Hydrothermal Synthesis and Up-Conversion Properties of Yb3+ Co-doped La2Sn2O7:Er3+ Crystals

被引：0
|
作者：
Huang Y. [1 ]
Li J. [1 ]
Li H. [1 ]
Li L. [1 ]
Chen X. [1 ]
Yang J. [1 ]
机构：
[1] School of Chemistry and Materials Science, Guizhou Normal University, Key Lab for Functional Materials Chemistry of Guizhou Province, Guiyang
来源：
Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2019年 / 37卷 / 04期
关键词：
Hydrothermal method; La[!sub]2[!/sub]Sn[!sub]2[!/sub]O[!sub]7[!/sub]:Er[!sup]3+[!/sup]/Yb[!sup]3+[!/sup]co-doped; Two-photon emission; Up-conversion properties;
D O I：
10.11785/S1000-4343.20190404
中图分类号：
学科分类号：
摘要：
Yb3+ co-doped La2Sn2O7: Er3+ crystals were successfully synthesized by hydrothermal method. The influence of the Yb3+ doping content and the pH of the reaction system on the phase structures, morphologies, and optical properties of the as-synthesized Yb3+ co-doped La2Sn2O7:Er3+ crystals are characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM), Fourier infrared spectrum (FT-IR), Ultraviolet visible diffuse reflection spectrum (UV-Vis) and up-conversion luminescence spectroscopy (UPL). The results showed that the Yb3+doping amount and the pH markedly affected the structure and the up-conversion emission properties of the samples, respectively. The single phase La2Sn2O7 crystals with pyrochlore structure were prepared at pH 13. The results showed that the Yb3+ co-doped La2Sn2O7: 7%Er3+samples emitted the up-conversion emission peaks of Er3+ at 529, 550 and 665 nm, respectively, under 980 nm near infrared light excitation. The possible up-conversion emission mechanism of the Yb3+ co-doped La2Sn2O7: 7%Er3+ samples was briefly proposed. The emission mechanism for the emission at 529 nm was found to be two-photon absorption-emission. Furthermore, the concentration quenching was observed when the Yb3+doping amount was over 14%. © 2019, Editorial Office of Journal of the Chinese Society of Rare Earths. All right reserved.
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页码：418 / 425
页数：7
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