Variation of the Side Chain Branch Position Leads to Vastly Improved Molecular Weight and OPV Performance in 4,8-dialkoxybenzo[1,2-b:4,5-b′]dithiophene/2,1,3-benzothiadiazole Copolymers
Scheme 1
Side chain variation in 4,8-dialkoxybenzo[1,2-b:4,5-b′]dithiophene (BDT) 2,1,3-benzothiadiazole copolymers.