Eu^(3+)掺杂Bi_2O_3-TeO_2-B_2O_3-ZnO玻璃光谱性质  

The Optical Spectra of Eu^(3+) Doped Bi_2O_3-TeO_2-B_2O_3-ZnO Glasses

作　　者：夏海平[1] 章践立[1] 王金浩[1] 张约品[1] 徐铁峰[1] 聂秋华[1] 

机构地区：[1]宁波大学光电子功能材料重点实验室,宁波315211

出　　处：《光子学报》2006年第1期57-60,共4页Acta Photonica Sinica

基　　金：浙江省自然科学基金(502164);宁波大学校长基金(xk200418)资助

摘　　要：测量了Eu^(3+)(1mol%)掺杂(60-χ)Bi2O3-χTeO2-30B2O3-10ZnO(χ=5,10,20,30,摩尔百分比)玻璃的吸收光谱、发射光谱、激发光谱以及声子边带谱·根据稀土离子Eu^(3+)光学跃起矩阵元的特点,从发射光谱获得了Eu^(3+)光学跃起的J-O参数Ω2与Ω4·结果显示,强度参量Ω2随着Bi_2O_3量的增加与TeO_2量的减少而减小,表明材料的对称性提高,Eu-O键强减弱,共价性减弱·随着Bi_2O_3量的增加,电-声子偶合减弱,材料的热稳定性大幅度提高·The absorption, emission, excitation and phonon-side band spectra of Eu^3＋ doped in 1mol% （60-x） Bi2O3-x TeO2-30B2O3-10ZnO （x = 5, 10, 20, 30, molar percent） were measured. The Ω2 and Ω4 parameters of Eu^3＋ for optical transition were calculated from their emission spectra in terms of reduced matrix U^（t） （λ= 2,4,6） character for optical transitions. The results indicate that the intensity parameters Ω2 decrease as the increase of Bi2O3 and decrease of TeO2 contents. It suggests that the symmetry becomes higher, the bands of Eu and O atoms become weaker and the covalency of Eu and O atoms decreases. In the meantime, the electron-phonon coupling becomes weaker and the thermal stability of the glasses enhance obviously as the increase of Bi2O3 and decrease of TeO3.

关 键 词：光谱 Eu^3+掺杂铋基玻璃 强度参量 声子边带谱 热稳定性 

分 类 号：TB381[一般工业技术—材料科学与工程]