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Formation Mechanism, Structural, and Upconversion Properties of Alkaline Rare-Earth Fluoride Nanocrystals Doped With Yb3+/Er3+ Ions
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2018-05-14 00:00:00 , DOI: 10.1021/acs.inorgchem.8b00484 Tomasz Grzyb 1 , Dominika Przybylska 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2018-05-14 00:00:00 , DOI: 10.1021/acs.inorgchem.8b00484 Tomasz Grzyb 1 , Dominika Przybylska 1
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Ultrasmall (9–30 nm) Yb3+/Er3+-doped, upconverting alkaline rare-earth fluorides that are promising for future applications were synthesized by the microwave-assisted hydrothermal method. The formation mechanism was proposed, indicating the influence of the stability of metal ions complexes with ethylenediaminetetraacetic acid on the composition of the product and tendency to form M2REF7 (M0.67RE0.33F2.33) cubic compounds in the M–RE–F systems. Their physicochemical properties (structure, morphology, and spectroscopic properties) are compared and discussed. The obtained nanoparticles exhibited emission of light in the visible spectra under excitation by 976 nm laser radiation. Excitation and emission spectra, luminescence decays, laser energy dependencies, and upconversion quantum yields were measured to determine the spectroscopic properties of prepared materials. The Yb3+/Er3+ pair of ions used as dopants was responsible for an intense yellowish-green emission. The upconversion quantum yields determined for the first time for M2REF7-based materials were 0.0192 ± 0.001% and 0.0176 ± 0.001% for Sr2LuF7:Yb3+,Er3+ and Ba2LuF7:Yb3+,Er3+ respectively, the two best emitting samples. These results indicated the prepared materials are good and promising alternatives for the most studied NaYF4:Yb3+,Er3+ nanoparticles.
中文翻译：
掺Yb 3+ / Er 3+离子的稀土稀土氟化物纳米晶体的形成机理，结构和上转换特性
通过微波辅助水热法合成了掺有超小型（9–30 nm）Yb 3+ / Er 3+的上转换碱金属稀土氟化物，这些氟化物有望用于未来的应用。提出了形成机理，表明金属离子与乙二胺四乙酸配合物的稳定性对产物组成的影响以及形成M 2 REF 7的趋势（M 0.67 RE 0.33 F 2.33）在M–RE–F系统中的立方化合物。比较并讨论了它们的理化性质（结构，形态和光谱性质）。所获得的纳米颗粒在976nm激光辐射的激发下表现出可见光谱中的光发射。测量激发和发射光谱，发光衰减，激光能量依赖性和上转换量子产率，以确定所制备材料的光谱性质。用作掺杂剂的一对Yb 3+ / Er 3+离子引起强烈的黄绿色发射。首次确定的基于M 2 REF 7的材料的上转换量子产率为0.0192±0.001％和Sr 2 LuF为0.0176±0.001％7：Yb 3+，Er 3+和Ba 2 LuF 7：Yb 3+，Er 3+，是两个发射最佳的样品。这些结果表明，所制备的材料是研究最多的NaYF 4：Yb 3+，Er 3+纳米颗粒的良好且有前途的替代物。
更新日期：2018-05-14
中文翻译：
掺Yb 3+ / Er 3+离子的稀土稀土氟化物纳米晶体的形成机理，结构和上转换特性
通过微波辅助水热法合成了掺有超小型（9–30 nm）Yb 3+ / Er 3+的上转换碱金属稀土氟化物，这些氟化物有望用于未来的应用。提出了形成机理，表明金属离子与乙二胺四乙酸配合物的稳定性对产物组成的影响以及形成M 2 REF 7的趋势（M 0.67 RE 0.33 F 2.33）在M–RE–F系统中的立方化合物。比较并讨论了它们的理化性质（结构，形态和光谱性质）。所获得的纳米颗粒在976nm激光辐射的激发下表现出可见光谱中的光发射。测量激发和发射光谱，发光衰减，激光能量依赖性和上转换量子产率，以确定所制备材料的光谱性质。用作掺杂剂的一对Yb 3+ / Er 3+离子引起强烈的黄绿色发射。首次确定的基于M 2 REF 7的材料的上转换量子产率为0.0192±0.001％和Sr 2 LuF为0.0176±0.001％7：Yb 3+，Er 3+和Ba 2 LuF 7：Yb 3+，Er 3+，是两个发射最佳的样品。这些结果表明，所制备的材料是研究最多的NaYF 4：Yb 3+，Er 3+纳米颗粒的良好且有前途的替代物。
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