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

Sr3–z(Alx,Si1–x)O5–xFx:zCe3+ phosphors were synthesized by high-temperature solid-state reaction. The structure and luminescence properties of phosphors with various Al/Si ratios and Ce3+ 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 Sr3AlO4F and Sr3SiO5 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 Ce3+, 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.

Excitation and emission spectra of Sr2.975(Al1−x,Six)O5−xFx: 0.05Ce3+ with x=1, 0.6 and 0 at room temperatureFigure optionsDownload as PowerPoint slide