Abstract
We fabricated perylene-based organic thin-film transistor (OTFT) with an octadecyltrichlorosilane (OTS) monolayer in an ultrahigh vacuum condition. By current–voltage characteristics, the saturation current and the field effect mobility of OTS–OTFT (gold∕perylene∕OTS∕SiO2∕p+-Si) increased over ∼100 times in comparison with normal-OTFT (gold∕perylene∕SiO2∕p+-Si), and on/off ratio increased over ∼100 times. The saturation current, field effect mobility, and on/off ratio were >1μA, 0.042cm2∕Vs, and >106, respectively. The uniformity of the OTS layer was confirmed by x-ray reflectivity. Perylene thin films on SiO2 and OTS∕SiO2 were compared by atomic force microscopy, scanning electron microscopy, x-ray diffraction, and x-ray photoscopy.
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