局域环境对Tm3+掺杂透明氟氧化物玻璃陶瓷荧光光谱温度特性的影响

通过变温条件下选择激发掺杂发光离子, 在同一样品中实现了不同局域环境下离子荧光的光谱分离. 利用频域及时域的光谱学测量, 研究了镶嵌有纳米晶体的透明玻璃陶瓷体系中掺杂离子的荧光性质和弛豫过程随样品温度和离子局域环境的变化规律, 探讨了局域结构变化对荧光温度特性的影响. 根据样品结构和基质声子分布特点, 分析讨论了荧光衰减过程二阶指数行为. 结果显示, 位于晶相环境中离子的荧光寿命显示较强的温度依赖特性, 而玻璃环境中发光离子的荧光寿命受温度影响较小.

Influence of local environment on the temperature- dependent fluorescence properties of Tm3+-doped transparent oxyfluoride glass ceramics containing LaF3 nanocrystals

Fluorescence from Tm³⁺ ions in crystal and glass phases was separated in one sample through selective excitation at different temperatures. The dependence of sample temperature and local environments on the luminescence of doped ions in transparent oxyfluoride glass ceramics containing LaF3 nanocrystals was investigated by conducting spectroscopic measurements in frequency domain and time domain. The second order decay nature of fluorescence emission was explored. It was found that the temperature dependence of the luminescence emission was affected by the local environment of doped ions. The influence of the environmental temperature on the lifetime was much stronger for the ions in the crystal phase than those in the glass phase.