New record: Over 16 percent efficiency for single-junction organic solar cells

Two non-fullerene acceptors, namely BTPT-4F and BTPTT-4F, were selected to match with a wide-bandgap polymer donor P2F-EHp consisting of an imide-functionalized benzotriazole moiety, as these materials presented complementary absorption and well-matched energy levels. By delicately optimizing the blend film morphology, an unprecedented power conversion efficiency of over 16% was achieved for the device based on P2F-EHp:BTPTT-4F, suggesting the great promise of materials matching toward high-performance OSCs.