| 초록 |
Unlike the solvent drop casting, typical film deposition method such as spin-coating, which can be used to produce large-scale homogeneous film, cannot be used to produce ordered structures because of the fast solvent evaporation rate during film formation. In this study with the aim of enhancing the charge transport of polythiophene by promoting molecular ordering, we have developed a casting method via spin-coating time control. By manipulating the spinning time, it is possible to regulate the solvent evaporation rate of solution, which in turn improved the crystallinity of polythiophene thin films. With the short spinning time, the resulting polythiophene thin film adopt a ordered nanowire structures with a field-effect mobility improved by a factor of 10 depending on the spin time. By combining the advantages of the conventional spin-casting and drop-casting methods, we were able to produce semiconducting polymer thin film with high crystallinity and uniformity. |
