The luminescent properties and crystal structure of Sr (1.5‐ x )‐(1.5 y ) Mg 0.5 SiO 4 : x Eu 2+ , y Ce 3+ blue phosphor synthesized by co‐precipitation method

In order to improve the luminescent performance of silicate blue phosphors, Sr (1.5‐ x )‐(1.5 y ) Mg 0.5 SiO 4 : x Eu 2 + , y Ce 3+ phosphors were synthesized using one‐step calcination of a precursor prepared by chemical co‐precipitation. The crystal structure and luminescent properties of the phosphors were analyzed using X‐ray diffraction and fluorescence spectrophotometry, respectively. Because the activated ions (Eu 2+ ) can occupy two different types of sites (Sr 1 and Sr 2 ), the emission spectrum of Eu 2 + excited at 350 nm contains two single bands (EM 1 and EM 2 ) in the wavelength range 400–550 nm, centered at 463 nm, and the emission intensity first increases and then decreases with increasing concentrations of Eu 2 + ions. Co‐doping of Ce 3 + ions can greatly enhance the emission intensity of Eu 2 + by transferring its excitation energy to Eu 2 + . Because of concentration quenching, a higher substitution concentration of Ce 3 + can lead to a decrease in the intensity. Meanwhile, the quantum efficiency of the phosphor is improved after doping with Ce 3 + , and a blue shift phenomenon is observed in the CIE chromaticity diagram. The results indicate that Sr (1.5‐ x )‐(1.5 y ) Mg 0.5 SiO 4 : x Eu 2+ , y Ce 3+ can be used as a potential new blue phosphor for white light‐emitting diodes.