Zhang Xiang-Yu, Li Lin, Gao Dang-Li, Zheng Hai-Rong
School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2009 Oct;29(10):2738-42.
Fluorescence emission spectra from Tm3+ in crystal phase and glass phase were separated under selective excitation of 1D2 level in Tm3+ doped transparent oxyfluoride glass ceramics containing LaF3 nanocrystals. Emissions from the crystal phase and from the glass phase were detected. The influence of the interaction between glass matrix and nanocrystals on the optical characteristics of Tm3+ ions in the two different local environments was investigated. The results indicate that the increase in nanocrystal size results in a decrease in the impact of oxides glass on Tm3+ in the crystal phase, and an enhancement of the impact of nanocrystals on Tm3+ in the glass phase. For smaller nanoparticles, the emission efficiency of Tm3+ ions in the crystal phase was reduced, and the influence of nanocrystals on the ions in the glass phase was reduced too. The larger the nanocrystal size, the weaker the influence of oxide glass on the Tm3+ ions in the crystal phase, and the better performance of fluorescence emission. It was also found that the content of SiO2 in glass matrix could affect the emission efficiency of Tm3+ in both environments.
在含有LaF₃纳米晶体的掺Tm³⁺透明氟氧化物玻璃陶瓷中，在1D₂能级的选择性激发下，分离出了晶体相和玻璃相中Tm³⁺的荧光发射光谱。检测了晶体相和玻璃相的发射。研究了玻璃基质与纳米晶体之间的相互作用对两种不同局部环境中Tm³⁺离子光学特性的影响。结果表明，纳米晶体尺寸的增加导致氧化物玻璃对晶体相中Tm³⁺的影响减小，而纳米晶体对玻璃相中Tm³⁺的影响增强。对于较小的纳米颗粒，晶体相中Tm³⁺离子的发射效率降低，纳米晶体对玻璃相中离子的影响也降低。纳米晶体尺寸越大，氧化物玻璃对晶体相中Tm³⁺离子的影响越弱，荧光发射性能越好。还发现玻璃基质中SiO₂的含量会影响两种环境中Tm³⁺的发射效率。
