Synthesis and luminescent properties of Eu~(3+)-doped Na_(24)As_2W_(22)O_(83)

摘要

The Eu~(3+)-doped Na_(24)As_2W_(22)O_(83) phosphor has been prepared by solid state reaction from Na_3AsO_4·12H_2O, Na_2WO_4·2H_2O and WO_3, and characterized by elemental analysis, infrared spectroscopy and powder X-ray diffractometry. According to the measurements with X-ray diffraction, this material belongs to orthorhombic system with its lattice constants: a = 1.4750 nm, b = 1.1944 nm, c = 1.1062 nm, it is consistent with space group D_2~4-P2_12_12_1 (No.19). The emission and excitation spectra were measured. The luminescent properties of Eu~(3+)-doped Na_(24)As_2W_(22)O_(83) and mechanism of energy transfer were discussed.