【摘要】 测试了不同浓度掺杂下Eu3+离子在硼酸盐玻璃的吸收光谱、激发光谱与发射光谱,根据荧光光谱计算了各样品的强度参数Ω2与Ω4,分析了Eu3+离子掺杂浓度对其发光强度的影响.研究结果表明:在Eu3+离子高掺杂浓度时,会发生浓度猝灭效应,但由于Eu3+激活离子之间能量传递几率很小,使得Eu3+离子猝灭浓度较高。更多还原

【Abstract】 The absorption,excitation and emission spectra were measured with different concentrations of Eu3+-doped in borate glasses.The Ω2 and Ω4 parameters of Eu3+ for optical transition were calculated from their emission spectra in terms of reduced matrix U(t)(t = 2,4,6) character for optical transitions.Degree of dependence of luminescence intensity on concentration of Eu3+ was analyzed.The results indicate that the concentration quenching occur when high level Eu3+ is doped.The critical quenching concentration of Eu3+ is higher than other rare earth ions because the probability of the energy transfer between the corresponding activation ions is very small.更多还原