Air?Processed Efficient Organic Solar Cells from Aromatic Hydrocarbon Solvent without Solvent Additive or Post?Treatment: Insights into Solvent Effect on Morphology

Most of the recent organic solar cells (OSCs) with top-of-the-line efficiencies are processed from solvents a high vapor pressure such as CF in nitrogen-filled glovebox, which is not feasible for large-area manufacturing. Herein, we cast active layers both aromatic hydrocarbon and halogenated without any solvent additive or post-treatment, well interlayers water methanol air (35% relative humidity) efficient OSCs, except cathode electrode's evaporation vacuum. Compared to PM6:Y6 system that CF, PM6:BTP-ClBr2 demonstrates good efficiency 16.28% CB device based on PM6:BTP-4Cl achieves 16.33% using TMB its layer. These among highest CB- TMB-processed binary OSCs date. The molecular packing phase separation length scales each combination depend strongly solvent, overall morphology result interplay between (kinetics) materials miscibility (thermodynamics). Different required realize optimal due different donor acceptor. Finally, 17.36% was achieved by incorporating PC71BM devices. Our provides insights into effect processing shows potential realizing high-performance conditions relevant industrial fabrication.