THE BEST SIDE OF CEF�?CRYSTAL

The luminescence of nanocrystalline ZnS : Mn2+ in truth reveals a short decay time ingredient (∼a hundred ns), but in addition a long (ms) decay time is observed. The shorter decay time is ascribed into a defect-similar emission of ZnS, and is not from the decay of the changeover of the Mn2+ impurity. The transition with the Mn2+ features a `usua