  The minimum driving force strategy is applied to promote the exciton
dissociation in organic solar cells (OSCs) without significant loss of
open-circuit voltage. However, this strategy tends to promote F\"orster
resonance energy transfer (FRET) from the donor to the acceptor (D-A), a
consequence generally ignored until recently. In spite of the advances reported
on this topic, the correlation between charge-transfer (CT) state binding
energy and driving force remains unclear, especially in the presence of D-A
FRET. To address this question, we employ a kinetic approach to model the
charge separation in ten different D/A blends using non-fullerene acceptors.
The model considers the influence of FRET on photoluminescence (PL) quenching
efficiency. It successfully predicts the measured PL quenching efficiency for D
or A photoexcitation in those blends, including the ones for which the D-A FRET
process is relevant. Furthermore, the application of the model allows to
quantifying the fractions of quenching loss associated with charge transfer and
energy transfer. Fundamental relationships that controls the exciton
dissociation was derived evidencing the key roles played by the Marcus inverted
regime, exciton lifetime and mainly by the correlation between the driving
force and binding energy of CT state. Based on those findings, we propose some
strategies to maximize the quenching efficiency and minimize energy loss of
OSCs in the presence of D-A FRET.
