Highly efficient nonradiative energy transfer using charged CdSe/ZnS nanocrystals for light-harvesting in solution
Date
2009-07-20
Editor(s)
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
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
Journal Title
Journal ISSN
Volume Title
Series
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.
Course
Other identifiers
Book Title
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