Influences of Eu~(2+)and Dy~(3+) Contents on the Properties of Long Afterglow Strontium Aluminate Phosphors

摘要

The detailed preparation process of Eu~(2-) and Dy~(3+) ion co-doped phosphor powders in Sr_4Al_(14)O_(25):Eu~(2+)/Dy~(3+) phosphor system with bluish-green long afterglow produced by solid state reaction method under reducing atmosphere is here reported.X-ray diffraction (XRD), scanning electron microscopy (SEM), and particle size analysis were made to assign the effects of Eu and Dy ions on the luminescent properties of the synthesized phosphors, which were determined by measuring the photolumincsccncc spectra. The maximum emission intensity of these phosphors under excitation was investigated. As a result, the relevant values were obtained from the phosphorescent pigment with 0.21% and 0.05% molar percent of Eu~(2+) and Dy~(3+).