Research of luminescence properties of trivalent samarium ions doped calcium titanate

A sol-gel synthesis method was introduced to incorporate trivalent samarium ions into perovskite CaTiO₃ nanoparticles luminescent materials. The resulting materials were characterized by X-ray diffraction (XRD). The properties of luminescence of Sm³⁺ in the sample were studied by measured electroluminescence and photoluminescence, Sm³⁺ can emit salmon pink light brightly. However, the patterns of EL and PL are not the same. After analyzing the test results, we think there are two crystal structures: SiteI and SiteII, and analyzed the influences of different structures on EL and PL, the EL mainly depended on the Sm³⁺ in SiteI, the PL mainly depended on the Sm³⁺ in SiteII, and validated the influences of matrixes' structures on luminescence of Sm³⁺ with experiments.