Highly luminescent red light phosphor CaTiO3:Eu3+ under near-ultraviolet excitation

The Eu-doped CaTiO3 particles with a good crystallinity were prepared via sol-gel method. The phosphors showed a strong red emission corresponding to 5D0→7F2 (618 nm) of Eu3+ under the near-ultraviolet excitation (400 nm). X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), photoluminescent (PL) analysis and Brunauer-Emmett-Teller (BET) specific surface area measurement were utilized to characterize the CaTiO3:Eu3+ particles. The concentration quenching and thermal quenching of the samples were discussed as well. The optimal concentration and the calcination temperature were 16 mol% of Eu3+ and 1400 °C for these phosphors, and the possible reason was discussed as well. CaTiO3:Eu3+ is a promising red phosphor under near-ultraviolet excitation for various applications.