Spectrally resolved dynamics of energy transfer in quantum-dot assemblies

Towards engineered energy flows in artificial materials

S. A. Crooker, J. A. Hollingsworth, S. Tretiak, Victor I Klimov

Research output: Contribution to journalArticle

549 Citations (Scopus)

Abstract

The strength of Forster coupling between CdSe nanocrystal quantum dots (NQDs) via dynamical studies of energy transfer (ET) in close-packed assemblies of mondisperse and mixed-size samples, and a prototype "energy gradient" bilayer structure was evaluated. Through time-resolved and spectrally resolved photoluminescence (PL) dynamics, a fast PL decay on the blue side of the emission band which was dominated by Forster transfer was observed, providing a direct measure of ET efficiency. This observation agrees with the known band-edge structure in CdSe NQDs, wherein a large energy gap separates the lowest emitting transition from the higher-lying strongly absorbing transitions.

Original languageEnglish
JournalPhysical Review Letters
Volume89
Issue number18
Publication statusPublished - Oct 28 2002

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assemblies
nanocrystals
energy transfer
quantum dots
photoluminescence
prototypes
gradients
energy
decay

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Spectrally resolved dynamics of energy transfer in quantum-dot assemblies : Towards engineered energy flows in artificial materials. / Crooker, S. A.; Hollingsworth, J. A.; Tretiak, S.; Klimov, Victor I.

In: Physical Review Letters, Vol. 89, No. 18, 28.10.2002.

Research output: Contribution to journalArticle

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