SrxAl2O4:Eu2+0.015Dy3+0.03 (x=1.1–1.7) green emitting phosphors with efficient emissive properties

Monophasic SrAl2O4:Eu2+ Dy3+ with varying Sr2+ concentration was synthesized in monoclinic symmetry by the Liquid Phase Precursor method. The composition Sr1.7Al2O4:Eu2+0.015Dy3+0.03 showed the 200% emission compared with commercial Sr0.97Al2O4:Eu2+0.01 Dy3+0.02. Time decay measurements of the doped samples were conducted for the green emission at 525 nm. All the prepared samples exhibit rapid decay and ensued phosphorescence with the longer decay times which are comparable to the commercial sample. Quantum yield product measurements results suggested that the synthesized phosphors show enhanced emissive properties over the commercial phosphor. The composition Sr1.7Al2O4:Eu2+0.015Dy3+0.03 had a photoluminescence quantum yield of 31.63%, nearly 12.7% more than the commercial sample.