  Organic solar cells are a promising avenue for renewable energy, and our
study introduces a comprehensive model to investigate exciton dissociation
processes at the donor-acceptor interface. Examining quantum efficiency and
emitted phonons in the charge transfer state (CTS), we explore scenarios like
variations of the environment beyond the CTS and repulsive/attractive
potentials. The donor-acceptor interface significantly influences the injection
process, with minimal impact from the environment beyond the CTS. Attractive
potentials can create localized electron states at the interface, below the
acceptor band, without necessarily hampering a good injection at higher
energies. Exploring different recombination processes, including acceptor-side
and donor-side recombination, presents distinct phases in the energy-injection
versus recombination rate. Our study highlights the important role of the type
of recombination in determining the quantum efficiency and the existence of hot
or cold charge transfer states. Finally, depending on the initial energy of the
electron on the donor side, three distinct injection regimes are exhibited. The
present model should be helpful for optimizing organic photovoltaic cell
interfaces, highlighting the critical parameter interplay for enhanced
performance.
