| 초록 |
Long-range alignment of conjugated polymers is essential for achieving efficient charge transport in polymer films used in electronics devices. Here, we report a scalable strategy that enables large-scale alignment of polymer semiconductor nanowires (NWs) with highly enhanced charge carrier mobility, using a modified controlled evaporative self-assembly (MCESA) technique. Organic field-effect transistors (OFETs) based on highly aligned poly(3-hexylthiophene) (P3HT)-NW films exhibit a remarkable 10-fold enhancement in charge carrier mobility as compared to the pristine P3HT films. The motion rate of the meniscus was revealed to profoundly influence the molecular ordering and charge transport characteristics of the aligned NW films. Significantly, large-area aligned P3HT-NW films resulted in lower device performance variation (i.e., standard deviation ≅ 0.0172 (16%) cm2 V-1 s-1) as well as an excellent average device performance (i.e., average charge mobility ≅ 0.11 cm1 V-1 s-1). |
