NOT KNOWN FACTUAL STATEMENTS ABOUT CEF�?CRYSTAL

The luminescence of nanocrystalline ZnS : Mn2+ without a doubt exhibits a brief decay time element (∼one hundred ns), but in addition a lengthy (ms) decay time is observed. The short decay time is ascribed to some defect-connected emission of ZnS, and isn't from the decay on the transition on the Mn2+ impurity. The changeover from the Mn2+ provid