INVESTIGATION OF POLYMER SOLAR CELL EFFICIENCY THROUGH THE ADDITION OF A POLYMER SOLUTION TO THE PM6 DONOR
In this study, a liquid-crystalline tetrafluorophenyl azide (PFFA) polymer was incorporated as an additive into the PM6:L8-BO donor/acceptor blend, specifically into the donor component PM6, achieving enhanced morphology and higher efficiency. This modification broadened the optical absorption spectrum of the active layer, increasing the probability of photon absorption and generating more photoinduced charge carriers (electrons and holes). The suppression of interfacial recombination processes and the improvement of charge carrier mobility led to an increase in the fill factor (FF) up to 79.4%. As a result of the improved photovoltaic parameters (Jsc, Voc, FF) of the polymer solar cells (PSCs), the power conversion efficiency (PCE) increased from 17.7% to 18.2%.
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