A REVIEW OF CEF�?CRYSTAL

The luminescence of nanocrystalline ZnS : Mn2+ in truth demonstrates a short decay time part (∼a hundred ns), but in addition a long (ms) decay time is observed. The shorter decay time is ascribed into a defect-linked emission of ZnS, and is not within the decay with the transition with the Mn2+ impurity. The transition on the Mn2+ contains a `ty