Effect of solvent on luminescence properties of re-dispersible LaF3：Ln3＋ （Ln3＋=Eu3＋, Dy3＋, Sm3＋ and Tb3＋） nanoparticles

LaF3：Ln3＋ （Eu3＋, Dy3＋, Sm3＋ and Zb3＋） nanoparticles were prepared in different solvents such as water, EG （ethylene gly- col）, DMSO （dimethyl sulfoxide） and their mixed solvents at a relatively low temperature of 150 ~C by simple chemical route. All the prepared samples showed hexagonal phase and exhibited spherical morphology. The highest ltmainescence intensity was observed for the samples prepared in EG than the samples prepared in other solvents. However, the sample prepared in water showed anomalously higher luminescence intensity than that of the sample prepared in DMSO.