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首页> 外文期刊>Nanotechnology >Controllable morphology and high photoluminescence of (Y, Gd)(V, P) O _4:Eu~(3+) nanophosphors synthesized by two-step reactions
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Controllable morphology and high photoluminescence of (Y, Gd)(V, P) O _4:Eu~(3+) nanophosphors synthesized by two-step reactions

机译：通过两步反应合成的（Y，Gd）（V，P）O _4：Eu〜（3+）纳米磷光体的可控形态和高光致发光

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摘要

Multi-ion doped YVO_4:Eu~(3 +) nanophosphors with high photoluminescence intensity were successfully prepared by a two-step reaction process for the first time, including YVO_4:Eu~(3 +) seeds synthesized by hydrothermal reaction and co-doping P~(5 +) and Gd ~(3 +) in a sol-gel process. X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and photoluminescence spectroscopy were adopted to detect the structure, grain size, morphology and optical properties of the nanophosphors, respectively. Owning to the template-induced effect of the seeds, the morphology and size of the nanophosphors could be controlled by adjusting the molar ratios between the seeds and doping ions. The size of these nanophosphors increased as P~(5 +) and Gd~(3 +) co-doped. However, most of the samples kept approximately spherical morphology and narrow size distribution. The composition-optimized (Y, Gd)(V, P)O _4:Eu~(3 +) nanophosphors with spherical morphology in the 80-100nm range exhibit better red emission and superior color saturation under vacuum ultraviolet excitation compared with that of the commercial phosphor (Y, Gd)BO_3:Eu~(3 +).
机译：首次通过两步反应成功制备了具有高光致发光强度的多离子掺杂YVO_4：Eu〜（3 +）纳米磷光体，包括水热反应和共掺杂合成的YVO_4：Eu〜（3 +）晶种。溶胶-凝胶过程中的P〜（5 +）和Gd〜（3 +）。采用X射线衍射，透射电子显微镜，扫描电子显微镜和光致发光光谱分别检测纳米磷光体的结构，晶粒尺寸，形貌和光学性能。归因于种子的模板诱导作用，可以通过调节种子与掺杂离子之间的摩尔比来控制纳米磷光体的形态和尺寸。这些纳米磷光体的尺寸随着P〜（5 +）和Gd〜（3 +）的共掺杂而增加。然而，大多数样品保持近似球形的形态和狭窄的尺寸分布。在80-100nm范围内具有球形形态的经成分优化的（Y，Gd）（V，P）O _4：Eu〜（3 +）纳米磷光体在真空紫外激发下具有更好的红色发射和出色的色彩饱和度。商用荧光粉（Y，Gd）BO_3：Eu〜（3 +）。

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