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Zarifi Masri, Arvydas Ruseckas, Evguenia V. Emelianova, Linjun Wang, Ashu K. Bansal, Andrew Matheson, Henrik T. Lemke, Martin M. Nielsen, Ha Nguyen, Olivier Coulembier, Philippe Dubois, David Beljonne and Ifor D. W. Samuel Molecular Weight Dependence of Exciton Diffusion in Poly(3-hexylthiophene) Advanced Energy Materials 3

Version of Record online: 6 AUG 2013 | DOI: 10.1002/aenm.201300210

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Singlet exciton diffusion in poly(3-hexylthiophene) (P3HT) is studied using a combination of experimental and theoretical methods. It is shown that exciton diffusion is faster along the co-facial ππ aggregates than between them. The fastest exciton diffusion is observed for intermediate molecular weight polymers and it correlates with the degree of chromophore aggregation and with exciton delocalization along the polymer chain.

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