Simultaneous morphology manipulation, upconversion luminescence enhancement and the photoelectric effect of NaGd0.78-x ZrxF4:Yb3 /Er3 nanophosphors
Simultaneous morphology manipulation, upconversion luminescence enhancement and the photoelectric effect of NaGd0.78-x ZrxF4:Yb3 /Er3 nanophosphors
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NaGd0.78-x ZrxF4:Yb3 /Er3 纳米荧光粉的同时形貌操控、上转换发光增强和光电效应
DOI：
10.1016/j.jlumin.2018.11.047
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发表时间：
2019
影响因子：
3.6
通讯作者：
Yuan Zhuobin
中科院分区：
文献类型：
--
作者：
Zhang Yuanyuan;Li Yue;Zhang Jun;Guo Wei;Zhang Shusheng;Su Haiquan;Li Xiangjun;Yuan Zhuobin
在乙二胺四乙酸(EDTA)的辅助下，首次用水热法合成了NaGdF4：Yb3+/Er3+/Zr4+六方荧光纳米晶。本文通过X射线粉末衍射分析、透射电子显微镜和场发射扫描电子显微镜的观察，通过随时间变化的实验，系统地研究和讨论了不同相和形貌的NaGdF4样品可能的形成过程。研究发现，NaGdF4的内部结构和外部因素的反应时间都对最终样品的形状演化起着至关重要的作用。此外，β-NaGdF_4：Yb~(3+)/Er~(3+)/Zr~(4+)纳米复合材料的光致发光光谱证实了荧光强度的增强。根据荧光结果，在掺杂6%的Zr4+时，由于掺杂导致Er3+周围环境的不对称，导致绿光和红光发射强度最大。此外，还利用原子力显微镜(AFM)和电化学工作站对其光电性能进行了表征。与传统的上转换(UC)材料相比，这种兼具发光和光电性能的新型NaGdF4纳米粒子有望在光电或光伏传感器等领域获得广泛的应用。
Fluorescent NaGdF4:Yb3+/Er3+/Zr4+hexagonal nanoprisms are synthesized for the first time through a facile hydrothermal route with the assistance of ethylene diamine tetraacetic acid (EDTA). The possible formation process for the obtained NaGdF4samples with various phases and morphologies is investigated and discussed systematically through time-dependent experiments with the help of X-ray power diffraction (XRD) analysis, transmission electron microscopy (TEM) and field emission-scanning electron microscopy (FE-SEM) observations in this article. It is found that the intrinsic structure of NaGdF4and external factor reaction time all play a vital role in the shape evolution of the ultimate samples. Furthermore, the photoluminescence (PL) spectra of β-NaGdF4:Yb3+/Er3+/Zr4+nanocomposites confirm the enhancement of fluorescence intensity. According to the fluorescent results, in the case of 6% Zr4+doping, the green and red emissions reach the highest intensities because of the asymmetrical environment around Er3+causing by the doping of Zr4+. In addition, atomic force microscope (AFM) and electrochemical workstation are used to characterize the photoelectric property. This novel NaGdF4nanoparticle with both luminescent and photoelectric property promises to have comprehensive applications in many fields, such as photoelectric or photovoltaic sensors, when compared with conventional up-conversion (UC) materials.