Suppressed Non-Radiative Loss and Efficient Hole Transfer at Small Highest Occupied Molecular Orbital Offset Enables 19.73% Efficiency Binary Organic Solar Cells with Small Efficiency-Cost Gap

Suppressing energy/voltage loss and realizing efficient charge transfer at small frontier molecular orbital offsets between donor and acceptor is viable to simultaneously improve open-circuit voltage (Voc) and short-circuit current (Jsc),...