AN UNBIASED VIEW OF CEF�?CRYSTAL

The luminescence of nanocrystalline ZnS : Mn2+ in truth shows a short decay time part (∼a hundred ns), but also a protracted (ms) decay time is observed. The quick decay time is ascribed to the defect-associated emission of ZnS, and is not through the decay in the changeover in the Mn2+ impurity. The transition in the Mn2+ provides a `usual�?de