Dynamics of Förster transfer in polyfluorene-based polymer blends and Langmuir-Blodgett nanostructures

J. Hill, S. Y. Heriot, O. Worsfold, T. H. Richardson, A. M. Fox, D. D.C. Bradley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

25 Scopus citations

Abstract

We have studied the Förster transfer dynamics in spin-cast polyfluorene blends and Langmuir-Blodgett (LB) nanostructures by time-resolved photoluminescence (PL) spectroscopy. The blend system consisted of poly(9,9-dioctylfluorene) (F8) as the host and poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) as the guest. In the spin-cast films we find evidence for phase separation at high F8BT concentrations. In the LB nanostructures, the host-guest separation is precisely controlled by optically-inert monolayer spacers of stearic acid. This permits a quantitative analysis of the Förster transfer dynamics, from which we deduce a value of 38±7Å for the Förster radius of the F8-F8BT system, in agreement with the predictions based on spectral overlap calculations. © 2003 Elsevier Science B.V. All rights reserved.
Original languageEnglish (US)
Title of host publicationSynthetic Metals
DOIs
StatePublished - Oct 9 2003
Externally publishedYes

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