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| Home > Publications database > Pr$^{3+}$-doped RbCaF$_3$: a new X-ray-induced UVC persistent phosphor |
| Journal Article | PUBDB-2025-01871 |
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2025
Elsevier
New York, NY [u.a.]
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Please use a persistent id in citations: doi:10.1016/j.jlumin.2025.121333 doi:10.3204/PUBDB-2025-01871
Abstract: The development of persistent ultraviolet-emitting phosphors is advancing rapidly because of their promisingapplications in alternative cancer treatments. In this work, we developed a novel Pr$^{3+}$-doped RbCaF3 phosphorexhibiting intense long-persistent luminescence in the 220–340 nm range, sustained for more than an hour afterjust 15 min of X-ray irradiation. The 5d-4f luminescence of Pr$^{3+}$ ions is primarily excited by electron-hole pairsgenerated during X-ray absorption, as well as by electrons released from traps. The emission and excitationproperties of RbCaF$_3$:Pr$^{3+}$ crystallites were further investigated using synchrotron radiation, revealing thesimultaneous occurrence of intra-configurational 4f$^2$→4f$^2$ and inter-configurational 4f5d → 4f$^2$ radiative tran-sitions upon 4f5d state excitation. This work highlights the potential of Pr$^{3+}$-doped RbCaF$_3$ phosphor forinnovative applications in ultraviolet photonics and cancer therapy.
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