We report on long-lasting afterglow phosphorescence at around 500 nm in Ce 3+ -doped yttrium scandium gallium garnet (YSGG) ceramics with the composition of (Y 0.995 Ce 0.005 ) 3 Sc 2 Ga 3 O 12 prepared by solid-state reaction at 1600 °C. The afterglow luminescence was observed for 1 h after the 440 nm excitation in the Ce:YSGG ceramic prepared under vacuum. However, the afterglow decay time decreased after O 2 annealing. Therefore, one of the potential traps can be oxygen vacancies. Based on the correlation between the 5d levels and the conduction band, we present an afterglow mechanism and propose a new persistent phosphor under white light emitting diode (LED) illumination.
No takes yet. Share an insight, caveat, or question.
Ueda et al. (2011) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: