Abstract In this paper, transparent oxyfluoride glass ceramics containing LiYF 4 nanocrystals were successfully synthesized by appropriate heat-treatment on the SiO 2 -Al 2 O 3 -YF 3 -LiF precursor glass. The average diameter of the LiYF 4 nanocrystals is about 16 nm, which has been confirmed by XRD and TEM characterization. Compared with RE 3+ (RE = Tb, Sm)-doped glasses, glass ceramics have shown stronger emission intensities due to most rare earth ions have entered LiYF 4 nanocrystals with lower phonon energy. A combination of blue, green and orange-red emissions has emerged in Tb 3+ /Sm 3+ co-doped glass ceramics, and white light emission could be realized by varying the proportions of Tb 3+ and Sm 3+ under UV light excitation. Furthermore, the concentration quenching effect and the Tb 3+ →Sm 3+ energy transfer process were investigated in this paper. Our results indicate that the Tb 3+ /Sm 3+ co-doped oxyfluoride glass-ceramics containing LiYF 4 nanocrystals show great potential to achieve a white light emission.

中文翻译：

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含有LiYF 4 纳米晶的Tb 3+ /Sm 3+ 共掺杂氟氧化物玻璃陶瓷的结构和光谱特性

摘要 本文通过对SiO 2 -Al 2 O 3 -YF 3 -LiF前驱体玻璃进行适当的热处理，成功合成了含LiYF 4 纳米晶的透明氟氧化物玻璃陶瓷。LiYF 4 纳米晶体的平均直径约为16 nm，这已通过XRD 和TEM 表征得到证实。与RE 3+ (RE = Tb, Sm) 掺杂玻璃相比，由于大多数稀土离子以较低的声子能量进入LiYF 4 纳米晶体，玻璃陶瓷显示出更强的发射强度。Tb 3+ /Sm 3+ 共掺杂微晶玻璃中出现了蓝色、绿色和橙红色发光的组合，在紫外光激发下，通过改变Tb 3+ 和Sm 3+ 的比例可以实现白光发射. 此外，本文研究了浓度猝灭效应和Tb 3+ →Sm 3+ 能量转移过程。我们的结果表明，含有LiYF 4 纳米晶体的Tb 3+ /Sm 3+ 共掺杂氟氧化物玻璃陶瓷显示出实现白光发射的巨大潜力。