  It is thought that nature already exploits quantum mechanical properties to
increase the efficiency of solar energy harvesting devices. So, the operation
of these devices can be enhanced by clever design of a nanoscopic, quantum
mechanical system where the quantum coherence plays a crucial role in this
process. In this investigation, we develop a donor-acceptor two-level trap
dipole model converging the key role of quantum coherence and aggregation
effects along with different initial states. Our analysis reveals that
quenching unwanted emissions is achievable by preparing the system in specific
initial state under the effect of optimal spatial aggregation. Interestingly it
is observed that characterizing aggregation-induced properties and quantum
effects of bandgap engineering can increase the power enhancement up to 35.87%
compared with classical counterparts. This encouraging trend suggests a
promising novel design aspect of nature-mimicking photovoltaic devices.
