NOT KNOWN FACTUAL STATEMENTS ABOUT CEF�?CRYSTAL

The luminescence of nanocrystalline ZnS : Mn2+ in fact shows a short decay time component (∼a hundred ns), and also an extended (ms) decay time is observed. The short decay time is ascribed to the defect-related emission of ZnS, and is not in the decay of the changeover of the Mn2+ impurity. The changeover of the Mn2+ provides a `standard�?deca