Monodisperse β-NaYF4:Yb3+,Tm3+ hexagonal microplates with efficient NIR-to-NIR up-conversion emission developed via ion exchange,Journal of Materials Chemistry C

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Monodisperse β-NaYF4:Yb3+,Tm3+ hexagonal microplates with efficient NIR-to-NIR up-conversion emission developed via ion exchange
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2017-08-25 00:00:00 , DOI: 10.1039/c7tc03373g
Shaohua Fan _{1,

2,

3,

4,

5} , Guojun Gao _{6,

7,

8,

9} , Dmitry Busko _{6,

7,

8,

9} , Zhiquan Lin _{1,

2,

3,

4,

5} , Shikai Wang _{1,

2,

3,

4,

5} , Xue Wang _{1,

2,

3,

4,

5} , Shiyu Sun _{1,

2,

3,

4,

5} , Andrey Turshatov _{6,

7,

8,

9} , Bryce S. Richards _{6,

7,

8,

9,

10} , Hongtao Sun _{5,

11,

12,

13,

14} , Lili Hu _{1,

2,

3,

4,

5}

Affiliation

Monodisperse β-NaYF₄:Yb³⁺,Tm³⁺ (NYF) hexagonal microplates with efficient near-infrared (NIR)-to-NIR up-conversion (UC) developed via a new ion-exchange modified hydrothermal method are reported. Ion exchange modification (IEM) not only significantly increases the UC intensity by up to 1000 times and prolongs the emission lifetimes of Tm³⁺ and Yb³⁺, but also enables the monodisperse morphology and size of hexagonal microplates to be maintained. A high UC quantum efficiency (QE) of 3.1% is obtained for IEM β-NaYF₄:20%Yb³⁺,1%Tm³⁺ when excited with 980 nm light at a power density of 10 W cm⁻². The UC emission properties can be finely tailored by changing the NaF/NYF molar ratio (NYF represents lanthanide doped β-NaYF₄) and the doping concentration of Tm³⁺. The two photon NIR UC emission centered at ∼803 nm (arising from Tm³⁺: ³H₄ → ³H₆) dominates the UC emission spectrum and high concentrations of Tm³⁺ favor NIR UC further. A proof-of-concept optical image of printed patterns is demonstrated to verify their applications in security. These results suggest the promising applications of the newly developed monodisperse β-NaYF₄:Yb³⁺,Tm³⁺ hexagonal microplates in security, luminescent labels, solid-state lasers, amplifiers, and biomedicine.

中文翻译：

单分散β-NaYF ₄：镱³⁺，TM ³⁺高效NIR到NIR六边形微孔板上转换发射开发通过离子交换

单分散β-NaYF ₄：镱³⁺，TM ³⁺ -to-NIR上转换（UC）显影（NYF）六边形微孔板具有高效的近红外（NIR）通过一个新的离子交换改性水热法中报告。离子交换改性（IEM）不仅可以将UC强度显着提高多达1000倍，并延长Tm ³⁺和Yb ³⁺的发射寿命，而且还可以保持六角形微孔板的单分散形态和尺寸。对于IEMβ-NaYF得到的3.1％的高UC量子效率（QE）₄ 20％的Yb：³⁺，1％的Tm ³⁺当以10瓦厘米的功率密度与980nm的光激发^-2。该UC发射性能可通过改变的NaF / NYF摩尔比被精细地定制（NYF表示镧系元素掺杂β-NaYF ₄）和Tm的掺杂浓度³⁺。中心在〜803 nm处的两个光子NIR UC发射（从Tm ³⁺：³ H ₄ → ³ H _6引起）主导了UC发射光谱，高浓度的Tm ³⁺进一步有利于NIR UC。演示了印刷图案的概念验证光学图像，以验证其在安全方面的应用。这些结果表明新开发的单分散β-NaYF的承诺应用₄：镱³⁺，TM ³⁺ 安全性，发光标签，固态激光器，放大器和生物医学领域的六角形微孔板。

更新日期：2017-09-14

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