| 초록 |
Charge transport in π-conjugated polymer films involves π-π interactions within or between polymer chains. Here, we demonstrate a facile solution processing strategy that can provide homogenous crystalline morphology (i.e., strong π-π interactions) commensurate with efficient charge transport. In the solution processing, a small amount of a good solvent additive with high boiling point was introduced into a majority good solvent with low boiling point, and then facilitated the self-assembly of polymer chains into the crystalline fibrillar nanostructures during film formation. The morphology of resultant films was investigated by means of atomic force microscopy and polarized optical microscopy, and quantitative analysis of intra- and intermolecular ordering of polymer chains was performed by static absorption spectroscopy, quantitative modeling, and X-ray diffraction. The charge carrier mobility was evaluated by measuring the current in an organic field effect transistor. |
