Long Persistent Afterglow Luminescence in Gd<sub>3</sub>Al<sub>3</sub>Ga<sub>2</sub>O<sub>12</sub>:Ce<sup>3+</sup>, Green Emitting Aluminate Phosphor

Green LL is observed in Ce doped Gd 3 Al 5 O 12 : Ce, Ga garnet phosphors. LL is well correlated with Ce 3+ emission and a peak around 150°C in the TL glow curve. In comparison with the commercial phosphor YAG, the Gd 3 Al 5 O 12 : Ce, Ga (GAG) is more stable and shows more intense TL properties, this phosphor can be used for dosimetry detections and measurements. Gd 3 Al 5 O 12 activated with Ce (0.7 mol.%) phosphors were prepared by combustion synthesis. The long-lasting luminescence (LL) is also reported in Pr 3+ and Ce 3+ doped in reducing atmosphere in YAG phosphor. But YAG: Ce gives yellow emission which doesn’t suit LL applications. On the other hand, Ga substituted GdAG: Ce phosphor gives green emission at shorter wavelengths. In this paper we explored Ga substituted GdAG: Ce phosphor prepared by combustion synthesis for LL, results of these investigations are reported in this paper.