“…The band gap of conjugated polymers can be effectively tuned by a design approach through donor-acceptor interactions [36] , we choose benzodithiophene (BDT) as a donor due to its excellent electron donating ability and triazoloquinoxaline (TaQX) as the acceptor due to the exclusively electron-deficient backbones. Polymer (benzo[1,2-b:4,5-b']dithiophene,4,8-bis[5-(2-ethylhexyl)− 2-thienyl]− 2,6-diyl)-co-( [1] , [2] , [3] triazolo[3,4- g ]quinoxaline,6,7-bis[3-trifluoromethyl-4-[(2-ethylhexyl)oxy] phenyl]− 4,9-diyl) (PBDT-TaQX, Fig.…”