Controlling exciton diffusion and fullerene distribution in photovoltaic blends by side chain modification

Journal article

Sajjad, T, Ward, Alexander J, Kästner, Christian, Ruseckas, Arvydas, Hoppe, Harald and Samuel, Ifor DW (2015). Controlling exciton diffusion and fullerene distribution in photovoltaic blends by side chain modification. The journal of physical chemistry letters. 6 (15), pp. 3054-3060. https://doi.org/10.1021/acs.jpclett.5b01059
AuthorsSajjad, T, Ward, Alexander J, Kästner, Christian, Ruseckas, Arvydas, Hoppe, Harald and Samuel, Ifor DW
Abstract

The influence of crystallinity on exciton diffusion and fullerene distribution was investigated by blending amorphous and semicrystalline copolymers. We measured exciton diffusion and fluorescence quenching in such blends by dispersing fullerene molecules into them. We find that the diffusion length is more than two times higher in the semicrystalline copolymer than in the amorphous copolymer. We also find that fullerene preferentially mixes into disordered regions of the polymer film. This shows that relatively small differences in molecular structure are important for exciton diffusion and fullerene distribution.

Year2015
JournalThe journal of physical chemistry letters
Journal citation6 (15), pp. 3054-3060
PublisherAmerican Chemical Society (ACS)
ISSN1948-7185
Digital Object Identifier (DOI)https://doi.org/10.1021/acs.jpclett.5b01059
Publication dates
Print06 Aug 2015
Online22 Jul 2015
Publication process dates
Accepted09 Jul 2015
Deposited05 Feb 2020
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