Charge-transfer excitons in strongly coupled organic semiconductors

Abstract

Time-resolved and temperature-dependent photoluminescence measurements on one-dimensional sexithiophene lattices reveal intrinsic branching of photoexcitations to two distinct species: self-trapped excitons and dark charge-transfer excitons (CTX; > 5% yield), with radii spanning 2-3 sites. The significant CTX yield results from the strong charge-transfer character of the Frenkel exciton band due to the large free exciton bandwidth (~400 meV) in these supramolecular nanostructures.

Physical Review B Rapid Communications (In Press)

References in corpus (4)

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• Photophysics of charge-transfer excitons in thin films of π-conjugated polymers
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