The luminescence of nanocrystalline ZnS : Mn2+ in truth displays a brief decay time part (?100 ns), but will also an extended (ms) decay time is noticed. The quick decay time is ascribed into a defect-related emission of ZnS, and isn't in the decay of the transition of your Mn2+ impurity. The changeover of the Mn2+ provides a `regular??decay of abo