Sr_xAl₂O₄: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 Sr _1.7Al₂O₄:Eu²⁺_0.015Dy ³⁺_0.03 showed the 200% emission compared with commercial Sr_0.97Al₂O₄: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 Sr_1.7Al ₂O₄:Eu²⁺_0.015Dy³⁺ _0.03 had a photoluminescence quantum yield of 31.63%, nearly 12.7% more than the commercial sample.