“…When appliedi nt he OTFTs, 74 showedaunipolar m e,OTFT of 0.24 cm 2 V À1 s À1 after annealing at 200 8Ca nd 73 exhibited an increased m e,OTFT of 0.42 cm 2 V À1 s À1 with ah igh I on /I off ratio of 10 5 -10 6 .A ll-PSC cells were fabricated by using the D1:73 blend as the active layer and showed a PCE of 1.82 %. [84] Jiang and our group independently developed af used diimide electron-deficient unit, dithienylbenzodiimide (TBDI), in which ac entral phenyl ring was fused with two adjacent thiophenesf eaturing imide-containingh eptacyclic rings. [85] When copolymerized with various donor co-units, such as thiophene, bithiophene, difluorobithiophene, as eries of polymer semiconductors, 75, 76,a nd 77,w ere synthesized with low-lying LUMOs in the range of approximately À3.65 to À3.78 eV, [a] Opticalb and gap estimated from the absorptiononset of thin films.…”