Phonon-driven ultrafast exciton dissociation at donor-acceptor polymer heterojunctions

Hiroyuki Tamura, John G.S. Ramon, Eric R. Bittner, Irene Burghardt

    Research output: Contribution to journalArticlepeer-review

    86 Citations (Scopus)

    Abstract

    A quantum-dynamical analysis of exciton dissociation at polymer heterojunctions is presented, using a hierarchical electron-phonon model parametrized for three electronic states and 28 vibrational modes. Two representative interfacial configurations are considered, both of which exhibit an ultrafast exciton decay. The efficiency of the process depends critically on the presence of intermediate bridge states, and on the dynamical interplay of high- vs low-frequency phonon modes. The ultrafast, highly nonequilibrium dynamics is consistent with time-resolved spectroscopic observations.

    Original languageEnglish
    Article number107402
    JournalPhysical review letters
    Volume100
    Issue number10
    DOIs
    Publication statusPublished - 2008 Mar 12

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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