TOP CEF�?CRYSTAL SECRETS

The luminescence of nanocrystalline ZnS : Mn2+ indeed exhibits a short decay time ingredient (∼a hundred ns), and also an extended (ms) decay time is noticed. The limited decay time is ascribed to the defect-relevant emission of ZnS, and is not from the decay on the changeover of the Mn2+ impurity. The transition with the Mn2+ features a `ordinar