| 초록 |
The high field-effect mobility and solution processability of polythiophene, a member of the most studied family of conducting polymers, have stimulated considerable interest in its utilizing in organic transistors. However, the charge-carrier mobilities of solution-processed conjugated polymer films are generally limitied by the hopping process between polymer chains in disordered regions of the material because of their low crystallinity. It is because of the very fast solvent evaporation rate during film formation, which is a kinetically unfavorable condition for crystal growth. In this study we have developed a casting method via spin-coating time control. With the short spinning time, the resulting polythiophene thin film adopt a highly ordered nanowire structures with a field-effect mobility dramatically improved. By combining the advantages of the conventional spin-casting and drop-casting methods, we were able to produce polymer thin film with high crystallinity and uniformity. |
