In this paper, we have used organic/inorganic double gate dielectrics to enhance pentacene growth and dielectric properties for organic thin film transistors (OTFTs). The effects of poly-4-vinylphenol (PVP)/CeO 2-SiO2 composite double gate dielectrics on the electrical properties of OTFTs have been investigated. The interface of the gate dielectric and organic semiconductor is one of the physical factors which govern the electrical performance of OTFTs and also the growth of pentacene is largely determined by the surface characteristics of the gate dielectric. Here, when a spin-coated organic smoothing dielectric on an inorganic metal oxide dielectric is used, the growth of pentacene and dielectric properties are significantly improved. We were able to manufacture high-quality pentacene TFTs with a mobility of 1.14 cm2 (V-1 s-1) and an on/off ratio of 104 at operating voltages of less than 5 V.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Materials Chemistry