Giant Improvement on the Afterglow of Sr₄Al₁₄O₂₅:Eu²⁺,Dy³⁺ Phosphor by Systematic Investigation on Various Parameters

Figure 9

Afterglow decay curves of Sr₄Al₁₄O₂₅:Eu²⁺,Dy³⁺ phosphor with different Al/Sr ratio. Inset shows the Phosphorescence intensity of the corresponding phosphors just after switching off excitation source.