Spectroscopic properties and tunable color emission via Ce³⁺/Dy³⁺ energy transfer in K₂O–Al₂O₃–P₂O₅ glasses for solid-state lighting and scintillation applications
Issued Date
2025-11-05
Resource Type
ISSN
09258388
Scopus ID
2-s2.0-105019521343
Journal Title
Journal of Alloys and Compounds
Volume
1044
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Alloys and Compounds Vol.1044 (2025)
Suggested Citation
Abbas J., Zaman F., Khan A., Saqib N.U., Rooh G., Choodam K., Kanjanaboos P., Intachai N., Kothan S., Albargi H.B., Kiwsakunkran N., Ali S., Chanthima N., Kaewkhao J. Spectroscopic properties and tunable color emission via Ce³⁺/Dy³⁺ energy transfer in K₂O–Al₂O₃–P₂O₅ glasses for solid-state lighting and scintillation applications. Journal of Alloys and Compounds Vol.1044 (2025). doi:10.1016/j.jallcom.2025.184294 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/112812
Title
Spectroscopic properties and tunable color emission via Ce³⁺/Dy³⁺ energy transfer in K₂O–Al₂O₃–P₂O₅ glasses for solid-state lighting and scintillation applications
Corresponding Author(s)
Other Contributor(s)
Abstract
The investigation of luminescent glasses has long aimed to improve emission intensity. Phosphate glasses doped with rare-earth (RE) ions are regarded as a promising high-gain laser material due to their favorable spectroscopic properties. In this study, a new series of glasses with the composition 15 K<inf>2</inf>O-20Al<inf>2</inf>O<inf>3</inf>-(64.5-X)P<inf>2</inf>O<inf>5</inf>-0.5CeF<inf>3</inf>-XDy<inf>2</inf>O<inf>3</inf>, where X = 0.0, 0.1, 0.3, 0.5, 1.0, and 2.0 mol%, were synthesized using the solid-state reaction method. The physicochemical and optical properties were characterized by using X-ray diffraction (XRD), optical absorption spectroscopy, photoluminescence (PL) analysis, Judd–Ofelt (J-O) parameterization, decay time measurements, and photoluminescence quantum yield (PLQY) determinations. XRD confirmed the amorphous nature of all samples. The absorption spectra revealed ten distinct bands, including a hypersensitive transition at ⁶H₉/₂ + ⁶F₁₁/₂, centered at 1278 nm. The glasses exhibited characteristic PL emissions in the blue (∼484 nm) and yellow (∼575 nm) regions. The J-O intensity parameters followed the order Ω2 > Ω6 > Ω4, indicating strong transitions. The <sup>4</sup>F<inf>9/2</inf>→<sup>6</sup>H<inf>13/2</inf> transition of Dy³ ⁺ ions displayed a high stimulated emission cross-section (15.733 × 10⁻²² cm²), branching ratio (βᵣ; Exp. = 0.637, Cal. = 0.593), and radiative transition probability (583.1 s⁻¹). The measured decay time of Dy³ ⁺ emission at 574 nm (λₑₓ = 350 nm) decreased with increasing Dy³ ⁺ concentration, reaching a minimum of 0.52 ns at 2.0 mol%. Photoluminescence and X-ray luminescence spectra showed close agreement, both dominated by similar emission bands, confirming consistent radiative channels. Under UV excitation, Ce<sup>3+</sup>/Dy<sup>3+</sup> co-doped glasses exhibited radiative energy transfer from Ce<sup>3+</sup> to Dy<sup>3+</sup>, with emission intensity increasing as Dy<sup>3+</sup> ion concentration increased. The highest PLQY value of 37.62 % was recorded for the 0.5Ce:0.1Dy glass sample. Additionally, the CIE coordinates (0.3895, 0.4332) and correlated color temperature (CCT) of 4100 K demonstrate that Ce<sup>3+</sup>/Dy<sup>3+</sup> co-doped K₂O–Al₂O₃–P₂O₅ glasses are promising fluorescent materials for solid-state lighting devices.