Co-precipitation synthesis and optical properties of green-emitting Ba2MgSi2O7:Eu2+ phosphor

Green-emitting Ba2−xMgSi2O7:xEu2+ phosphor was prepared by co-precipitation. The dependence of the phase and emission spectra of the phosphor on sintered temperature was investigated. The photoluminescence (PL) intensities of the phosphors with various Eu2+ contents from 0.04 to 0.07 showed concentration quenching at 0.05. The substitution of Ba2+ by dopant Eu2+ at 0.05 in the Ba2MgSi2O7 host matrix did not change the unit cell volume and of the SiOSi angle. The PL decay times at the peak and cross band of the spectrum present carrier lifetimes with similar values at 550 ns for Ba1.95MgSi2O7:0.05Eu2+ phosphor. The carrier lifetimes at different excitation wavelengths indicated that the phosphor prepared by co-precipitation is a superior candidate for fabricating white light.