Luminescence and thermoluminescence of Er3+-doped CaF2 nanomaterials

Er 3+ -doped calcium fluoride (CaF 2 :Er 3+ ) nanoparticles (NPs) have been synthesized by a chemical co-precipitation method. A solution of water ethanol in a 1:1 ratio was used as a solvent. X-ray diffraction and scanning electron microscopy (SEM) results indicated that the fabricated material had...

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Bibliographic Details
Published in:Radiation effects and defects in solids 2023-03, Vol.178 (3-4), p.442-455
Main Authors: Ha, Vu Thi Thai, Do, Thi Anh Thu, Nguyen, Trong Thanh, Ung, Thi Dieu Thuy
Format: Article
Language:English
Subjects:
Beta rays
CaF
Calcium fluoride
Chemical synthesis
co-precipitation
Crystal structure
Emission spectra
Emissions
Ethanol
Grain size
Luminescence
Nanocrystals
Nanomaterials
Nanoparticles
Nanotechnology
Phosphors
Photoluminescence
Radiation dosage
Thermoluminescence
up-conversion
X-ray diffraction
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Summary:Er 3+ -doped calcium fluoride (CaF 2 :Er 3+ ) nanoparticles (NPs) have been synthesized by a chemical co-precipitation method. A solution of water ethanol in a 1:1 ratio was used as a solvent. X-ray diffraction and scanning electron microscopy (SEM) results indicated that the fabricated material had a cubic crystal structure and a characteristic cubic shape of Caionscrystals. The main grain size calculated from Scherer's formula was about 30 nm. The photoluminescence (PL) spectrum of the material showed the specific emissions of Er 3+ ion in the CaF 2 host lattice and the highest emission intensity was obtained at 2 mol% Er 3+ ion. Under a 980 nm laser excitation, the up-conversion luminescence spectra with predominance of red emission were recorded. The thermoluminescence (TL) characteristics of the material were also studied. The obtained CaF 2 :Er 3+ nanocrystals exhibit a high TL sensitivity and linearity to beta (β) radiation doses. The main TL peak is located at 235°C (508 K) and the kinetic parameters corresponding to the trap have been determined by TLAnal software These properties make the phosphor useful for application to estimate exposures of beta rays.
ISSN:1042-0150
1029-4953
DOI:10.1080/10420150.2022.2150972