| 초록 |
We have investigated π-conjugation extendibility of various conjugated polymers with well-defined structures and molecular weights. Self-assembled crystal nanostructures of these conjugated polymers in films showed rods, fibrils to percolated layers, depending on the backbone/side chains and film procedures, and the π-conjugated structures were systematically characterized. Additionally, electrical properties of the polymer-based organic field-effect transistors (OFETs) supported that the both intra- and inter-molecular π-conjugation of these polymers plays an important role in yielding better charge transport. Among these conjugated polymers, diketopyrrolopyrrole-based copolymers could develop highly percolated, conjugated layers on gate dielectrics, and the corresponding films showed high field-effect mobility up to 6 cm²/Vs in OFETs. |
