Near-infrared rechargeable glass-based composites for green persistent luminescence

Near-infrared rechargeable glass-based composites for green persistent luminescence

The fabrication of Yb3+, Tm3+ co-doped oxyfluorophosphate glass-based composites, with green persistent luminescence after being charged with near-infrared light, is demonstrated. The mechanism responsible for the green afterglow after near-infrared illumination is unveiled. The composite is prepare...

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Bibliographic Details
Published in:Journal of alloys and compounds Vol. 927; p. 167048
Main Authors: Arango, N. Garcia, Vuori, S., Byron, H., Van der Heggen, D., Smet, P.F., Lastusaari, M., Petit, L.
Format: Journal Article
Language:English
Published: Lausanne Elsevier B.V 15-12-2022
Elsevier BV
Subjects:
Afterglows
Composite materials
Emission
Energy transfer
Fluorine
Glass
Glass ceramics
Glass-ceramic
Infrared radiation
Luminescence
Persistent luminescence
Precipitation heat treatment
Thulium
Tm3+ and Yb3+ codoping
Up-conversion
Upconversion
Glass-ceramic
Tm3+ and Yb3+ codoping
Up-conversion
Glass
Luminescence
Persistent luminescence
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Summary:The fabrication of Yb3+, Tm3+ co-doped oxyfluorophosphate glass-based composites, with green persistent luminescence after being charged with near-infrared light, is demonstrated. The mechanism responsible for the green afterglow after near-infrared illumination is unveiled. The composite is prepared using a modified melting process to limit the evaporation of fluorine during melting. Intense (blue and ultraviolet) up-conversion emission is obtained by optimizing the Yb2O3 and Tm2O3 concentrations. A heat treatment promotes volume precipitation of Yb3+, Tm3+ co-doped CaF2 crystals. Although the intensity of the blue up-conversion emission from the Tm3+1G4 level is lower in the highly Yb3+-concentrated glass-ceramic due to reverse energy transfer from Tm3+ to Yb3+, the heat treatment leads to an increase of the intensity of the emissions around 346 nm, 361 nm nm and 450 nm coming from the Tm3+1I6 and 1D2 levels. By combining the Yb3+ and Tm3+ ions with SrAl2O4:Eu2+,Dy3+crystals, green afterglow can be obtained after charging with near-infrared light. •Composites were prepared from bioactive oxyfluorophosphate glass and phosphors particles.•Direct doping process was modified to prepare the composite.•Composite exhibits green afterglow after 980 nm charging.•Mechanism responsible for the green afterglow after near-infrared illumination is unveiled..
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2022.167048