Sr2CaWxMo1−xO6:Eu3+, Li+: An emission tunable phosphor through site symmetry and excitation wavelength

Abstract A series of Eu 3+ substituted double-perovskite Sr 2 CaW x Mo 1− x O 6 phosphors were prepared by solid state reactions. The phase, photoluminescence and energy transfer of the phosphors were investigated by X-ray diffraction (XRD), photoluminescence (PL) and luminescence decay respectively. It is found that the emission of the Eu 3+ substituted double perovskites depends on both the site symmetry of the activators and the excitation wavelengths. Based on the decay analysis of Sr 2 CaW x Mo 1− x O 6 matrix and Eu 3+ doped samples, the energy transfer efficiencies between the host and activators Eu 3+ were investigated. The results of the emission tunable phosphors indicate their potential applications in LEDs.