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Zdeb-Stańczykowska, Patrycja; Rebrova, Nadiia; Zorenko, Yuriy; Voloshinovskii, Anatoliy; Pushak, Andrii; Dereń, Przemysław, 2026, "Multifunctional Pr3+-doped LiNaY2F8 phosphor for visible-to-UVC and X-ray-to-UVC conversion", https://doi.org/10.18150/ANPNT5, RepOD, V1
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Pr³⁺-doped LiNaY₂F₈ phosphors were synthesized and systematically investigated to evaluate their structural and luminescent properties under various excitation conditions. The material exhibits intense ultraviolet-C (UVC) emission around 250 nm attributed to 4f5d→4f transitions of Pr³⁺ ions. Upon blue-light excitation (~444 nm), efficient visible-to-UVC upconversion is achieved via a two-photon absorption process. Furthermore, strong UVC emission is observed under X-ray irradiation, demonstrating effective X-ray-to-UVC scintillation behavior. Detailed spectroscopic analysis reveals the excitation pathways and relaxation mechanisms governing the UVC emission. The demonstrated dual-mode excitation capability highlights LiNaY₂F₈:Pr³⁺ as a multifunctional phosphor with potential for applications in sterilization, radiation detection, and compact UVC light sources.
UVC radiation, upconversion phosphors, Pr3+ -doped fluoride crystals, LiNaY2F8, photon cascade emission, scintillation
P. Zdeb-Stańczykowska, N. Rebrova, Y. Zorenko, A. Voloshinovskii, A. Pushak, P.J. Dereń, Multifunctional Pr3+-doped LiNaY2F8 phosphor for visible-to-UVC and X-ray-to-UVC conversion, Journal of Alloys and Compounds 1016 (2025) 178807. https://doi.org/10.1016/j.jallcom.2025.178807. https://www.sciencedirect.com/science/article/pii/S0925838825003652? doi: https://doi.org/10.1016/j.jallcom.2025.178807
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