Abstract
The novel long persistent luminescence phosphors MAl2O4:Yb2+ (M = Ba, Sr) have been synthesized by a solid-state reaction. BaAl2O4:Yb2+ exhibits intense blue luminescence emission and the persistent time is even longer than the commercial phosphor SrAl2O4:Eu2+, Dy3+. The incorporation of Dy3+ ion as trap center evidently enhances persistent time of Yb2+ in SrAl2O4:Yb2+ host. We believe that MAl2O4:Yb2+ would replace the commercial SrAl2O4:Eu2+ as a new generation of long persistent luminescence materials due to the cheaper Yb2O3 than Eu2O3. To investigate the application in solar cell, MAl2O4:Yb2+ (M = Ba, Sr) phosphors are doped into methyl methacrylate monomer (MMA) polymer. The short circuit current density (Isc) of solar cell containing BaAl2O4:Yb2+ can easily be measured after removing the irradiation source.
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