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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >The single-band red upconversion luminescence from morphology and size controllable Er~(3+)/Yb~(3+) doped MnF2 nanostructures
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The single-band red upconversion luminescence from morphology and size controllable Er~(3+)/Yb~(3+) doped MnF2 nanostructures

机译：形态和尺寸可控的Er〜（3 +）/ Yb〜（3+）掺杂MnF2纳米结构的单波段红色上转换发光

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摘要

Er~(3+)/Yb~(3+) doped MnF2 nanostructures have been prepared via a solvothermal method. The morphology of the nanocrystals could be well controlled from nanoparticles to nanoclusters and nanolantems by varying the volume ratio between oleic acid and ethanol in the solvent. Moreover, the size is tuned from 200 ntn to 1.5 μm with the increase of reaction temperature from 110 to 200 °C. It is shown that controlling the doping concentration (Yb~(3+) ≤ 20 mol%) is essential to preserve the single phase and morphology of the MnF2 host. Single-band red upconversion (UC) emission can be generated in Er~(3+) single and Er~(3+)/Yb~(3+) codoped MnF2 nanoclusters due to the energy transfer between host Mn~(2+) and dopant Er~(3+) ions. The detailed studies suggest that our MnF2:Er~(3+)/Yb~(3+) nanocrystals have the strongest single-band luminescence feature at the dopant concentrations of Er~(3+) (2 mol%) and Yb~(3+) (20 mol%). The brighter red emission from the current nanostructure compared with those from NaYF4:Er~(3+)/Yb~(3+) has shown its suitability as an efficient UC luminescence host. It is expected that the achieved intense pure red emission may have potential application in in vivo bioimaging.
机译：通过溶剂热法制备了Er〜（3 +）/ Yb〜（3+）掺杂的MnF2纳米结构。通过改变溶剂中油酸和乙醇之间的体积比，可以很好地控制纳米晶体的形态，从纳米颗粒到纳米团簇和纳米灯笼。而且，随着反应温度从110℃增加到200℃，尺寸从200ntn调节到1.5μm。结果表明，控制掺杂浓度（Yb〜（3+）≤20 mol％）对于保持MnF2主体的单相和形态至关重要。由于主体Mn〜（2+）之间的能量转移，可在Er〜（3+）单晶和Er〜（3 +）/ Yb〜（3+）共掺杂的MnF2纳米团簇中产生单波段红色上转换（UC）发射。和掺杂的Er〜（3+）离子。详细研究表明，我们的MnF2：Er〜（3 +）/ Yb〜（3+）纳米晶体在Er〜（3+）（2 mol％）和Yb〜（ 3+）（20摩尔％）。与NaYF4：Er〜（3 +）/ Yb〜（3+）相比，当前纳米结构的红色发射更亮，表明其适合作为有效的UC发光主体。预期获得的强烈的纯红色发射可能在体内生物成像中具有潜在的应用。

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