Metal halide perovskites have garnered significant attention over the years as they exhibit a diverse range of properties, making them key materials for numerous applications across various industrial fields, from catalysts and piezoelectrics to optics materials, scintillators and solar cells. Of particular interest is the use of halide perovskites as matrices for upconversion, which involves the interaction of low-energy light photons with matter, resulting in high-energy luminescent emission. A high-priority task is the search for new phosphors that efficiently convert visible light into ultraviolet (UV) radiation. Ultraviolet light initiates photochemical reactions that damage or destroy DNA and RNA in cells and viruses, making it effective for surface disinfection, wastewater treatment and cancer phototherapy [1]. The most damaging type of UV radiation is UVC (100-280 nm).
This paper presents for the first time an investigation of visible-to-UVC upconversion luminescence in Pr3+-doped fluoroperovskite crystallites. The upconversion properties of these crystallites are compared with those of LiYF4:Pr3+ phosphor. In addition, luminescent properties in the visible range will be presented.
ACKNOWLEDGEMENTS
This work was supported by The National Science Centre (NCN) under the OPUS 21 project, grant no. UMO-2021/41/B/ST5/03792, which is gratefully acknowledged. One of the authors (Oleksandr Gryppa) is thankful to Visegrad Fellowship #62410067.
[1] Minamikawa, T.; Koma, T.; Suzuki, A. et al. Quantitative Evaluation of SARS-CoV-2 Inactivation Using a Deep Ultraviolet Light-Emitting Diode. Sci. Rep. 2021, 11, 5070.
