Energy transfer and exciplex formation and their impact on exciton and charge carrier dynamics in organic films

Whitney E.B. Shepherd, Andrew D. Platt, Mark J. Kendrick, Marsha A. Loth, John E. Anthony, Oksana Ostroverkhova

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

We report Förster resonant energy transfer (FRET) with a Förster radius R0 of 4.8 nm and exciplex formation in composites containing two functionalized anthradithiophene (ADT) derivatives, ADT-TES-F (donor, D) and ADT-TIPS-CN (acceptor, A) depending on the D-A distance. In composites containing bulk D/A heterojunctions, exciplex photoluminescence (PL) emission peaked at ∼668 nm dominated the PL spectra. The exciplex contributed to charge carrier photogeneration on nanosecond time scales in composites, in contrast to sub-500 ps carrier photogeneration observed in ADT-TES-F pristine films. Finally, significantly slower charge carrier recombination was obtained in composites, as compared to that of pristine ADT-TES-F films, due to electron trapping at the ADT-TIPS-CN enabling the hole to propagate in the ADT-TES-F host.

Original languageEnglish
Pages (from-to)362-366
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume2
Issue number5
DOIs
StatePublished - Mar 3 2011

ASJC Scopus subject areas

  • Materials Science (all)
  • Physical and Theoretical Chemistry

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