The role of intermolecular coupling in the photophysics of disordered organic semiconductors: Aggregate emission in regioregular polythiophene

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We address the role of excitonic coulping on the nature of photoexcitations in the conjugated polymer regioregular poly(3-hexylthiophene). By means of temperature-dependent absorption and photoluminescence spectroscopy, we show that optical emission is overwhelmingly dominated by weakly coupled H-aggregates. The relative absorbance of the 0-0 and 0-1 vibronic peaks provides a powerfully simple means to extract the magnitude of the intermolecular coupling energy, approximately 5 and 30 meV for films spun from isodurene and chloroform solutions respectively.
10 pages, 4 figures, published in Phys. Rev. Lett

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Materials Science, Soft Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/129064

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0702663
 http://arxiv.org/abs/cond-mat/0702663
 Phys. Rev. Lett. 98, 206406 (2007)
 doi:10.1103/PhysRevLett.98.206406

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