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• W2050268081 abstract "The conversion of photoexcitations into charge carriers in organic solar cells is facilitated by the dissociation of excitons at the donor/acceptor interface. The ultrafast timescale of charge separation demands sophisticated theoretical models and raises questions about the role of coherence in the charge-transfer mechanism. Here, we apply two-dimensional electronic spectroscopy to study the electron transfer process in poly(3-hexylthiophene)/PCBM (P3HT/PCBM) blends. We report dynamics maps showing the pathways of charge transfer that clearly expose the significance of hot electron transfer. During this ultrafast electron transfer, vibrational coherence is directly transferred from the P3HT exciton to the P3HT hole polaron in the crystalline domain. This result reveals that the exciton converts to a hole with a similar spatial extent on a timescale far exceeding other photophysical dynamics including vibrational relaxation. Dissociation of excitons at the donor/acceptor interface in organic solar cells occurs on fast timescales. Here, the authors apply two-dimensional electronic spectroscopy to study the electron transfer process in a polymer blend, reporting dynamic maps for the charge-transfer pathways." @default.
• W2050268081 created "2016-06-24" @default.
• W2050268081 creator A5029838157 @default.
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• W2050268081 date "2014-09-12" @default.
• W2050268081 modified "2023-10-02" @default.
• W2050268081 title "Vibrational coherence probes the mechanism of ultrafast electron transfer in polymer–fullerene blends" @default.
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• W2050268081 doi "https://doi.org/10.1038/ncomms5933" @default.
• W2050268081 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25215959" @default.
• W2050268081 hasPublicationYear "2014" @default.
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