Efficient Molecular Design for Highly Conductive and Flexible Semiconductors : Poly(3-hexylthiophene) Regioblock Copolymers
발표자
()
초록
내용
The coexistence of flexibility and electrical performance is important for wearable electronic devices. Herein, we demonstrate poly(3-hexylthiophene) regioblock copolymers (block-P3HTs) that show both great electrical and mechanical performance. A series of block-P3HTs were synthesized by the combination of crystalline regioregular block (rre-block) with similar molecular weight (Mn) and flexible regiorandom block (rra-block) with varied Mn, using grignard metathesis. They produced high mobility in all average regioregularity (RRavg), based on high crystallinity and edge-on stacking induced by the rre-block. Meanwhile, rra-block facilitate the crystallization of entire chains resulted in the highest mobility at 87% RRavg rather than 97 % RRavg. Furthermore, the film of block-P3HTs were stretched over 30% strain, while that of pure P3HT is decomposed at 0.3% strain. block-P3HTs is great molecular system in that they enable effective charge transportation under large stretching.