Wet chemical synthesis of Na_(21)(SO4)7F6Cl:Ce optoelectronics materials

摘要

A new Na_(21)(SO4)7F6Cl optoelectronics nano phosphor in the Cl-F system doped with Ce~(3+) and synthesized by wet chemical method having particle size up to 100 nm has been reported here and their luminescence properties were investigated by changing the concentration of activators in the host matrix. Polycrystalline Na_(21)(SO4)7F6Cl:Ce~(3+) nanophosphors have been studied for their X-ray diffraction, SEM, TEM, FT-IR and photoluminescence (PL) characteristics. The halo sulphate phosphor Na_(21)(SO4)7F6Cl:Ce~(3+) show an efficient broad band emission at 389 nm in near UV region assigned to ~4f_0~5di_1—> ~4f_1 transition when excited at 355 nm. The investigated halo sulphate phosphors may be suitable for a near UV excited solid state lighting devices.