A REVIEW OF CEF�?CRYSTAL

The luminescence of nanocrystalline ZnS : Mn2+ in fact reveals a brief decay time part (∼100 ns), but additionally a lengthy (ms) decay time is observed. The brief decay time is ascribed to a defect-connected emission of ZnS, and isn't from the decay on the changeover from the Mn2+ impurity. The transition of the Mn2+ incorporates a `ordinary�?