X-ray excited luminescence and persistent luminescence of Sr₂MgSi₂O₇:Eu²⁺, Dy³⁺ and their associations with synthesis conditions

For the first time, X-ray excited luminescence of Sr₂MgSi₂O₇:Eu²⁺, Dy³⁺, an efficient persistent phosphor with good potential for lighting, biological imaging and photodynamic activation, is reported in this paper. A modified Sol-Gel method is used to synthesize Sr₂MgSi₂O₇:Eu²⁺, Dy³⁺ phosphors and their luminescence properties are highly associated with the synthesis conditions. The dependences of the X-ray excited optical luminescence and persistent luminescence of Sr₂MgSi₂O₇:Eu²⁺, Dy³⁺ on the reaction pH, temperature, ratio of Eu/Dy, and the calcination duration time are investigated and the association of the luminescence behaviors with the synthesis conditions is explored as a good strategy to optimize the phosphors for practical applications.