Single band of red upconverison emission in Ce-based glass ceramics for light manipulation
Single band of red upconverison emission in Ce-based glass ceramics for light manipulation
复制标题
用于光操纵的 Ce 基玻璃陶瓷中的单波段红光上转换发射
DOI：
10.1016/j.jlumin.2020.117527
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发表时间：
2020-11-01
影响因子：
3.6
通讯作者：
Yang, Tao
中科院分区：
文献类型：
--
作者：
Li, Xinyue;Shen, Zheyan;Yang, Tao
本文报道了 CeF3 纳米结构玻璃陶瓷 (GC) 中的单波段红光上转换 (UC) 发射。 CeF3纳米晶（NCs）在铝硅酸盐玻璃基体中原位沉淀，通过淬火熔融法和随后的玻璃结晶制备而成。还进行了结构和光谱表征，以验证 CeF3 NC 的沉淀和掺杂剂的分配。 Ho3+ 和 Er3+ 被精心选择来研究 Ce 基材料中的交叉弛豫 (CR) 过程，因为它们具有梯状能级和与 Ce3+ 相似的能隙。最终，在Er3+掺杂的CeF3 NCs中，明显观察到与Ho(3+)含量无关的单带红色UC发射，而由于能隙的相对不匹配，少量绿色发射仍然顽固地与主要红色发射保持在一起。特别是，这些结果表明 Ce 基材料在调整 UC 发射方面非常重要，这可能是实现光操纵以获得所需发射的重要一步。
Herein, single band of red upconversion (UC) emission in CeF3 nanostructured glass ceramics (GCs) is reported. CeF3 nanocrystals (NCs) were in-situ precipitated in aluminosilicate glass matrix, which was fabricated via quench-melting method and subsequent glass crystallization. Structural and spectrographic characterizations were also performed to verify the precipitation of CeF3 NCs and the partition of dopants. Ho3+ and Er3+ were elaborately selected to examine the cross relaxation (CR) process in Ce-based materials due to their ladder-like energy levels and similar energy gaps with Ce3+. Ultimately, single band of red UC emission was overtly observed independent of Ho(3+ )content, while a bit of green emission still stubbornly remained together with predominate red emission in Er3+ doped CeF3 NCs owing to the relative mismatch of energy gaps. Particularly, these results suggest that Ce-based materials are of importance in tailoring UC emissions, which could be a vital step toward realization of light manipulation for desirable emission.