Synthesis and luminescence properties of europium activated Ca3Al2O6-Sr3Al2O6 system

Divalent europium activated tristrontium dialuminum hexaoxide phosphor, (Sr1–xEux)3Al2O6, was obtained by solid state reaction. Crystal structure and luminescence properties of synthesized (Sr1–xEux)3Al2O6 were investigated. The major excitation band of (Sr1–xEux)3Al2O6 located in blue light region, the photoluminescence spectrum showed red light emission peaked at 618 nm which could be attributed to the d-f transition of the Eu2+. The influence of Ca2+ substitution for Sr2+ on structural and luminescence properties of Eu2+ doped Sr3Al2O6 was also studied. The photoluminescence peak position of (Sr1–yCay)2.94Eu0.06Al2O6 varied from 618 to 655 nm with increasing y value. The reason for redshift in the emission band of (Sr1–yCay)2.94Eu0.06Al2O6 phosphor was also discussed.