Er3+/Yb3+/Li+/Zn2+: Gd2(MoO4)3 upconverting nanophosphors in optical thermometry

被引：22
作者：
Kumari, Anita [1 ]
Mukhopadhyay, Lakshmi [1 ]
Rai, Vineet Kumar [1 ]
机构：
[1] Indian Sch Mines, Laser & Spect Lab, Dept Appl Phys, Indian Inst Technol, Dhanbad 826004, Jharkhand, India
来源：
JOURNAL OF RARE EARTHS | 2019年 / 37卷 / 03期
关键词：
Upconversion; Phosphors; Dynamic light scattering; Non-lanthanide ions; Optical thermometry; Rare earths; UP-CONVERSION LUMINESCENCE; SOLID-STATE; EMISSION; BEHAVIOR; PHOSPHOR; ER3+; YB3+; ENHANCEMENT; DISPLAY; IONS;
D O I：
10.1016/j.jre.2018.05.021
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Er3+-Yb3+-Li+: Gd-2(MoO4)(3) and Er3+-Yb3+-Zn2+: Gd-2(MoO4)(3) nanophosphors, synthesized by chemical co-precipitation technique were characterized through XRD, FESEM, dynamic light scattering (DLS), diffuse reflectance, photoluminescence, photometric and decay time analysis. The enhancement of about similar to 28, similar to 149 and similar to 351 times in the green upconversion emission band is observed for the optimized Er3+-Yb3+, Er3+-Yb3+-Li+ and Er3+-Yb3+-Zn2+:Gd-2(MoO4)(3) nanophosphors in comparison to the singly Er3+ doped nanophosphors. The electric dipole-dipole interaction is found to be responsible for the concentration quenching. The temperature dependent behaviour of the two green thermally coupled levels of the Er3+ ions based on the fluorescence intensity ratio technique was studied. The maximum sensor sensitivity similar to 38.7 x 10(-3)K(-1) at 473 K for optimized Er3+-Yb3+-Zn2+ codoped Gd-2(MoO4)(3) nanophosphors is reported with maximum population redistribution ability similar to 88% among the H-2(11/2) and S-4(3/2) levels. (C) 2019 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：242 / 247
页数：6
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