TOP CEF�?CRYSTAL SECRETS

The luminescence of nanocrystalline ZnS : Mn2+ indeed demonstrates a short decay time element (∼one hundred ns), but also an extended (ms) decay time is observed. The limited decay time is ascribed to a defect-linked emission of ZnS, and isn't within the decay of your changeover on the Mn2+ impurity. The transition from the Mn2+ features a `typic