| 초록 |
Organic semiconductors have been intensively studied in recent decades as potential alternatives to conventional inorganic semiconductors for low-cost, large-area, and flexible electronics applications. In the area of organic field-effect transistors (OFETs), π-conjugated assembly of organic semiconductors plays an important role in maximizing long-distance charge transfer. Depending on film processing conditions, crystalline structures on dielectric substrates are significantly changed, resulting in very different field-effect mobilities in OFET devices. Here, the crystalline structures of organic semiconducting films, which were fabricated by either vacuum- or solution-processing methods, were investigated by using grazing-incidence X-ray diffraction, as well as atomic force microscopy. Based on these analyses, we could successively correlate electric performance of the resulting OFET devices with the π-conjugated structures. |
