Abstract
Photoinduced infrared absorption spectra of poly( p-phenylene) and poly(2,5-dioctyloxy- p-phenylenevinylene) have been measured by the phase–modulation technique. The modulation-frequency dependencies of the intensity and the phase delay of the photoinduced infrared absorptions have been obtained. The observed modulation-frequency dependencies have been numerically simulated on the basis of a model consisting of a bimolecular recombination of the positive and negative polarons that are formed from a photogenerated polaron pair (interchain charge-transfer exciton). The rate constant of the bimolecular recombination process has been obtained.
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