H- and J-Aggregate Behavior in Polymeric Semiconductors

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…

• NS
  National Science Foundation

  Awards: 1203811, DMR-1203811
• LT
  Leverhulme Trust
• UD
  Université de Montréal
• NS
  Natural Sciences and Engineering Research Council of Canada
• DO
  Division of Materials Research

  Award: DMR-1203811