arxiv: 0910.2515 · v2 · submitted 2009-10-14 · ❄️ cond-mat.mtrl-sci · cond-mat.mes-hall

Charge-transfer excitons in strongly coupled organic semiconductors

Jean-Francois Glowe , Mathieu Perrin , David Beljonne , Sophia C. Hayes , Fabrice Gardebien , Carlos Silva This is my paper

classification ❄️ cond-mat.mtrl-sci cond-mat.mes-hall

keywords charge-transferexcitonsexcitonyieldbandbandwidthbranchingcharacter

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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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Charge-transfer excitons in strongly coupled organic semiconductors

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