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Ho3+ single-doped YF3 nanoparticles were successfully synthesized by a hydrothermal method. Ultraviolet upconversion luminescence around 288nm was observed clearly in YF3:Ho3+ nanoparticles under excitation at 450nm. The structure, composition and upconversion emission properties of the as-prepared products were characterized by X-ray crystallography, scanning electron spectrophotometry, energy-dispersive...
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