【摘要】 测量了在真空紫外光激发下,SrAl12O19∶Pr3+在不同温度(308~483 K)时的发射光谱,同时观测到了电偶极禁戒的4f2→4f2和电偶极允许的4f5d→4f2跃迁。随温度升高,4f5d→4f2与1S0发射的相对强度逐渐增强。运用Pr3+4f2组态最高的能级—1S0能级和4f5d组态最低能级间的热平衡模型成功解释了SrAl12O19∶Pr3+发射光谱随温度变化的现象。更多还原

【Abstract】 The emission spectra of SrAl12O19∶Pr3+ at temperature from 308 to 483 K were investigated under vacuum ultraviolet excitation.Both the dipole-forbidden 4f2→4f2 transition and the dipole-allowed 4f5d→4f2 transitions were observed.The intensity of the 4f5d→4f2 emission relative to that of the 4f2→4f2 emission increased with increasing temperature.A thermal equilibrium model was applied to the system consisting of the 1S0 state and the lowest 4f5d states of Pr3+,and the temperature dependence of emission spectra of Pr3+ in the Pr3+-doped SrAl12O19 was well explained.更多还原