A REVIEW OF CEF�?CRYSTAL

The luminescence of nanocrystalline ZnS : Mn2+ certainly reveals a brief decay time component (∼one hundred ns), and also a lengthy (ms) decay time is observed. The brief decay time is ascribed to some defect-similar emission of ZnS, and is not through the decay of the changeover from the Mn2+ impurity. The changeover from the Mn2+ contains a `re