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首页> 外文期刊>RSC Advances >Tuning the size and upconversion emission of NaYF4:Yb3+/Pr3+ nanoparticles through Yb3+ doping
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Tuning the size and upconversion emission of NaYF4:Yb3+/Pr3+ nanoparticles through Yb3+ doping

机译：通过Yb3 +掺杂调节NaYF4：Yb3 + / Pr3 +纳米粒子的尺寸和上转换发射

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摘要

We introduce a simple method to tune the resulting size as well as the upconversion luminescence of NaYF4:Yb3+/Pr3+ nanoparticles through varying the sensitizer ytterbium concentration. Various amounts of ytterbium from 10-70% were doped into the fluoride nanoparticles, producing a tunable size from 29 to 153 nm. Meanwhile, the blue upconversion luminescence intensity of NaYF4:Yb3+/Pr3+ nanoparticles was monotonously enhanced, reaching a maximum similar to 3.4 fold enhancement at an ytterbium concentration of 70% owing to an improved energy transfer from the ytterbium to the praseodymium ions. Moreover, the luminescence intensity ratio of the blue to the green upconversion was tailored by the composition-dependent cross relaxation process. The result here provides a paradigm for simultaneous control of the physical dimensions as well as the luminescence properties of lanthanide-doped upconversion nanoparticles.
机译：我们介绍了一种简单的方法，可以通过改变敏化剂concentration的浓度来调节所得大小以及NaYF4：Yb3 + / Pr3 +纳米粒子的上转换发光。将10％至70％的各种amounts掺杂到氟化物纳米颗粒中，产生29至153 nm的可调尺寸。同时，NaYF4：Yb3 + / Pr3 +纳米粒子的蓝色上转换发光强度被单调增强，由于70从to离子到energy离子的能量转移得到了改善，在concentration浓度为70％时达到了类似于3.4倍增强的最大值。此外，通过依赖于成分的交叉弛豫过程来定制蓝色与绿色上转换的发光强度比。此处的结果为同时控制掺杂镧系元素的上转换纳米粒子的物理尺寸以及发光特性提供了范例。

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