PDF全文下载：2011040345
聂荣志， 敬承斌*
（青岛科技大学 材料科学与工程学院，山东 青岛 266042）
摘要： 采用溶胶-凝胶法以锗酸根离子水溶液作为前驱体制备了Sn掺杂GeO2粉体样品。用X射线衍射和红外光谱分析了试样的微观结构；用X射线能谱仪测试了试样的组成；用场发射扫描电子显微镜观察了试样的微观形貌；用紫外-可见光光谱分析了试样的禁带宽度。结果表明，Sn掺杂GeO2粉体试样为单一六方GeO2晶相，粒子具有包覆形貌。Sn的掺杂引起了GeO2晶格常数有规律的变化和红外吸收光谱的红移。利用漫散射紫外-可见光光谱计算出GeO2和Sn掺杂GeO2试样的禁带宽度分别为5.04 eV和4.51 eV。荧光光谱显示Sn掺杂GeO2试样具有新的发光性质，发光波长为325 nm。
关键词： 溶胶-凝胶； Sn掺杂GeO2； 红外光谱； 禁带宽度； 光致发光
中图分类号： O 611.62文献标志码： A
Sol-Gel Synthesis of Tin Doped GeO2 Powders
NIE Rong-zhi, JING Cheng-bin
(College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: Sol-Gel Sn-doped GeO2 powders were prepared using GeO2-ammonia aqueous solution as the precursor. The samples were characterized by X-ray diffraction, energy dispersive X-ray spectra, infrared spectra, SEM, UV-vis diffuse reflectance spectra and PL spectra. The results showed that the Sn-doped GeO2 powder sample consists of double-layered particles and has hexagonal crystalline structure. The addition of Sn to GeO2 causes variation of lattices constant and red-shift of infrared absorption spectra. The band gaps of pure GeO2 and Sn-doped GeO2 are estimated to be 5.04 and 4.51 eV, respectively, based on UV-vis diffuse reflectance spectrum analyses. The PL spectra exhibit that Sn-doped GeO2 can emit ultraviolet light at 325 nm.
Key words: Sol-Gel; Sn-doped GeO2; infrared spectrum; band gap; photoluminescence
收稿日期：2010-12-27
基金项目： 国家自然科学基金资助项目（50802046）.
作者简介： 聂荣志（1986—），男，硕士研究生.*通信联系人.
