Mapping emissive channels of quantum dots: Influence of size and environment on energy transfer in the time domain

E. Faulques, F. Massuyeau, Q. Wang, D. K. Seo, S. Jobic

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Abstract

In the quantum confinement regime, the time-resolved photoluminescence mapping of CdSe nanocrystals reveals unusual size-dependent characteristics in solute or solid-state environments. The former case typifies long-lived intradot exciton recombinations, while in the latter energy-dependent Kohlrausch relaxations quench luminescence via interdot energy transfer. The observed energy transfer rate increases for larger size (1.5× 108 s -1 for d=2.5 nm and 6.4× 108 s-1 for d=10 nm).

Original languageEnglish
Article number153111
JournalApplied Physics Letters
Volume97
Issue number15
DOIs
Publication statusPublished - Oct 11 2010

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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