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Issue 20, 2020
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Lanthanide-doped bismuth-based fluoride nanoparticles: controlled synthesis and ratiometric temperature sensing

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Abstract

Bismuth-based nanoparticles, particularly NaBiF4, have attracted extensive attention as hosts for lanthanides (Ln3+) ions and other luminescent ions in recent years. However, the controllable synthesis of NaBiF4 nanoparticles remains a challenge. Herein, different concentrations of Gd3+ ion-doped NaBiF4:Yb3+/Er3+ upconversion nanoparticles (UCNPs) have been successfully synthesized via a facile solvothermal method. By changing the doping levels of Gd3+ ions (0–20%), the size of NaBiF4:Yb3+/Er3+ UCNPs can be easily tuned from 200 nm to 50 nm, but the nanoparticles always maintained the hexagonal phase structure. Under 980 nm excitation, the as-synthesized NaBiF4:Yb3+/Er3+/20%Gd3+ UCNPs showed desirable luminescent properties. Furthermore, the 980 nm excited luminescence temperature-sensing behavior of NaBiF4:Yb3+/Er3+/20%Gd3+ UCNPs was achieved in a wide temperature range from 148 K to 498 K. These results provide strong evidence for the controllable synthesis of NaBiF4 UCNPs and their application in ratiometric temperature sensing.

Graphical abstract: Lanthanide-doped bismuth-based fluoride nanoparticles: controlled synthesis and ratiometric temperature sensing

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Supplementary files

Article information


Submitted
22 Mar 2020
Accepted
30 Apr 2020
First published
04 May 2020

CrystEngComm, 2020,22, 3432-3438
Article type
Paper

Lanthanide-doped bismuth-based fluoride nanoparticles: controlled synthesis and ratiometric temperature sensing

P. Lei, R. An, C. Li, J. Feng and H. Zhang, CrystEngComm, 2020, 22, 3432
DOI: 10.1039/D0CE00435A

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