Combustion Synthesis and Properties of Nano Luminescent Materials La2O3:Sm3+

Nanomaterials La2O3:Sm3+ were prepared by combustion synthesis. The morphology and structure of the materials were characterized and analyzed by TEM and XRD. The luminescent properties were also investigated. The results show that the mean particle size of the La2O3:Sm3+ nanomaterial with hexagonal structure is approximately 34 nm. Because of the Sm3+ doping, the positions of diffraction peaks of La2O3:Sm3+ move to the right slightly; The intrinsic excitation band of Sm3+ is located at around 411 nm; Under the 411 nm excitation, the major emission peaks at 4G5/2 → 6H5/2 (568 nm), 4G5/2 → 6H7/2 (611 nm, the highest intensity) and 4G5/2 → 6H9/2 (654 nm) are observed. The emission spectrum indicates the location of the Sm3+ ions is asymmetric. The decay lifetime of the Sm3+ ions is about 202 µs; the chromaticity coordinate is approximately (0.5849, 0.4143). © 2019, Science Press. All right reserved.