Eu3+掺杂Bi2O3-TeO2-B2O3-ZnO玻璃光谱性质

测量了Eu3+（1 mol%）掺杂(60-χ)Bi2O3-χ TeO2-30B2O3-10ZnO（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Eu3+光学跃起矩阵元的特点，从发射光谱获得了Eu3+光学跃起的J-O参数Ω2与Ω4.结果显示,强度参量Ω2随着Bi2O3量的增加与TeO2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Bi2O3量的增加，电－声子偶合减弱,材料的热稳定性大幅度提高.

The Optical Spectra of Eu3+ Doped Bi2O3-TeO2-B2O3-ZnO Glasses

The absorption,emission,excitation and phonon-side band spectra of Eu3+ doped in 1mol(60-χ)Bi2O3-χTeO2-30B2O3-10ZnO(χ=5,10,20,30,molar percent) were measured. The Ω2 and Ω4 parameters of Eu3+ 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 TeO2.