Flux-solvothermal preparation of dispersible LiLa_(0.4)Nd_(0.6)(PO3)_4 microcrystals with regular morphology and superior fluorescence

摘要

A flux-solvothermal method was used to grow a type of novel dispersible LiLa_(0.4)Nd_(0.6)(PO3)_4 microcrystals with high Nd~(3+) ions concentration of 2.63 × 10~(21) cm~(-3) and excellent fluorescence properties for the first time. By optimizing experimental conditions, microcrystals with sizes in the region of 1.5-5 μm, a strong emission intensity and long lifetime of 107 μs were obtained. The results show that their transparent dispersion in the mixed solvents of DMSO and CHBr2CHBr2 had a strong absorption at 800 nm, low solvent quenching ratio of 6.5%, high quantum yield of 32.17% and large emission cross section of 4.39 × 10~(-20) cm~2 when the Nd~(3+) ions concentration is 1 × 10~(-20) cm~(-3), which imply the microcrystals are of potential application in transparent glass-ceramics, dispersion amplifiers and lasers.