Asymmetric Acceptors with Fluorinated and Chlorinated End-Groups Enabling Organic Solar Cells with Approaching 19% Efficiency and High Thickness-Tolerance

Asymmetric non-fullerene acceptors (NFAs) play a crucial role in improving the power conversion efficiency (PCE) of organic solar cells (OSCs). Herein, monophenyl derivatives substituted quinoxaline served as the central core...