| 초록 |
Long-range alignment of conjugated polymers is as critical as polymer chain packing for achieving efficient charge transport in polymer thin films used in electronic devices. Here, we report a scalable strategy that enables the deposition of macroscopically aligned polymer nanowire (NW)-array films with highly enhanced charge carrier mobility, using a modified controlled evaporative self-assembly (MCESA) technique. The OFETs based on highly oriented P3HT NW-films exhibited a more than 10-fold enhancement in the carrier mobility, with the highest mobility of 0.13 cm2 V-1 s-1, compared to the OFETs based on pristine P3HT films. Significantly, the large-area aligned P3HT NW-films, which were deposited over 12 arrays by the MCESA coating, result in an excellent average device performance (i.e., average charge mobility ≈ 0.11 cm2 V-1 s-1) with a low variation (i.e., standard deviation ≈ 0.0172 (16 %) cm2 V-1 s-1) overcoming a critical challenge in the field of OFETs. |
