Size-Dependent Optical Properties of Nanoscale and Bulk Long Persistent Phosphor SrAl₂O₄:Eu²⁺, Dy³⁺

Figure 5

Decay curves at 520 nm emission peak of nanoscale (hollow circle) and bulk (solid circle) SrAl₂O₄:Eu²⁺, Dy³⁺ phosphor. The right luminance power refers to nanoscale SrAl₂O₄:Eu²⁺, Dy³⁺, the left one refers to bulk SrAl₂O₄:Eu²⁺, Dy³⁺.