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


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Mutlugun E. , Nizamoglu S., Demir H. V.

APPLIED PHYSICS LETTERS, vol.95, no.3, 2009 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 95 Issue: 3
  • Publication Date: 2009
  • Doi Number: 10.1063/1.3182798
  • Title of Journal : APPLIED PHYSICS LETTERS

Abstract

We propose and demonstrate highly efficient nonradiative Foumlrster 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.