Recombination dynamics of luminescence in colloidal CdSe/ZnS quantum dots

W. Z. Lee, G. W. Shu, J. S. Wang, J. L. Shen*, C. A. Lin, W. H. Chang, R. C. Ruaan, Wu-Ching Chou, C. H. Lu, Y. C. Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

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.

Original languageEnglish
Pages (from-to)1517-1521
Number of pages5
JournalNanotechnology
Volume16
Issue number9
DOIs
StatePublished - 1 Sep 2005

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