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An analytical model of quenching of steady-state photoluminescence (PL) via F\"orster resonant energy transfer (FRET) in blends of a conjugated polymer and low-molecular energy acceptors is presented. The normalized PL intensity as an analytical function of acceptor concentration is obtained in the case of homogeneous polymer-acceptor blend. This function has only two parameters depending on the F\"orster radii of energy transfer between the polymer conjugated segments (intrapolymer) and between a conjugated segment and an energy acceptor. The intrapolymer exciton migration can enhance PL quenching up to 60% as derived as an asymptote of the model. The model excellently fits the experimental data on quenching of soluble polyphenylenevinylene PL in blends with trinitrofluorenone.
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Zapunidi et al. (2009) studied this question.
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