射线衍射仪(XRD)、透射电子显微镜(TEM)测定了不同温度处理后样品的组成、结构、形貌和尺寸.对复合材料室温下的光致发光谱分析发现,复合材料的发光强度比纯的纳米ZnO发光显著增强;纳米ZnO中氧空位引起的510nm发光带的峰位随着热处理温度的不同而分别出现蓝移和红移现象.其中蓝移主要是量子尺寸效应引起的,而红移则可能与致密化的BaTiO3所提供的高介电场有关.The ZnO/BaTiO3 nanocomposite system was prepared by a sol-gel method., The particle size, structure and phases of the nanocomposite were studied by XRD and TEM. In addition, enhanced photoluminescence of the nanocomposite under 370nm light excitation was observed at room temperature. The blue-green emission peak induced by oxygen vacancies of nano-ZnO particles, has blue-shift or red-shift with different heat-treatment temperatures, the blue-shift is assigned to quantum size effect, and the. red-shift is attributed to the high dielectric environment effects of the BaTiO3 matrix.

关 键 词：ZNO BatTiO3 纳米复合 光致发光 

分 类 号：O482[理学—固体物理]