Power-law statistics of intermittent photoluminescence in single semiconductor nanocrystals

A physical model is proposed for a single CdSe nanocrystal coated with a ZnS shell which can explain the power-law statistics of its experimentally observed intermittent photoluminescence. If the localized electron-hole pairs (excitons) form in the nanocrystal, this suggestion alone will suffice to explain why the on-time distribution follows the law close to t (-1.5) found experimentally. (C) 2004 MAIK Nauka / Interperiodica.