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Molecules 2018, 23(7), 1768; https://doi.org/10.3390/molecules23071768

Europium-Doped Sol-Gel SiO2-Based Glasses: Effect of the Europium Source and Content, Magnesium Addition and Thermal Treatment on Their Photoluminescence Properties

1
University of Montpellier, ICGM, CMOS, CNRS UMR 5253, 34095 Montpellier Cedex 5, France
2
Université d’Angers, LPhiA, UPRES EA 4464, 49045 Angers Cedex 01, France
3
Université Côte d’Azur, InPhyNi, CNRS UMR 7010, Parc Valrose, 06108 Nice, France
*
Author to whom correspondence should be addressed.
Received: 14 June 2018 / Revised: 14 July 2018 / Accepted: 16 July 2018 / Published: 19 July 2018
(This article belongs to the Special Issue Sol-Gel Chemistry. From Molecule to Functional Materials)
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Abstract

Rare-earth doped silica-based glasses lead the optical materials due to their tailorable spectroscopic and optical properties. In this context, we took advantage of the sol-gel process to prepare various Eu-doped silica glasses to study their luminescent properties before and after annealing at 900 °C. The effect of magnesium on these properties was studied in comparison with Mg-free-glass. Using TEM, nitrogen sorption, XRD and FT-IR, we confirmed that the magnesium modifies the glass structure and the thermal treatment eliminates the aqueous environment, modifying the structure ordering. The emission spectra and the decay time curves show the advantages of the Mg addition and the annealing on the photoluminescent properties. View Full-Text
Keywords: luminescent materials; sol-gel; silica; europium; magnesium; photoluminescence luminescent materials; sol-gel; silica; europium; magnesium; photoluminescence
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Fneich, H.; Gaumer, N.; Chaussedent, S.; Blanc, W.; Mehdi, A. Europium-Doped Sol-Gel SiO2-Based Glasses: Effect of the Europium Source and Content, Magnesium Addition and Thermal Treatment on Their Photoluminescence Properties. Molecules 2018, 23, 1768.

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