https://doi.org/10.1051/epjconf/202328705043
CaWO4:Yb3+,Tm3+ Crystals and SrAl2O4:Eu2+,Dy3+ Phosphors in Glass-Based Composites for Green Afterglow after NIR Excitation
1 Photonics Laboratory, Tampere University, Korkeakoulunkatu 3, Tampere 33720, Finland
2 Institute of Low Temperature and Structure Research PAS, Okolna 2, 50-422, Wrocław, Poland
3 Department of Chemistry, University of Turku, FI-20014 Turku, Finland
4 University of Turku Graduate School (UTUGS), Doctoral Programme in Exact Sciences, Turku, Finland
5 LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281-S1, 9000, Gent, Belgium.
6 Department of Physics, LUT-University, Yliopistonkatu 34, Lappeenranta 53850, Finland
* Corresponding author: evellyn.santosmagalhaes@tuni.fi
Published online: 18 October 2023
Here, we present the preparation of composites with green persistent luminescence using melting process. The composites are phosphate glass (75NaPO3-25CaF2 and 90NaPO3-10NaF (in mol%)) with embedded phosphors: CaWO4: Yb3+, Tm3+ crystals with blue upconversion and SrAl2O4:Eu2+,Dy3+ with green persistent luminescence. Green persistent luminescence above 0.3 mcd/m2 can be seen for ~ 30 minutes after charging with 980 nm due to energy transfer between the blue upconverter crystals and the persistent luminescent phosphors. Challenges related to the fabrication of such composites are discussed.
© The Authors, published by EDP Sciences, 2023
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