Journal
CHEMICAL PHYSICS LETTERS
Volume 372, Issue 3-4, Pages 403-408Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0009-2614(03)00419-6
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A quantum chemical semiempirical investigation of electron-vibrational dynamics of photoexcited conjugated polyfluorenes shows that delocalized electronic excitations dominate the absorption, whereas chemical defects (if present) dramatically impact the emission by trapping the photogenerated exciton into a localized state and acting as guest emitters at recombination. These results offer theoretical insight into the effect of non-quenching defect sites in conjugated polymers and explain the origin of a controversial low energy emission band frequently observed in bulk polyfluorene samples. (C) 2003 Elsevier Science B.V. All rights reserved.
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