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首页> 美国卫生研究院文献>Nanomaterials >Non-Linear Optical Properties of Er3+–Yb3+-Doped NaGdF4 Nanostructured Glass–Ceramics
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Non-Linear Optical Properties of Er3+–Yb3+-Doped NaGdF4 Nanostructured Glass–Ceramics

机译：ER3 + -YB3 + - 掺杂NAGDF4纳米结构玻璃陶瓷的非线性光学性能

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Transparent oxyfluoride glass–ceramics containing NaGdF nanocrystals were prepared by melt-quenching and doped with Er (0.5 mol%) and different amounts of Yb (0–2 mol%). The selected dopant concentration the crystallization thermal treatments were chosen to obtain the most efficient visible up-conversion emissions, together with near infrared emissions. The crystal size increased with dopant content and treatment time. NaGdF NCs with a size ranging 9–30 nm were obtained after heat treatments at T + 20–80 °C as confirmed by X-ray diffraction and high-resolution transmission electron microscopy. Energy dispersive X-ray analysis shows the incorporation of rare earth ions into the NaGdF nanocrystals. Near-infrared emission spectra, together with the up-conversion emissions were measured. The optical characterization of the glass–ceramics clearly shows that Er and Yb ions are incorporated in the crystalline phase. Moreover, visible up-conversion emissions could be tuned by controlling the nanocrystals size through appropriated heat treatment, making possible a correlation between structural and optical properties.
机译：通过熔融淬火并掺杂掺杂ER（0.5mol％）和不同量的Yb（0-2摩尔％）制备含有NagdF纳米晶体的透明氧化物玻璃陶瓷。选择结晶热处理的所选掺杂剂浓度，以获得最有效的可见光转换排放，以及近红外排放。晶体尺寸随掺杂剂含量和治疗时间而增加。通过X射线衍射和高分辨率透射电子显微镜确认，在热处理后获得具有9-30nm的尺寸9-30nm的Nagdf NC。能量分散X射线分析显示稀土离子掺入NagdF纳米晶体中。测量近红外发射光谱与上转换排放一起。玻璃陶瓷的光学表征清楚地表明ER和YB离子掺入结晶相中。此外，通过通过适当的热处理控制纳米晶体大小，可以通过控制纳米晶体尺寸来调谐可见的上转换排放，使得结构和光学性质之间的相关性。

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