Juniar Hutahaean, Pintor Simamora, Juniastel Rajagukguk, Elyzabeth Simanullang, Chayani Sarumaha, Yotsakit Ruangtaweep, Jakrapong Kaewkhao
Dy3+ doped silico-phosphate glasses with compositions 15QS-59.5P2O5-15CaO-5BaO-5 Gd2O3-0.5 Dy2O3 (PGdO) and 15QS-59.5P2O5-15CaO-5BaO-5 GdF3-0.5 Dy2O3 (PGdF) were successfully synthesized using the melt-quenching technique with locally sourced quartz sand from Huta Ginjang, Indonesia. The structural, optical, and luminescence properties were systematically investigated to evaluate the effect of oxide and fluoride modifiers. The absorption spectra revealed characteristic Dy3+ transitions, while Judd-Ofelt analysis showed the trend Ω2 > Ω6 > Ω4, indicating an asymmetric local environment. Photoluminescence studies demonstrated strong blue (483 nm) and yellow (574 nm) emissions with efficient Gd3+ → Dy3+ energy transfer. PGdF exhibited enhanced emission intensity due to reduced phonon energy and lower non-radiative losses. Radiative properties confirmed that the4F9/2 →6H13/2transition dominates with high emission cross-section and branching ratio. Lifetime analysis revealed comparable decay behavior, with slightly improved performance in PGdF. Under X-ray excitation, both glasses exhibited measurable scintillation response, with PGdO showing higher efficiency due to its higher density. These results demonstrate that oxide-fluoride modification effectively tunes the spectroscopic properties, highlighting the potential of these glasses for applications in solid-state lighting, optical amplifiers, and radiation detection. © 2026, Jomard Publishing. All rights reserved.
Department of Physics, Universitas Negeri Medan, Medan, Indonesia; Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand; Physics Program, Nakhon Pathom Rajabhat University, Nakhon Pathom, Thailand; Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom, Thailand
