Photoluminescence properties of green emitting phosphor Y4Al2O9: Tb3+ derived by modified combustion route

Abstract

Abstract The Tb3+-doped Y4Al2O9 powders were synthesized by combustion technique employing dual (Glycine +Urea) fuel. Formation of the compound was confirmed by xRd technique. Photoluminescence (PL) properties of Tb3+ ions doped Y4Al2O9 (with Tb3+concentration = 0.5,1,1.5,2, 2.5 mol%) were investigated. It was found that Y4(1-x)Tb4xAl2O9 phosphor exhibits green emission under 251 nm excitation. The emission intensity is found to be maximum at 2 mol % of Tb3+ activation further increase in Tb3+ incorporation deceases the emission intensity exhibiting concentration quenching.