Recombination dynamics of luminescence in colloidal CdSe/ZnS quantum dots
Journal
Nanotechnology
Journal Volume
16
Journal Issue
9
Pages
1517-1521
Date Issued
2005
Author(s)
Abstract
Recombination dynamics of photoluminescence (PL) in colloidal CdSe/ZnS quantum dots (QDs) were studied using time-resolved PL measurements. The PL intensity shows a biexponential decay at 9 K, consisting of a fast component (?1 ns) and a slow component (?6.3 ns). Based on the emission-energy and temperature dependence of carrier lifetimes, we suggest that the fast and slow PL decay of colloidal CdSe/ZnS QDs originates from recombination of the delocalized carriers in the internal core states and the localized carriers at the interface, respectively. ? 2005 IOP Publishing Ltd.
Type
journal article