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

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    Genre
    Journal Article
    Date
    2007-05-17
    Author
    Clark, J
    Silva, C
    Friend, RH
    Spano, FC
    Subject
    cond-mat.mtrl-sci
    cond-mat.mtrl-sci
    cond-mat.soft
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/6099
    
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    DOI
    10.1103/PhysRevLett.98.206406
    Abstract
    We address the role of excitonic coupling 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, of approximately 5 and 30 meV for films spun from isodurene and chloroform solutions, respectively. © 2007 The American Physical Society.
    Citation to related work
    American Physical Society (APS)
    Has part
    Physical Review Letters
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    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.34944/dspace/6081
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