Intramolecular exciton diffusion in poly(3-hexylthiophene)

Andrew T. Healy; Bryan W. Boudouris; C. Daniel Frisbie; Marc A. Hillmyer; David A. Blank

doi:10.1021/jz401694j

Intramolecular exciton diffusion in poly(3-hexylthiophene)

Andrew T. Healy, Bryan W. Boudouris, C. Daniel Frisbie, Marc A. Hillmyer, David A. Blank

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Abstract

Emission quenching by fullerenes covalently attached to both ends of a series of size-selected regioregular poly(3-hexylthiophene) samples was quantified and used to determine the intrachain exciton diffusion length. The diffusion length was found to be L_D = 7.0 ± 0.8 nm. When the distance dependence of the quenching mechanism is considered, this is the same value that has been reported for emissive excitons in thin films. This result indicates that intrachain exciton transport is more facile for excitons localized to single chains than that for excitons that are delocalized between chains. In the context of solar cells, the result indicates additional complexity and the potential for competing issues when considering morphological design of the film to enhance both exciton and charge transport.

Original language	English (US)
Pages (from-to)	3445-3449
Number of pages	5
Journal	Journal of Physical Chemistry Letters
Volume	4
Issue number	20
DOIs	https://doi.org/10.1021/jz401694j
State	Published - Oct 17 2013

Keywords

conjugated polymer
energy transfer
thiophene fullerene triad

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abstract = "Emission quenching by fullerenes covalently attached to both ends of a series of size-selected regioregular poly(3-hexylthiophene) samples was quantified and used to determine the intrachain exciton diffusion length. The diffusion length was found to be LD = 7.0 ± 0.8 nm. When the distance dependence of the quenching mechanism is considered, this is the same value that has been reported for emissive excitons in thin films. This result indicates that intrachain exciton transport is more facile for excitons localized to single chains than that for excitons that are delocalized between chains. In the context of solar cells, the result indicates additional complexity and the potential for competing issues when considering morphological design of the film to enhance both exciton and charge transport.",

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AU - Boudouris, Bryan W.

AU - Frisbie, C. Daniel

AU - Hillmyer, Marc A.

AU - Blank, David A.

PY - 2013/10/17

Y1 - 2013/10/17

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Intramolecular exciton diffusion in poly(3-hexylthiophene)

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