Author/Authors :
Alberthmeiry T. de Figueiredo، نويسنده , , Valeria M. Longo، نويسنده , , Sérgio de Lazaro، نويسنده , , Valmor R. Mastelaro، نويسنده , , F?bio S. De Vicente، نويسنده , ,
Antonio C. Hernandes، نويسنده , , Maximo Siu Li، نويسنده , , José A. Varela، نويسنده , , Elson Longo، نويسنده ,
Abstract :
Blue-green and red photoluminescence (PL) emission in structurally disordered CaTiO3:Sm (CT:Sm) powders was observed at room temperature with laser excitation at 350.7 nm. The perovskite-like titanate CT:Sm powders prepared by a soft chemical processing at different temperatures of annealing were structurally characterized by X-ray diffraction (XRD) and X-ray absorption near-edge structure (XANES). The results indicate that the generation of the broad PL band is related to order–disorder degree in the perovskite-like structure.
Keywords :
Luminescence , Order–disorder , optical materials , CT:Sm
