CEF�?CRYSTAL - AN OVERVIEW

The luminescence of nanocrystalline ZnS : Mn2+ certainly shows a short decay time part (∼one hundred ns), but in addition a long (ms) decay time is noticed. The brief decay time is ascribed to the defect-similar emission of ZnS, and is not within the decay in the changeover of the Mn2+ impurity. The transition with the Mn2+ includes a `ordinaryï¿