Effect of Thieno[3,2-b]thiophene π-bridge on photovoltaic performance of a D-A copolymer of alkoxy-benzodithiophene-alt-fluoro-benzotriazole

Molecular structure of the D-A copolymer J41 with thieno[3,2-b]thiophene (TT) π-bridges and the typical J-V curves of the PSCs based on J41: ITIC under the illumination of AM1.5G, 100 mW cm−2.190