  We demonstrate that charge separation at donor-acceptor interfaces is a
complex process that is controlled by the combined action of Coulomb binding
for electron-hole pairs and partial relaxation due to quantized phonons. A
joint electron-vibration quantum dynamical study reveals that high energy
vibrations sensitively tune the charge transfer probability as a function of
time and injection energy, due to polaron formation. These results have
bearings for the optimization of energy transfer both in organic and quantum
dot photovoltaics, as well as in biological light harvesting complexes.
