WHAT DOES CEF�?CRYSTAL MEAN?

The luminescence of nanocrystalline ZnS : Mn2+ indeed shows a short decay time ingredient (∼100 ns), and also a protracted (ms) decay time is noticed. The brief decay time is ascribed to the defect-related emission of ZnS, and is not with the decay of the changeover on the Mn2+ impurity. The changeover in the Mn2+ includes a `standard�?decay of