Ternary organic solar cells based on polymer donor, polymer acceptor and PCBM components

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In this work, tary organic solar cells (OSCs) combining a fullerene derivative PC71BM with a non-fullerene acceptor N2200-F blended with a polymer donor PM6 were reported. Compared with the binary systems, the highest power conversion efficiency (PCE) of 8.11%was achieved in tary solar cells with30wt%N2200-Fcontent,mainlyduetotheimprovedshort-circuitcurrent density(Jsc)andfillfactor (FF).Furtherstudies showedthattheimprovedJsccouldattributetothecomplementaryabsorptionofthe two acceptors and the enhanced FF was originated from the higher hole mobility and the fine-tuned morphology in the tary system. These results demonstrate that the combination of fullerene and non-fullerene acceptors in tary organic solar cells is a promising approach to achieve high-performance OSCs.
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