Polymer/Silicon Nanoparticle Hybrid Layer as High-k Dielectrics in Organic Thin-Film Transistors

In this work, a novel organic/inorganic hybrid dielectric material containing silicon nanoparticle had been designed and synthesized for using in organic thin-film transistors (OTFTs). Also, the inorganic silicon nanoparticle was modified by 2-hydroxyethyl methacrylate to completely disperse in organic polymers. The film made of these materials exhibited excellent smooth surface and high dielectric constants (5.2). The bottom-gate top-contact para-hexaphenyl (p-6P)/vanadyl-phthalocyanine OTFTs with this dielectric thin film as the dielectric layer exhibited more optimized threshold voltages (+4 V) and charge carrier mobility (0.7 cm2 V–1 s–1).