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Praseodymium(Ⅲ) doped CeF_3, CeF_3:Gd, LaF_3, GdF_3 and YF_3 inorganic fluorides were precipitated in an aqueous, surfactant-free solution, using NH_4 F as a source of fluoride ions. The as-prepared products were subjected to a hydrothermal treatment, which led to the formation of crystalline nanoluminophores, composed of spherical(≈30 nm) and elongated(≈40–200 nm) nanostructures. Due to the presence of Pr~(3+) ions, the synthesized nanomaterials showed yellow luminescence under a blue light irradiation. The nanoluminophore based on the YF_3 host revealed the most promising spectroscopic properties, i.e., bright and intensive emission, hence it was investigated in detail. The photophysical properties of the nanomaterials obtained were studied by powder X-ray diffraction(XRD), transmission electron microscopy(TEM) and spectrofluorometry, i.e., measurements of excitation/emission spectra and luminescence decay curves.
Praseodymium (Ⅲ) doped CeF_3, CeF_3: Gd, LaF_3, GdF_3 and YF_3 inorganic fluorides were precipitated in an aqueous, surfactant-free solution, using NH_4F as a source of fluoride ions. The as-prepared products were subjected to a hydrothermal treatment , which led to the formation of crystalline nanoluminophores, composed of spherical (≈30 nm) and elongated (≈40-200 nm) nanostructures. Due to the presence of Pr ~ (3+) ions, the synthesized nanomaterials showed yellow luminescence under a blue light irradiation. The nanoluminophore based on the YF_3 host revealed the most promising spectroscopic properties, ie, bright and intensive emission, hence it was investigated in detail. The photophysical properties of the nanomaterials obtained were studied by powder X-ray diffraction (XRD) , transmission electron microscopy (TEM) and spectrofluorometry, ie, measurements of excitation / emission spectra and luminescence decay curves.