DETAILED NOTES ON CEF�?CRYSTAL

The luminescence of nanocrystalline ZnS : Mn2+ in truth reveals a brief decay time part (∼a hundred ns), and also a long (ms) decay time is observed. The shorter decay time is ascribed into a defect-related emission of ZnS, and is not from the decay in the transition in the Mn2+ impurity. The transition of the Mn2+ includes a `usual�?decay of a