Er^(3+)离子掺杂氧氟碲酸盐玻璃的上转换发光  

Upconversion Luminescence of Er^(3+)-Doped Oxyfluoride Tellurite Glass

作　　者：孙坚[1] 刘粤惠[1] 杨中民[1] 陈东丹[1] 

机构地区：[1]华南理工大学特种功能材料及其制备新技术教育部重点实验室,广东广州510640

出　　处：《稀有金属材料与工程》2008年第1期76-79,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(60307004和50402007);广东省科技攻关项目(2005A10602001和2004A10602002);广州市科技计划项目(2006Z2-D0161);教育部新世纪人才项目(NCET-04-0821);教育部重点实验室项目(SYSTT2004-04);华南理工大学学生研究计划(SRP)立项项目(B09-Y1060180)

摘　　要：制备了一种新型的单掺铒氧氟碲酸盐玻璃。研究了该玻璃系统的光谱特性,分析了Er3+离子在玻璃中的上转换机理。在室温下,通过980nmLD激发,可观察到明亮的绿色上转换荧光。光谱测试结果表明:在近紫外和蓝光波段,存在中心波长为410,452,490nm的发射峰,分别对应于2H9/2→4I15/2,4F5/2,3/2→4I15/2和4F7/2→4I15/2的跃迁。通过比较980nm可调谐激光器间接激发和488nm氙灯直接激发获得各发光能级的荧光寿命,Er3+离子在氧氟碲酸盐玻璃中的红、绿光上转换发光过程主要源于能量转移过程。In this work, Er^3＋-doped oxyfluoride tellurite glasses have been prepared and their spectral properties have been studied, and the mechanisms of upconversion luminescence have been also investigated. The bright green emission can be observed by naked eye at room temperature under 980 nm diode laser excitation. Three blue luminescence bands centered at 410, 452 and 490 nm corresponding to the ^2H9/2 →^4I15n, ^4F5/2,3/2 →^4I15/2 and ^4F7/2 →^4I15/2 transitions of Er^3＋ can be simultaneously observed. By analyzing the difference of luminescence lifetime between indirect excitation of 980 nm tunable laser and direct excitation of 488 nm xenon lamp, the mechanisms of upconversion luminescence was discussed. It indicates the energy transfer play an important role in Er^3＋-doped oxyfluoride tellurite glasses.

关 键 词：氧氟碲酸盐玻璃 上转换发光 荧光寿命 

分 类 号：TQ171.1[化学工程—玻璃工业]