Quenching and dipole-dipole interactions in Sr₂Al₂SiO₇:Ce³⁺ host lattice

This article reports novel results on the optical properties of Ce³⁺-doped Sr₂Al₂SiO₇ host lattice which has been synthesized by the combustion method at 550 C for the first time. Sr₂Al₂SiO₇: Ce³⁺ phosphor shows the blue emission bands at 430 nm due to 5d-4f allowed transition of Ce³⁺ ion, keeping the excitation wavelength constant at 357 nm. Some theoretical study is carried out on the critical distance of energy transfer, concentration quenching and type of interaction in host and rare earth ion, and it is done by using the equation reported by Van Uiltert et al. Further phosphor is well characterized by XRD, SEM and EDS analysis to study phase purity, surface morphology and elemental analysis. (orig.)