TY - JOUR
T1 - Phonon-driven ultrafast exciton dissociation at donor-acceptor polymer heterojunctions
AU - Tamura, Hiroyuki
AU - Ramon, John G.S.
AU - Bittner, Eric R.
AU - Burghardt, Irene
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2008/3/12
Y1 - 2008/3/12
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.100.107402
DO - 10.1103/PhysRevLett.100.107402
M3 - Article
AN - SCOPUS:40849142297
VL - 100
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 10
M1 - 107402
ER -