| 초록 |
We demonstrate a facile solution-processing approach to well-ordered nanofibrillar structures of conjugated polymers using a non-solvent vapor treatment, which results in an improvement to the charge carrier mobility of the polymers. The amount of crystalline poly(3-hexylthiophene) (P3HT) nanofibers was precisely controlled by simply varying the exposure time of P3HT solutions to non-solvent vapor. The effects of non-solvent vapor exposure on the molecular ordering and morphologies of the resultant P3HT films were systematically investigated using UV-vis spectroscopy, polarized optical microscopy, grazing incidence X-ray diffraction, and atomic force microscopy. The non-solvent vapor facilitated the π–π stacking in P3HT to minimize unfavorable interactions between the poor solvent molecules and P3HT chains. P3HT films deposited from the non-solvent vapor-treated P3HT solutions exhibited a 5.6-fold improvement in charge carrier mobility as compared to that of pristine P3HT films. |
