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- W1987606475 abstract "Exciton delocalization has been proposed to have a strong impact on the performance of organic solar cells. For example, large exciton delocalization estimates have promoted the theory of long-range charge transfer as a mechanism for efficient charge separation. Here, two new computational modeling techniques for analyzing femtosecond transient absorption spectroscopy experiments are developed in order to estimate the magnitude of exciton delocalization in semiconducting polymers. The developed techniques are then used to analyze previously published experimental data for regioregular poly(3-hexylthiophene) (P3HT). Based on modeling both the exciton–exciton annihilation behavior in a pure P3HT film and the exciton dissociation dynamics in a P3HT:PCBM blend film, the exciton delocalization radius in regioregular P3HT is estimated to be in the range of 1–2 nm, which is significantly smaller than estimated in a number of previous studies. These results suggest that exciton delocalization is not likely to be a significant contributing factor to efficient charge separation." @default.
- W1987606475 created "2016-06-24" @default.
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- W1987606475 date "2013-10-09" @default.
- W1987606475 modified "2023-10-16" @default.
- W1987606475 title "Estimating the Magnitude of Exciton Delocalization in Regioregular P3HT" @default.
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- W1987606475 doi "https://doi.org/10.1021/jp403396v" @default.
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