Energy transfer dynamics in polyfluorene-based polymer blends

A. R. Buckley, M. D. Rahn, J. Hill, J. Cabanillas-Gonzalez, A. M. Fox, D. D.C. Bradley

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132 Scopus citations

Abstract

The Förster energy transfer mechanisms in polyfluorene-based polymer blends have been investigated by picosecond time-resolved photoluminescence spectroscopy. Blends of poly(9,9-dioctylfluorene), (F8), and poly(9,9-dioctylfluorene-co-benzothiadiazole), (BT), ranging from 50% to 0.01% BT have been investigated from room temperature down to 12 K. In high concentration BT/F8 films, nearest neighbour transfers from F8 to BT, characterised by an F8 fluorescence lifetime of 12 ps, totally dominate. In low concentration BT/F8 films energy transfer between F8 and BT still occurs at nearest neighbour sites, but exciton migration to these sites amongst F8 chain segments now also contributes to the measured dynamics. © 2001 Elsevier Science B.V.
Original languageEnglish (US)
JournalChemical Physics Letters
Volume339
Issue number5-6
DOIs
StatePublished - May 18 2001
Externally publishedYes

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