Role of intermolecular coupling in the photophysics of disordered organic semiconductors: aggregate emission in regioregular polythiophene.
By Jenny Clark, Carlos Silva, R. Friend, F. Spano. Physical Review Letters, 2007
767 citations recorded by the source corpus.
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.
Subfields: Electrical and Electronic Engineering, Polymers and Plastics
View Paper: https://www.semanticscholar.org/paper/c463076ddc16129fbf8200aa7c25f18079b3ddf2
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Citations in the corpus
- P3HT Revisited – From Molecular Scale to Solar Cell Devices (2014, background): “One of the first syntheses of unsubstituted polythiophenes with high conductivity after doping with iodine was reported in 1980 [21, 22].”
- Giant broadband nonlinear optical absorption response in dispersed graphene single sheets (2011, unknown): “This large oscillator strength is characteristic of localization and reminiscent of a polaronic character well known in π-conjugated polymer”