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Transmission electron microscopic and optical spectroscopic studies of Ni2+/Yb3+/Er3+/Tm3+ doped dual‐phase glass‐ceramics
Journal of the American Ceramic Society ( IF 3.9 ) Pub Date : 2018-02-01 , DOI: 10.1111/jace.15452
Zhigang Gao 1 , Xiaosong Lu 1 , Yindong Zhang 1 , Shu Guo 2 , Yinyao Liu 3 , Shiyu Sun 3 , Fei He 4 , Piaoping Yang 4 , Jing Ren 1 , Jun Yang 1
Affiliation  

Ni2+/Yb3+/Er3+/Tm3+ codoped transparent glass‐ceramics (GCs) containing both hexagonal β‐YF3 and spinel‐like γ‐Ga2O3 dual‐phase nanoparticles (NCs) are synthesized by melt‐quenching and subsequent heating procedures. Two techniques of transmission electron microscopy (TEM) nanoanalytics and optical spectroscopy are conjugated to understand the distribution of the rare‐earth ions (REs) and transition metals (TMs) in the nanostructured GCs. It is found that the REs are located predominantly in β‐YF3, whereas the TMs in γ‐Ga2O3 NCs. As a result, energy transfer (ET) between the REs and TMs is considerably suppressed due to the large spatial separation (> 3 nm), but it is enhanced between the REs partitioned in the β‐YF3 NCs. This has important implications for intended and demanding photoluminescence functions. For example, an ultrabroadband near‐infrared (NIR) emission in the wavelength region of 1000‐2000 nm covering the entire telecommunications window is observed for the first time. Meanwhile, intense upconversion (UC) emissions covering the 3 primary colors and locating in the first biological window can be also recorded under excitation by a single pump source at 980 nm.

中文翻译:

Ni2 + / Yb3 + / Er3 + / Tm3 +掺杂的双相玻璃陶瓷的透射电子显微镜和光谱学研究

2+ /镱3+ / ER 3+ / TM 3+共掺透明玻璃-陶瓷(GCS)含有六方β-YF 3和尖晶石状γ -镓2 ö 3双相纳米颗粒(NCS)通过合成熔体淬火和随后的加热程序。结合使用了透射电子显微镜(TEM)纳米分析和光学光谱学这两种技术,以了解纳米结构GC中稀土离子(RE)和过渡金属(TM)的分布。据发现,RE被主要位于β-YF 3,而在的TMγ -镓2 ö 3NCs。其结果是,所述RE和TMS之间的能量转移(ET)被显着地抑制由于大的空间分离(> 3 nm)时,但它是在β-YF分配的RE之间的增强3的NC。这对于预期和要求严格的光致发光功能具有重要意义。例如,首次观察到覆盖整个电信窗口的1000-2000 nm波长范围内的超宽带近红外(NIR)发射。同时,在单个激发源在980 nm的激发下,还可以记录覆盖3种原色并位于第一个生物窗口中的强烈上转换(UC)发射。
更新日期:2018-02-01
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