中国激光, 2013, 40 (5): 0506001, 网络出版: 2013-05-07   

铈/铽掺杂高钆镥闪烁玻璃能量传递机理

Energy Transfer Mechanisms of Ce3+/Tb3+ Doped Scintillating Glasses with High [Gd(1-x)Lux]2O3 Concentration
作者单位
宁波大学光电子功能材料实验室, 浙江 宁波 315211
摘要
用高温熔融法制备了Ce3+/Tb3+掺杂的高钆镥氟氧化物闪烁玻璃样品,测试分析了其密度、透射光谱、激发与发射光谱、X射线激发发射光谱及衰减曲线等。制备的闪烁玻璃具有高的闪烁光输出,密度大于5.8 g/cm3,闪烁玻璃中Ce3+离子的引入有利于促进Tb3+离子发光。用Inokuti-Hirayama(I-H)理论模型分析了铈/铽掺杂高钆镥闪烁玻璃的能量传递机理,分析结果表明Ce3+→Tb3+的能量传递形式是无辐射共振能量传递。通过拟合数据和理论公式计算出了两者之间能量传递的速率和效率,其能量传递速率PSA和Tb3+离子浓度的平方成正比关系,而能量传递效率η随Tb3+离子浓度增加而升高。
Abstract
The Ce3+/Tb3+ doped oxyfluoride glasses with high Gd[(1-x)Lux]2O3 concentration are prepared by high temperature melting method. The densities, transmission spectra, excitation spectra, emission spectra under ultraviolet (UV) and X-ray excitations and decay curves of Ce3+ ions are measured and analyzed. The scintillating glasses have excellent performance of high light output. The densities of the glasses are greater than 5.8 g/cm3. The Ce3+ ions can sensitize the luminescence of Tb3+ ions. The energy transfer mechanisms of the Ce3+/Tb3+ doped scintillating glasses are analyzed by the I-H theory model. The energy transfer rate and energy transfer efficiency between Ce3+ and Tb3+ ions are calculated by the fitting data and theoretical formula. The results indicate that the energy transfer mechanism is non-radiative energy transfer, the energy transfer rate is proportional to the square of the Tb3+ ions concentration, and energy transfer efficiency increases with the concentration of Tb3+ ions.
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杨斌, 王倩, 夏海平, 王金浩, 张约品. 铈/铽掺杂高钆镥闪烁玻璃能量传递机理[J]. 中国激光, 2013, 40(5): 0506001. Yang Bin, Wang Qian, Xia Haiping, Wang Jinhao, Zhang Yuepin. Energy Transfer Mechanisms of Ce3+/Tb3+ Doped Scintillating Glasses with High [Gd(1-x)Lux]2O3 Concentration[J]. Chinese Journal of Lasers, 2013, 40(5): 0506001.

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