Abnormal size-dependent upconversion emissions and multi-color tuning in Er~(3+)-doped CaF_2-YbF_3 disordered solid-solution nanocrystals

Chen D.; Lei L.; Xu J.; Yang A.; Wang Y.

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Abnormal size-dependent upconversion emissions and multi-color tuning in Er~(3+)-doped CaF_2-YbF_3 disordered solid-solution nanocrystals

机译：Er〜（3+）掺杂CaF_2-YbF_3无序固溶纳米晶体中尺寸依赖的上转换发射异常和多色调谐

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A series of Er~(3+)-doped (1 - x)CaF_2-xYbF_3 (0 ≤ x ≤ 0.6) disordered solid-solution nanocrystals with various mean sizes were successfully prepared by a facile solvothermal route. Interestingly, abnormal size-dependent upconversion emissions were demonstrated in these nanocrystals for the first time. With increasing grain size, an obvious enhancement of red to green emission ratio was observed in the Er~(3+) (2 mol%): 0.4CaF_2-0.6YbF_3 nanocrystals, which is the opposite of the routine size-dependent upconversion emission behavior reported previously. Taking Eu~(3+) ions as a structural probe, we investigated the influence of a disordered solid-solution structure on Ln~(3+) luminescence, and proposed that Ln~(3+) clusters formed in the host should play a key role to induce this unusual size-dependent upconversion emission phenomenon. As a consequence, multi-colors such as green, yellow, and red upconversion emissions can be easily realized by appropriately modifying the Yb~(3+) content in the Er~(3+)-doped (1 - x)CaF _2-xYbF_3 nanocrystals. The reported results will deepen the understanding of size effects on the lanthanide upconversion in nanocrystals.

机译：通过简便的溶剂热法成功制备了一系列Er〜（3+）掺杂的（1-x）CaF_2-xYbF_3（0≤x≤0.6）无序固溶纳米晶体。有趣的是，首次在这些纳米晶体中证明了异常的尺寸依赖性上转换发射。随着晶粒尺寸的增大，在Er〜（3+）（2 mol％）：0.4CaF_2-0.6YbF_3纳米晶体中观察到红色与绿色发射比的明显增强，这与常规的尺寸依赖性上转换发射行为相反以前报道过。以Eu〜（3+）离子为结构探针，研究了无序固溶体结构对Ln〜（3+）发光的影响，提出在主体中形成的Ln〜（3+）团簇应发挥引起这种不寻常的尺寸依赖性上转换发射现象的关键作用。结果，通过适当地修改掺有Er〜（3+）的（1-x）CaF _2-中的Yb〜（3+）含量，可以轻松实现绿色，黄色和红色上转换发射等多色。 xYbF_3纳米晶体。报道的结果将加深对纳米晶体中镧系元素上转换的尺寸效应的理解。

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《Nanotechnology》 |2013年第8期|共8页
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Chen D.; Lei L.; Xu J.; Yang A.; Wang Y.;
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1. Abnormal size-dependent upconversion emissions and multi-color tuning in Er~(3+)-doped CaF_2-YbF_3 disordered solid-solution nanocrystals [J] . Chen D., Lei L., Xu J., Nanotechnology . 2013,第8期

机译：Er〜（3+）掺杂CaF_2-YbF_3无序固溶纳米晶体中尺寸依赖的上转换发射异常和多色调谐
2. Energy transfer and upconversion emission of Er~(3+)/Tb~(3+)/Yb~(3+) co-doped transparent glass-ceramics containing Ba_2LaF_7 nanocrystals under heat treatment [J] . Ho Kim Dan, Dacheng Zhou, Rongfei Wang, Optical Materials . 2014,第3期

机译：热处理后含Ba_2LaF_7纳米晶体的Er〜（3 +）/ Tb〜（3 +）/ Yb〜（3+）共掺杂透明玻璃陶瓷的能量转移和上转换发射
3. Multicolor Upconversion Emission and Color Tunability in Tm~(3+)/Er~(3+)/Yb~(3+) Tri-Doped NaNbO3 Nanocrystals [J] . K. Upendra Kumar, N. Vijaya, Jorge Oliva Materials express: an international journal on multidisciplinary materials research . 2012,第4期

机译：Tm〜（3 +）/ Er〜（3 +）/ Yb〜（3+）三掺杂NaNbO3纳米晶体的多色上转换发射和颜色可调性
4. Gd~(3+) and S~(2+) sensitizer effect on the upconversion emission of ZrO_2:Yb~(3+), Er~(3+) nanocrystals prepared by precipitation method with a hydrothermal process [C] . Alejandra Urbina-Frias, Elder De la Rosa, Tzarara Lopez-Luke, Nanophotonic materials VIII . 2011

机译：Gd〜（3+）和S〜（2+）敏化剂对水热沉淀法制备的ZrO_2：Yb〜（3 +），Er〜（3+）纳米晶体上转换发射的影响
5. Surface Plasmon Enhanced Upconversion Luminescence of Yb 3+/ Tm3+ and Yb3+/ Er3+ Systems Doped in NaYF4 on Au Nanopillar Arrays. [D] . Luu, Quoc Anh Nguyen. 2014

机译：金纳米柱阵列上掺入NaYF4的Yb 3 + / Tm3 +和Yb3 + / Er3 +系统的表面等离子体增强上转换发光。
6. The Upconversion Luminescence of Er3+/Yb3+/Nd3+ Triply-Doped β-NaYF4 Nanocrystals under 808-nm Excitation [O] . Lijiao Tian, Zheng Xu, Suling Zhao, 2014

机译：808nm激发下三重掺杂β-NaYF4纳米晶体的Er3 + / Yb3 + / Nd3 +上转换发光
7. Near infrared emission and multicolor tunability of enhanced upconversion emission from Er 3+ –Yb 3+ co-doped Nb 2 O 5 nanocrystals embedded in silica-based nanocomposite and planar waveguides for photonics [O] . Felipe Thomaz Aquino, Jefferson Luis Ferrari, Lauro June Queiroz Maia, 2016

机译：ER 3+ -YB 3+共掺杂Nb 2 O 5纳米晶体从基于二氧化硅的纳米复合材料和平面波导的近红外发射和多色可调节性的近红外发射和多色可调节性和用于光子的平面波导
8. Upconversion Laser Pump Processes in Er(3+):YAlO3 [R] . Scheps, R. 1996

机译：Er（3 +）：YalO3上转换激光泵工艺

Abnormal size-dependent upconversion emissions and multi-color tuning in Er~(3+)-doped CaF_2-YbF_3 disordered solid-solution nanocrystals

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