Green upconversion luminescence of Er3+ and Yb3+ codoped Gd2Mo4O15 for optical temperature sensing

doi:10.1016/j.jallcom.2021.162516

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	Green upconversion luminescence of Er3+ and Yb3+ codoped Gd2Mo4O15 for optical temperature sensing
	Q. R. Wang; H. Wu; L. L. Zhang; H. J. Wu; Y. S. Luo; G. H. Pan; Z. D. Hao; Q. Q. Mu and J. H. Zhang
	2022
Source Publication	Journal of Alloys and Compounds
ISSN	0925-8388
Volume	895 Pages:7
Abstract	Er3+ and Yb3+ codoped Gd2Mo4O15 upconversion (UC) phosphors are synthesized by high temperature solid state reaction. The crystalline phase and morphology are studied in detail by X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscopy (SEM). Under 980 nm laser excitation, the phosphors show a significant green UC luminescence contributed from H-2(11/2)/S-4(3/2) -> I-4(15/2) transitions of Er3+, while the popular red F-4(9/2) -> I-4(15/2) emission is quite weak. The temporal evolutions of Er3+ and Yb3+ emissions after 980 nm pulse excitation are studied as a function of Er3+ and Yb3+ concentrations. It is revealed that the weak red UC emission is due to its low emission efficiency in Gd2Mo4O15 that has a high cutoff phonon energy of 960 cm(-1). The temperature sensing behaviors based on the thermally coupled H-2(11/2) and S-4(3/2) levels have been explored. A high absolute sensitivity of 0.00853 K-1 at 554 K is achieved and an excellent thermal durability is observed. The relative absorptance of I-4(15/2) -> H-2(11/2) transition to the I-4(15/2) -> S-4(3/2) transition is proposed as a good measure for evaluating the absolute sensitivity based on the comparative study of some familiar materials. Our results imply that Gd2Mo4O15 is a promising green UC phosphor for optical thermometry. (C) 2021 Elsevier B.V. All rights reserved.
DOI	10.1016/j.jallcom.2021.162516
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Indexed By	SCI
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Document Type	期刊论文
Identifier	http://ir.ciomp.ac.cn/handle/181722/65279
Collection	中国科学院长春光学精密机械与物理研究所
Recommended Citation GB/T 7714	Q. R. Wang,H. Wu,L. L. Zhang,et al. Green upconversion luminescence of Er3+ and Yb3+ codoped Gd2Mo4O15 for optical temperature sensing[J]. Journal of Alloys and Compounds,2022,895:7.
APA	Q. R. Wang.,H. Wu.,L. L. Zhang.,H. J. Wu.,Y. S. Luo.,...&Q. Q. Mu and J. H. Zhang.(2022).Green upconversion luminescence of Er3+ and Yb3+ codoped Gd2Mo4O15 for optical temperature sensing.Journal of Alloys and Compounds,895,7.
MLA	Q. R. Wang,et al."Green upconversion luminescence of Er3+ and Yb3+ codoped Gd2Mo4O15 for optical temperature sensing".Journal of Alloys and Compounds 895(2022):7.

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