在硅磷酸镧中Ce^(3+)离子对Tb^(3+)离子的敏化

The Sensitization of Tb3+ Luminescence by Ce^(3+) in Lanthanum Silicophosphates

实验表明在La_2O_3·0.01 SiO_2·0.95 P_2O_5基质中Ce^(3+)对Tb^(3+)有强的敏化作用。研究了在254nm紫外光激发下温度对Tb^(3+)激活和Ce^(3+K)、Tb^(3+)共激活试样的发射强度的影响及Ce^(3+)、Tb^(3+)共激活的试样Tb^(3+)的~5D_4→~7F_(6:5:4)跃迁的发射强度随温度的变化。计算了Ce^(3+)到Tb^(3+)的能量传递效率。初步探讨了Ce对Tb的能量传递机理。

; We studied the emission and excitation spectra of Tb3+-activated as and Ce3+ and Tb3+-coactivated La2O3-0.01 SiO2-0.95 P2O5. Though the comparison between emission and excitation spectra, we have found that luminescence of Tb3+ is greatly sensitized and enhanced in the presence of Ce3 + .The effect of temperature on the luminescence of Tb3+- activated as well as Ce3 + and Tb3 + - coactivated phosphorus was studied.The energy transfer efficiency from Ce3+ to Tb3+ was calculated to be more than 95%. The mechanism of energy transfer from Ce3+ to Tb3+ has been shown to be a resonance process.The phosphorus shows different concentration quenching conditions under various types of excitation. The higher the excitation energy, the smaller the concentration at which the quenching starts to occur. The optimum concentration for Tb3+ emission under different excitations was determined.