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
Figure 4
(a) Integrated powder diffraction patterns for P1 (black), P2 (blue), and P3 (red). Inset: 10 frames added together for P3. (b) Model of packing for P3.