Ambipolar organic thin film transistors prepared with a one step solution technique

Abstract

One of the most challenging problems limiting the development of the technology of organic electronics is a lack of simple, solution based, techniques for producing organic thin film transistors (OTFTs) with ambipolar characteristics. In this work, a simple method of manufacturing ambipolar OTFTs, based on a zone-casting technique, is presented. This technique was used to prepare thin and highly oriented films from a combination of the p-type organic semiconductor, TIPS-Pentacene, with one of the two naphthalene bisimide derivatives, both exhibiting electron conductivity. The OTFTs produced with such active layers display ambipolar properties with symmetric characteristics and electron and hole mobility in the best case amounting to: μe=1.5×10−2 and μh=1.1×10−2cm2V−1s−1, respectively.