By utilizing two widely used high-boiling, non-halogenated green solvents鈥攐-xylene (o-XY) and toluene (Tol) 鈥攊n the fabrication of PM6: L8-BO, we achieve power conversion efficiencies (PCEs) of 18.20% and 17.36%, respectively. Additionally, a module fabricated with o-XY demonstrates ...