THE 2-MINUTE RULE FOR CEF�?CRYSTAL

The luminescence of nanocrystalline ZnS : Mn2+ in truth shows a short decay time element (∼100 ns), but also a lengthy (ms) decay time is observed. The brief decay time is ascribed to some defect-similar emission of ZnS, and isn't from the decay in the transition on the Mn2+ impurity. The changeover from the Mn2+ has a `standard�?decay of about