Abstract
We report on the long-lasting phosphorescence in Ti-doped BaZrO3 perovskite-type crystals (synthesized by a solid-state reaction method). The phosphorescence color is blue and the phosphorescence can still be seen with the naked eye for 30 minutes or more in the dark after stopping UV light. By the measurement of electron spin resonance (ESR) spectra, it was confirmed that the defects of F+ center and Zr3+ exist in the Ti: BaZrO3 and their concentrations decrease with the additive amount of TiO2. It is expected that the luminescence center is FA center composed of Ti3+ and F+ center.
