Synthesis and luminescence properties of Sr3–z(AlxSi1x)O5–xFx:zCe3+ phosphors

Abstract Sr 3– z (Al x ,Si 1– x )O 5– x F x : z Ce 3+ phosphors were synthesized by high-temperature solid-state reaction. The structure and luminescence properties of phosphors with various Al/Si ratios and Ce 3+ concentrations were characterized using various methods such as X-ray diffraction, photoluminescence excitation and photoluminescence spectra. XRD result displayed that a complete solid solution between Sr 3 AlO 4 F and Sr 3 SiO 5 was formed. With the increasing of x value, a broader excitation band and stronger absorption appeared in the blue light region. Moreover, the emission band shifted to a shorter wavelength and the emission intensity reached a maximum at x =0.6. By adjusting the concentration of Ce 3+ , a widely tunable range of emission wavelength under the excitation of 460 nm was obtained from the green to yellow regions. In addition, the concentration and thermal quenching were also discussed.