Ultraviolet‑C Upconversion Luminescence of Pr³⁺-Doped Fluorophosphate Glass.

ABSTRACT: The increasing demand for ultraviolet (UV) sterilization requires the development of new luminescent materials in the UVC region (100-280 nm). In this study, to obtain blue-to-UVC upconversion (UC) luminescence, fluorophosphate glasses doped with various Pr3+ concentrations were prepared by using the melt-quenching method, and their optical properties were evaluated. Absorption bands attributed to the 4f15d1 → 4f2 and 4f2 → 4f2 transitions of Pr3+ were observed at shorter than 230 nm and in the 430-490 nm range, respectively. The relatively high phonon energies promote strong 1D2 emission, which is highly sensitive to concentration quenching, leading to a decrease of the Pr3+ luminescence quantum yield at doping levels above 0.1%. Due to the small centroid shift and small crystal field spl

SUBMITTER: Takayama K 

PROVIDER: S-EPMC12368704 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature