Interface Modification in Organic Thin Film Transistors

Abstract

The octadecyltrichlorosilane (OTS) solutions with three solvents, hexadecane, toluene, and ethanol, were acted as the interface chemical modifiers to advance the characteristics of organic thin-film transistors (OTFTs). The electrical characteristics of the organic thin-film transistors with modification were obviously enhanced, especially in mobility, on/off current ratio and subthreshold slope. From the data of X-ray diffraction (XRD), contact angle and atomic force microscope (AFM) measurement, it could be understood that the quality of the organic thin film had been improved due to the change of silicon dioxide surface energy. In this report, the best device was been treated in the OTS/toluene or hexadecane solutions with 1% volume concentration.