Highly efficient nonradiative energy transfer using charged CdSe/ZnS nanocrystals for light-harvesting in solution

Date
2009-07-20
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Source Title
Applied Physics Letters
Print ISSN
0003-6951
Electronic ISSN
Publisher
American Institute of Physics
Volume
95
Issue
3
Pages
033106-1 - 033106-3
Language
English
Type
Article
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Abstract

We propose and demonstrate highly efficient nonradiative Förster resonance energy transfer (FRET) facilitated by the use of positively charged CdSe/ZnS core-shell nanocrystals (NCs) for light-harvesting in solution. With rhodamine B dye molecules used as the acceptors, our time-resolved photoluminescence measurements show substantial lifetime modifications of these amine-functionalized NC donors from 18.16 to 1.88 ns with FRET efficiencies >90% in solution. These strong modifications allow for light-harvesting beyond the absorption spectral range of the acceptor dye molecules.

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Keywords
CdSe/ZnS, Core-Shell Nanocrystals, Dye molecule, Functionalized, Light-harvesting, Non-radiative, Nonradiative energy transfer, Positively charged, Resonance energy transfer, Rhodamine B dye, Spectral range, Time-resolved photoluminescence, Amines, Energy transfer, Nanocrystals, Harvesting
Citation
Published Version (Please cite this version)