Abstract
Luminescent properties in visible spectral range of crystalline LaF 3 nanoparticles containing 1 % and 5 % of Sm 3+ ions before and after microwave hydrothermal treatment and also Sm:LaF 3 @LaF 3 core-shell nanoparticles were studied. The LaF3 surface layer resulted in lowering the luminescence decay time apparently due to eliminating surface quenching factors. This opens the way to manage luminescence and energy transfer properties of the material.
Highlights
Crystalline nanoparticles of LaF3 compound, doped with various rare-earth ions are of great interest today for unique combination of optical and physical properties
Depending on luminescence and excitation spectral ranges of action these materials are prospective in bioimaging, lamp phosphors, quantum cutting, up-conversion, luminescent material for combined photodynamic therapy [1,2]
Crystalline Sm:LaF3 nanoparticles were fabricated via co-precipitation method described earlier [3,4]
Summary
Crystalline nanoparticles of LaF3 compound, doped with various rare-earth ions are of great interest today for unique combination of optical and physical properties. Composite materials based on these nanoparticles can be utilized as elements for quantum devices. Aim of this work is to study opportunities to manage luminescence decay properties of Sm3+ ions in LaF3 nanoparticles by chemical approach.
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