CEF�?CRYSTAL FUNDAMENTALS EXPLAINED

The luminescence of nanocrystalline ZnS : Mn2+ in truth shows a brief decay time component (∼one hundred ns), but in addition an extended (ms) decay time is observed. The shorter decay time is ascribed into a defect-relevant emission of ZnS, and is not within the decay from the changeover in the Mn2+ impurity. The changeover of the Mn2+ includes