* The blend of Y6-IO2F with P3HT achieved optimal morphology leading to a high power conversion efficiency (PCE) of 10.5% and short-circuit current density of 15.9 mA/cm², outperforming others like P3HT:Y1-IO2F which had a PCE of only 2.2%.
The study developed four new A-DA'D-A acceptors using perylene diimide units, focusing on variations in halogenation and functional group substitutions.
By integrating dithiophenepyrrole units to create fused-hPDI cores, the research enhanced the intramolecular charge transfer, resulting in stronger light absorption.
The best performing organic photovoltaic device used the acceptor FhPDI-IC2F, achieving a power conversion efficiency of 9.0%, mainly due to its superior absorption properties and efficient charge transfer relative to the other tested acceptors.