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

89 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
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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