Near infrared to visible upconversion emission in Er3+/Yb3+ co-doped NaGd(WO4)2 nanoparticles obtained by hydrothermal method
Near infrared to visible upconversion emission in Er3+/Yb3+ co-doped NaGd(WO4)2 nanoparticles obtained by hydrothermal method
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DOI：
10.1016/j.jlumin.2014.04.016
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发表时间：
2014-10
影响因子：
3.6
通讯作者：
Xiaochen Yu;M. Gao;Jingxin Li;L. Duan;N. Cao;Ziqiang Jiang;A. Hao;Peng Zhao;Jibin Fan
中科院分区：
文献类型：
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作者：
Xiaochen Yu;M. Gao;Jingxin Li;L. Duan;N. Cao;Ziqiang Jiang;A. Hao;Peng Zhao;Jibin Fan
通过简单的水热合成过程制备了Er3+/Yb3+共掺杂NaGd(WO4)2纳米粒子。通过 XRD、SEM 和 FT-IR 光谱对产物的晶体结构和形貌进行了表征。这些样品的平均晶粒尺寸取决于退火温度，随着温度的升高而增大。在 975 nm 激发下，可以观察到 Er3+/Yb3+ 共掺杂 NaGd(WO4)2 纳米颗粒的强烈可见光上转换和近红外发光。样品的发光强度取决于纳米粒子的尺寸和Yb3+浓度。上转换发射的跃迁机制可归因于双光子吸收过程。
The Er3+/Yb3+co-doped NaGd(WO4)2nanoparticles have been prepared by a simply hydrothermal synthesis procedure. The crystal structures and morphologies of the products were characterized by XRD, SEM and FT-IR spectroscopy. The average grain size of these samples depended on the annealing temperature, increasing with the increase of the temperature. The intense visible upconversion and near infrared luminescence of the Er3+/Yb3+co-doped NaGd(WO4)2nanoparticles under 975 nm excitation could be observed. The luminescence intensities of the samples depended on the size of the nanoparticles and Yb3+concentration. The transition mechanisms of the upconversion emission can be ascribed to a two-photon absorption process.