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Annual Review of Physical Chemistry

Volume 65, 2014

H- and J-Aggregate Behavior in Polymeric Semiconductors

Abstract

Aggregates of conjugated polymers exhibit two classes of fundamental electronic interactions: those occurring within a given chain and those occurring between chains. The impact of such excitonic interactions on the photophysics of polymer films can be understood using concepts of J- and H-aggregation originally developed by Kasha and coworkers to treat aggregates of small molecules. In polymer assemblies, intrachain through-bond interactions lead to J-aggregate behavior, whereas interchain Coulombic interactions lead to H-aggregate behavior. The photophysics of common emissive conjugated polymer films are determined by a competition between intrachain, J-favoring interactions and interchain, H-favoring interactions. We review formalisms describing absorption and photoluminescence lineshapes, based on intra- and intermolecular excitonic coupling, electron-vibrational coupling, and correlated energetic disorder. Examples include regioregular polythiophenes, pheneylene-vinylenes, and polydiacetylene.

Keyword(s): conjugated polymers, H-aggregates, J-aggregates
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2014-04-01
2024-04-26
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H- and J-Aggregate Behavior in Polymeric Semiconductors
Annual Review of Physical Chemistry 65, 477 (2014); https://doi.org/10.1146/annurev-physchem-040513-103639
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