Abstracts
Novel capabilities in luminescence research (photodetection, spectroscopy, imaging, analysis)
New persistent luminescent glass composites: viscous sintering synthesis and X-ray nanoscopy characterizationLucas C. V. Rodrigues1, Victor M. P. da Silva2, Elaine A. Mattos1, David V. D. Heggen3, Philippe F. Smet3, Verônica C. Teixeira4, Danilo Manzani5, Roger G. Fernandes6
1Institute of Chemistry, University of São Paulo, São Paulo, Brazil, 2São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil , 3LumiLab, Department of Solid State Sciences, Ghent University, Ghent, Belgium, 4Brazilian Synchrotron Light Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, Brazil, 5São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil , 6Institute of Chemistry, University of São Paulo, São Paulo, Brazil and Brazilian Synchrotron Light Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, Brazil
E-mail: lucascvr@iq.usp.br
Translucent persistent luminescent glass matrix composites (PeL-GMCs) were successfully prepared using viscous sintering. The synthesis consisted by mixing commercial persistent luminescent microparticles (PeL-MPs) of SrAl2O4:Eu2+,Dy3+, CaAl2O4:Eu2+,Nd3+, or SrMgSi2O7:Eu2+,Dy3+ with soda-lime-silicate glass beads, followed by heat treatment in air or vacuum atmospheres at temperatures ranging between the glass transition and the liquidus temperature (in the higher-viscosity range).Thermoluminescence analysis and persistent luminescence decay times confirmed that the energy storage properties of the PeL-GMCs are similar to the Pel-Mps. Microstructural characterizations using optical and electron microscopy, revealed the pore distribution and particle morphology within the glass matrix composites (GMCs). Additionally, X-ray dispersion spectroscopy (EDX) showed the distribution of chemical elements within a polished cross-section of the GMCs, indicating no observed phase formation at the interface between PeL-MPs and the glass matrix. Despite the presence of porosity in the final materials, the PeL-GMCs exhibited translucency and prolonged persistent luminescence, demonstrating excellent compatibility between the PeL-MPs and the glass host.
Keywords: persistent luminescence, energy storage, glasses, Nanoscopy
Acknowledgments: FAPESP (#2021/05603-1, #2021/08111-2 and 2022/13267-4), CNPq (#405048/2021-1 (DM) #315126/2021-3 (LCVR), #310890/2021-7 (VCT)) and CAPES.