Synthesis of blue-green phosphors SrilEu 2+ by gel-combustion method and their luminescent properties

Sr 4si 3o 8cl 4: eu 2+ blue-green phosphors were synthesized by the gel-combustion method. the as-synthesized phosphors were analyzed and characterized by x-ray diffraction and fluorescence spectrophotometer. the results indicate that orthorhombic phase sr 4si 3o 8cl 4: eu 2+ has been formed after the precursor calcined at 900°c reductive temperature. the excitation spectrum of sr 4si 3o 8cl 4: eu 2+ is a broad band in the range of 250 ∼ 450 nm and the main peak at 324 nm. the emission spectrum is also a broad band with the main emission peak at about 484 nm,which is ascribed to the typical 4f5d 1 to 4f 7 transition of eu 2+. moreover,the effects of the concentration of eu 2+,the reductive temperature,and the doping amount of mg 2+ on luminescent properties were discussed. © 2013 yong-qing zhai et al.