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Er3+/Yb3+掺杂铌酸钆纳米晶的上转换发光

发表时间:2009-11-30  浏览量:1329  下载量:636
全部作者: 潘跃晓
作者单位: 华南理工大学化学与化工学院
摘 要: 采用燃烧法合成Er3+/Yb3+掺杂铌酸盐GdNbO4上转换发光纳米晶,用X射线衍射(X-ray diffraction, XRD)表征了其物相,透射电子显微镜(transmission electron microscopy, TEM)显示其颗粒大小约为60 nm. 研究了其在氙灯激发下的正常发光及其在980 nm激光泵浦下的上转换发光。Er3+与Yb3+的最佳掺杂摩尔浓度分别为Gd3+离子的5%~7%与10%~20%.从其上转换发光强度随激光功率的变化关系可见,Er3+在铌酸盐GdNbO4纳米晶中的上转换发光属于双光子激发态吸收发光。
关 键 词: 无机化学;稀土离子;铌酸盐;纳米晶;上转换发光
Title: Upconversion luminescence of Er3+ and Yb3+ codoped GdNbO4 nanocrystals
Author: PAN Yuexiao
Organization: School of Chemistry and Chemical Engineering, South China University of Technology
Abstract: Er3+/Yb3+ co-doped monoclinic GdNbO4 nanocrystals have been synthesized by a combustion method. The crystal structure and microscopic shape were explored by X-ray diffraction (XRD) and transmission electron microscopy (TEM) respectively. The GdNbO4 nanocrystals obtained by combustion method showed uniform particles with size about 60 nm. The upconversion luminescence and infrared emission spectra were investigated. The optimum concentration of Er3+ and Yb3+ are 5%~7% (in mol ratio) and 10%~20% (in mol ratio) respectively. The dependence of the upconversion luminescence intensity on pump power confirmed that the upconversion luminescence in Er3+/Yb3+ co-doped monoclinic GdNbO4 nanocrystals was produced by two-photon excited-state absorption process.
Key words: inorganic chemistry; rare earth ions; niobates; nanocrytals; upconversion luminescence
发表期数: 2009年11月第22期
引用格式: 潘跃晓. Er3+/Yb3+掺杂铌酸钆纳米晶的上转换发光[J]. 中国科技论文在线精品论文,2009,2(22):2431-2434.
 
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