Charge-Transfer Dynamics in the Lowest Excited State of a Pentacene–Fullerene Complex: Implications for Organic Solar Cells

Saju Joseph, Mahesh Kumar Ravva, Jean-Luc Bredas

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

We characterize the dynamic nature of the lowest excited state in a pentacene/C60 complex on the femtosecond time scale, via a combination of ab initio molecular dynamics and time-dependent density functional theory. We analyze the correlations between the molecular vibrations of the complex and the oscillations in the electron-transfer character of its lowest excited state, which point to vibration-induced coherences between the (pentacene-based) local-excitation (LE) state and the complex charge-transfer (CT) state. We discuss the implications of our results on this model system for the exciton-dissociation process in organic solar cells.
Original languageEnglish (US)
Pages (from-to)5171-5176
Number of pages6
JournalThe Journal of Physical Chemistry Letters
Volume8
Issue number20
DOIs
StatePublished - Oct 9 2017

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