Persistent luminescence of Eu/Dy-doped Sr 2 MgSi 2 O 7 glass-ceramics processed by aerodynamic levitation - Archive ouverte HAL Access content directly
Journal Articles Journal of the European Ceramic Society Year : 2022

Persistent luminescence of Eu/Dy-doped Sr 2 MgSi 2 O 7 glass-ceramics processed by aerodynamic levitation

Abstract

Glass beads of the Sr 2 MgSi 2 O 7 stoichiometric composition and a non-stoichiometric composition with higher SiO 2 /SrO ratio doped with Eu 2 O 3 /Dy 2 O 3 were prepared through aerodynamic levitation coupled to CO 2 laser heating. The glass beads were subsequently treated at 1100 ºC to produce glass-ceramics with Sr 2 MgSi 2 O 7 : Eu 2+ , Dy 3+ as the main crystalline phase. The doped glasses exhibit red emissions; after crystallisation, the corresponding glass-ceramics emit blue light under UV excitation. The starting glass composition considerably affects the crystallisation process, resulting in Sr 2 MgSi 2 O 7 glass-ceramics with very different microstructures which, in turn, have a significant influence on the luminescence properties. The photoluminescence emission spectra of the glass-ceramics under UV light show a broadband emission (λ= 400-500 nm) with a main peak assigned to the typical Eu 2+ transition under excitation at 365 nm. Both the intensity of the emission and the persistence time significatively increase on decreasing temperature. Glass-ceramics from the non-stoichimetric glass composition co-doped with 1Eu 2 O 3 /0.5Dy 2 O 3 (mol%.) provided the longest persistence times.
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Dates and versions

hal-03874464 , version 1 (28-11-2022)

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L. Fernández-Rodríguez, Mathieu Allix, G. Gorni, A. Canizarès, S. Ory, et al.. Persistent luminescence of Eu/Dy-doped Sr 2 MgSi 2 O 7 glass-ceramics processed by aerodynamic levitation. Journal of the European Ceramic Society, 2022, 42 (16), pp.7596-7608. ⟨10.1016/j.jeurceramsoc.2022.08.062⟩. ⟨hal-03874464⟩
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