Pink light emitting long-lasting phosphorescence in Sm3+-doped CdSiO3

Novel pink light emitting long-lasting afterglow CdSiO3:Sm3+ phosphors are prepared by the conventional high-temperature solid-state method and their luminescent properties are investigated. XRD and photoluminescence (PL) spectra are used to characterize the synthesized phosphors. The phosphors are well crystallized by calcinations at 1050 degree sign C for 5 h. These phosphors emit pink light and show long-lasting phosphorescence after they are excited with 254 nm ultraviolet light. The phosphorescence lasts for nearly 5 h in the light perception of the dark-adapted human eye (0.32 mcd/m2). The phosphorescence mechanism is also investigated. All the results indicate that these phosphors have promising potential practical applications