The effects of simultaneous treatment of SiO 2 gate and Au electrode with octadecyltrichlorosilane and charge transfer molecules on characteristics of pentacene thin film transistors

Abstract

We investigated the effects of treatment with octadcyltrichlorosilane (OTS) and the charge transfer molecules (CTM) such as 2-mercapto 5-nitrobenzimidazole (MNB), 2-mercapto benzoxazole (MBX), 2-mercapto benzthiazole (MBT), and 2-mercapto 5-methylbenzimidazole (MMB) on SiO 2 and Au electrode on pentacene organic thin film transistors (OTFTs). Especially for improvement of the mobility and the contact resistance at the same time, we simultaneously treated SiO 2 and Au electrode with OTS, MNB, and MBX. As the results, we could improve the mobility to 0.2 cm 2/V s and reduce the contact resistance to 50 kΩ, corresponding to 10 times larger than the untreated OTFTs.