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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Red upconversion luminescence (UCL) properties in one-dimensional Yb2Ti2O7: Er nanofibers via an electrospinning route
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Red upconversion luminescence (UCL) properties in one-dimensional Yb2Ti2O7: Er nanofibers via an electrospinning route

机译：一维YB2Ti2O7中的红色上变频（UCL）特性：通过静电纺丝途径纳米纤维

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摘要

The upconversion luminescence (UCL) nanofibers with low dimensional structure have attracted increasing attention in recent years. It is known that oxides based UCL family possesses many merits such as higher stability and lower cost. Consequently, it is of great importance to study the UCL emission in one dimensional structured oxides. Here, we demonstrated that the one-dimension (1D) nanofibers were successfully fabricated via an electrospinning route and the upconversion emissions were realized in cubic pyrochlore Yb2Ti2O7: Er nanofibers. The crystal phase, morphology, crystal structure were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscope. The red color can be observed by the naked eye under 980 nm excitation. We proposed a UCL mechanism based on experiments, which revealed that the green bands corresponding to Er3+ ion transitions H-4(11)/2-I-4(15/2), S-4(3/2)-I-4(15/2) were suppressed, while the red band corresponding to the transition F-4(9/2)-I-4(15/2) became dominant. The enhanced red emission can be ascribed to the resonant energy transfer of Er3+ ions caused by the host Yb3+. This work paved the way for further studies on 1D nanofibers of cubic pyrochlore as well as their UCL applications. (C) 2019 Elsevier B.V. All rights reserved.
机译：低维结构的上转换发光（UCL）纳米纤维已经吸引了越来越多的关注，近年来。据了解，基于氧化物UCL系列具有诸多优点，如更高的稳定性和更低的成本。因此，这是非常重要的研究一个维结构氧化物排放UCL。在这里，我们证明了一维（1D）纳米纤维通过静电纺丝路线成功地制备和上变频排放立方烧绿石Yb2Ti2O7分别实现铒纳米纤维。晶相，形态，晶体结构通过X射线衍射表征，扫描电子显微镜和透射电子显微镜。红色可以通过肉眼下的980nm激发进行观察。我们提出了一种基于实验UCL机制，这表明，对应于铒绿色频带+离子跃迁H-4（11）/ 2-I-4（15/2），S-4（3/2）-I-4 （15/2）被抑制，而对应于F-4（9/2）-I-4（15/2）成为主导的过渡红光波段。增强的红色发射可以归因于引起宿主镱铒离子的共振能量转移。这项工作铺平了道路，进一步研究对立方烧绿石以及他们的UCL应用的一层维的纳米纤维。 （c）2019 Elsevier B.v.保留所有权利。

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