温度对于掺杂在SrAl12O19中Pr^3＋4f5d发射的影响

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。

不同温度下VUV光激发的Pr^(3+)离子的发光性质

稀土离子的能量较低的能级，即在红外、可见和近紫外区域内的能级结构和跃迁性质，人们已进行了深入研究并建立了完善的理论．但是这些理论是否适用于真空紫外（VUV）区域的较高能级，即4fn组态中的高能级和钞4fn-15d组态，还需要进行很多研究工作。

Temperature-Dependent Emission of Pr^(3+)-Doped LaB_3O_6 under Vacuum Ultraviolet Excitation

The vacuum ultraviolet （VUV） luminescent properties of Pr^3＋ -activated LaB3O6 were investigated with highenergetic synchrotron radiation from 20 to 300 K. In the emission spectra, the parity-forbidden 4f^2→4f^2 and parity-allowed 4f5d→4f^2 transitions were observed simultaneously. In addition, it was also observed that the intensity of 4f5d→4f^2 emission bands increased relative to the intensity of 4f^2→4f^2 emissions with increasing temperature. The thermal equilibrium model of energy levels was employed with respect to the lowest 4f5d state and ^1S0 state of LaB3O6：Pr^3＋ , as a result of which the fitted curve had a good agreement with the experiment values, which clarified the physical nature of temperature-dependent emission characteristics of Pr^3＋ in LaB3O6.

真空紫外光激发下掺Pr^(3+)铝酸盐的自陷激子对Pr^(3+)发光的影响

研究了SrAl12O19:Pr3+和Y3Al5O12(YAG):Pr3+在20K,77K和300K的真空紫外(VUV)光谱,二者除了表现出Pr3+特有的发射性质外,还产生了一种特殊的发射现象,即自陷激子(STE)发射,并且其随着稀土离子浓度和温度的降低而增强.还着重讨论了自陷激子对Pr3+发光的影响.