Yb^(3+)/Ho^(3+)共掺碲酸盐玻璃的能量传递和上转换发光  

Energy Transfer and Upconversion Luminescence of Yb^(3+)/Ho^(3+) Co-doped Tellurite Glasses

作　　者：厉旭杰[1] 黄辉[1] 

机构地区：[1]温州大学计算机科学与工程学院,浙江温州325035

出　　处：《激光与红外》2008年第10期1019-1022,共4页Laser & Infrared

基　　金：浙江省自然科学基金项目(No.Y104498)资助

摘　　要：制备了75TeO2-20ZnO-(3-x)La2O3-2Yb2O3-xHo2O3(TZLHx,x=0,0.2,0.4,1,2 mol%),75TeO2-20ZnO-(4.6)La2O3-0.4Ho2O3系列玻璃样品,研究了975nm泵浦下,在Yb3+离子浓度确定的情况下,Ho3+离子浓度的变化对Ho3+上转换发光的影响并分析了上转换发光机制。结果表明,随着Ho3+离子含量的增大,549nm绿光强度先增大而后减小。在TZLH-0.4玻璃中,即含有0.4mol%Ho2O3时,绿光强度达到最大值。而当Ho2O3含量超过0.4mol%时,绿光强度明显降低。基于Yb3+和Ho3+的能级图及上转换机制建立了速率方程,通过数值求解速率方程拟合实验测量寿命曲线,得出了Yb3+与Ho3+之间的能量转移系数CD i(i=2,3,4)。75TeO2- 20ZnO - （3 - x） La2O3 - 2Yb2O3 - xHo2O3 （ TZLH x ,x = 0,0.2,0.4,1,2 mol % ） ,75TeO2 - 20ZnO- （4.6）La203 -0.4Ho203 glasses were prepared. Effect of Ho203 content on upeonversion properties of Ho^3＋/Yb^3＋ co-doped TZLH glasses have been investigated under 975nm excitation, and upeonversion lumineseenee mechanisms were analyzed. The result shows that the upconversion intensity is enhanced largely with increasing Ho2O3 content and has a maximum at O. 4mol% Ho2O3 content and then decreases with an increase in the Ho2O3 content. Rate equations based on energy levels of Yb^3＋ and Ho^3＋ , and upeonversion mechanisms were developed. By calculating the rate equation to fit the measured fluorescence decay, coefficients of the energy transfer rate Cog （i = 2,3,4） between Yb^3＋ and Ho^3＋ were obtained.

关 键 词：碲酸盐玻璃 上转换发光 能量传递 速率方程 

分 类 号：O482[理学—固体物理]