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In this study, a series of polymers (denoted as PTQxFs) were prepared from random copolymers—poly[(5,8-(6,7-difluoro-2,3-dihexylquinoxaline))-alt-(2,5-thiophene)]-ran-[(2,5-(3-dodecylthiophene))-alt-(2,5-thiophene)]—via Pd(0)-catalyzed Stille polymerization using thiophene as the electron-rich unit and 6,7-difluoro-2,3-dihexylquinoxaline as an electron-deficient unit, which is newly synthesized by...
A new accepter unit, 5,6-difluoro-2,2-dimethyl-2H-benzo[d]imidazole, was prepared and utilized for the synthesis of the conjugated polymers containing electron donor–acceptor pair for OPVs. Difluoro-dimethyl-2H-benzoimidazole unit was designed to introduce electron-withdrawing F atom in dimethyl-2H-benzimidazole unit to improve deeper HOMO and higher VOC of the polymer. New semiconducting...
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