CEF�?CRYSTAL - AN OVERVIEW

The luminescence of nanocrystalline ZnS : Mn2+ certainly reveals a short decay time ingredient (∼one hundred ns), but in addition a long (ms) decay time is noticed. The small decay time is ascribed to the defect-connected emission of ZnS, and isn't in the decay of the transition with the Mn2+ impurity. The changeover from the Mn2+ provides a `nor