| 초록 |
We report a strategy to improve the charge carrier transport of conjugated polymers. This strategy involved increasing connectivity between polymer chains by forming localized aggregates in amorphous regions. A series of random copolymers were synthesized using different monomer feed ratios to control the density of hexyl side chains, which play an important role in molecular−molecular interaction. The crystallinity decreased with the reduction of the side chains density concomitant with the increase in structural irregularity. Interestingly, RP33, which exhibited the lowest crystallinity, showed a greatly enhanced field-effect mobility compared with the high-crystallinity P3HT, reaching 1.37 cm2/(V·s). This enhancement is attributed to the increased backbone planarity and the existence of localized aggregates in amorphous regions, giving rise to enhanced intra and interchain charge transport, respectively. |
