Ternary polymer solar cells based-on two polymer donors with similar HOMO levels and an organic acceptor with absorption extending to 850 nm

A ternary non-fullerene polymer solar cell based-on two polymer donor (J51, PTB7-Th) and a narrow bandgap n-OS acceptor BT-IC was fabricated and the devices demonstrated higher power conversion efficiency of 10.32% with a high short circuit current density of 19.55 mA cm−2.288