posted on 2024-01-31, 23:45authored byNadiia Rebrova, Patrycja Zdeb, Karol Lemański, Bogusław Macalik, Oleksii Bezkrovnyi, Przemysław
J. Dereń
Pure and Pr3+-doped BaYF5 nanoparticles
were
synthesized by the microwave hydrothermal
method. The nanoparticles were characterized by X-ray
diffraction (XRD), transmission electron microscopy (TEM), and optical
spectroscopy. The XRD and TEM confirm that the average size of nanoparticles
is in the range of 26–37 nm. The optical excitation and luminescence
spectra of BaYF5:Pr3+ nanoparticles are presented
in the visible and ultraviolet (UV) range. It has been verified that
Pr3+ ions are capable of emitting UV-C photons when excited
by a 444 nm laser. This emission arises from a two-photon energy-transfer
upconversion mechanism. The concentration dependence of the upconversion
luminescence of BaYF5:Pr3+ was studied.