Persistent luminescence property of rare earth doped BaMg2Al6Si9O30 phosphor

Several rare earth single-doped and co-doped BaMg2Al6Si9O30 phosphors were synthesized by high temperature solid-state reaction. Their persistent luminescence property was studied by means of afterglow time and thermoluminescence curves. Single-doped phosphor with 0.1 mol% ratio Eu2+ replacing Ba2+ obtained 143 s' afterglow time. When doping concentration was increased from 0.1% to 0.4%, thermoluminescence peek around 75 °C rose nearly linearly, but afterglow time was shorted to 97 s at 0.2% and 74 s at 0.4%. This indicated that trap center density increased slower than luminescence center density in BaMg2Al6Si9O30:Eu phosphor. Relative low afterglow performance could be ascribed to a relative low ratio of replaceable cation (Ba2+ in our case), and this deduction could also suit to other host matrices.