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arXiv · 0910.2515

Charge-transfer excitons in strongly coupled organic semiconductors

Jean-Francois Glowe·Mathieu Perrin·David Beljonne·Sophia C. Hayes·Fabrice Gardebien·Carlos Silva
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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.

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Jean-Francois Glowe, Mathieu Perrin, David Beljonne, Sophia C. Hayes, Fabrice Gardebien, Carlos Silva. 2009-12-15. Charge-transfer excitons in strongly coupled organic semiconductors. https://doi.org/10.1103/physrevb.81.041201

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