应用坩埚下降法生长了Pr3+离子掺杂的Na5Lu9F32单晶体.系统地研究了Pr3+掺杂的Na5Lu9F32单晶的吸收光谱、荧光光谱和荧光衰减曲线.应用Judd-Ofelt理论分析计算了其光学强度等参数, 结果表明Pr3+离子处于Pr-F强共价键的高对称环境中.在440 nm光的激发下观察到以482、523和605 nm为中心的尖锐的强荧光发射带.研究了Pr3+掺杂浓度对上述发光强度的影响规律, 实验发现当Pr3+掺杂浓度达到~0.5 mol%时, 其荧光发射强度达到最大.分析了环境温度从298 K到443 K变化时对荧光强度的影响, 随着温度的增加, 荧光强度逐步变弱, 且其523 nm的绿光受温度影响要小于482 nm的蓝光和605 nm的红光.

The growth of Pr3+ doped Na5Lu9F32 single crystals by Bridgman method was reported. The absorption spectra, fluorescence spectra, and fluorescence decay curves of Pr3+-doped Na5Lu9F32 single crystals were studied systematically. Judd-Ofelt analysis performed on the obtained crystal reveals that the Pr3+ ions are exposed to a high symmetric environment with strong degree covalency of Pr-F bond. The sharp and strong emission bands centered at 482, 523 and 605 nm were observed under the excitation of 440 nm light. The maximum emission intensity was obtained when the concentration of Pr3+ reached to～0.5 mol%. Temperature dependent measurement suggests that the green emission is less affected by temperature than the blue and red emission.