Er^(3+)离子掺杂透明的LaF_3-SiO_2纳米玻璃-陶瓷的上转换发光  

Upconversion luminescence of a transparent nanometer structure based Er^(3+) ion doped LaF_3-SiO_2 glass-ceramics

作　　者：佟鹏[1] 赵谡玲[1] 徐征[1] 徐叙瑢[1] 

机构地区：[1]北京交通大学发光与光信息技术教育部重点实验室,北京100044

出　　处：《功能材料》2008年第4期533-535,539,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(60678006;60576016);北京市自然科学基金资助项目(2073030)

摘　　要：采用溶胶-凝胶法成功制备了一系列Er3+掺杂的透明纳米LaF3-SiO2玻璃-陶瓷样品,并研究了其上转换发光性质与发光机制。研究得到了Er3+浓度对上转换发光的影响规律,拟合了上转换荧光强度与LD工作电流的关系,发现所得结果与理论值能够很好地一致。在980nm激光二极管激发下,获得了发射波长为520、540、660nm的有效上转换发光。在较低的功率泵浦下,540nm波长的绿光波段发射最强,其发光主要过程是处于4F7/2态的Er3+离子能量大部分被弛豫到4S3/2态,再由此激发态跃迁到基态4I15/2态所致。A series of transparent nanometer structure based Er^3＋ doped LaF3-SiO2 glass-ceramics samples were prepared by sol-gel method, and the up-conversion luminescence properties and its mechanism was studied. Effect of Er^3＋ concentration on up-conversion luminescence was attained by fitting the relation dependence of upconversion luminescence intensity on LD electric work current, we found that the dates are primely consistent with that of theoretical account. Under laser diode excitation with 980nm emission, the efficient upconversion luminescence at 520,540 and 660nm were were observed respectively. And under pumping of a lower power, 540nm green emission behaviors is the largest,its main luminescence process is as follows. The Er^3＋ energy at 4F7/2 excited state was relaxed a large of part to 4S3/2 state,and then electron transition from ^4S3/2 to ^4I15/2 state.

关 键 词：纳米晶 上转换发光 玻璃-陶瓷 溶胶-凝胶法 

分 类 号：TQ171.73[化学工程—玻璃工业] O482.3[化学工程—硅酸盐工业]