Self-activated luminescence characteristics of double perovskite ceramic Sr2ZrCeO6

Self-activated luminescence ceramic Sr2ZrCeO6 were prepared via typical solid-state reaction. X-ray diffraction (XRD) and scanning electron microscope (SEM) were utilized to characterize the ceramic. The photoluminescence excitation and emission spectra, the fluorescence decay curves, X-ray-excited luminescence (XEL), Stokes shift, and CIE color coordinates were investigated. The ceramics can be efficiently excited by UV light and realize yellowish-green luminescence band peaked at 520 nm with lifetime of about 6 μs. The luminescence mechanism was discussed on the base of the luminescence properties and crystal structure. The origin of the luminescence was suggested from self-activation center of the octahedral Zr–O groups from the Zr4+–O2− CT transition.