Ultrafast Förster transfer dynamics in tetraphenylporphyrin doped poly(9,9-dioctylfluorene)

G. Cerullo, S. Stagira, M. Zavelani-Rossi, S. De Silvestri, T. Virgili, D. G. Lidzey, D. D.C. Bradley

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Abstract

Femtosecond pump-probe spectroscopy was used to directly monitor, in the time domain, energy transfer from the blue-emitting poly(9,9-dioctylfluorene) conjugated polymer to the red-emitting tetraphenylporphyrin molecule. This system is under investigation for use as saturated red light-emitting component in an organic full-color display. The differential transmission spectrum of the system evolves, within a few picoseconds after photoexcitation, from that of the host polymer to that of the guest molecule. Experiments performed at different acceptor concentrations provide clear evidence for a Förster energy transfer mechanism and allow a determination of the interaction radius. A value of 4.2±0.2 nm was found. © 2001 Elsevier Science B.V.
Original languageEnglish (US)
JournalChemical Physics Letters
Volume335
Issue number1-2
DOIs
StatePublished - Feb 16 2001
Externally publishedYes

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