Application of thermal-cured polymers as gate dielectrics to plastic-based organic thin-film transistors

We have synthesized thermal-curable polymers by mixing poly(vinyl phenol) and a thermal-crosslinking agent (MMF). These polymeric insulating films exhibit good chemical, physical and electrical properties as dielectrics. Their insulating and dielectric properties are dependent on MMF concentration. We have fabricated plastic-based organic thin-film transistors (OTFTs) with these dielectric layers to investigate the relationship between the performance of the OTFT and the electrical/chemical properties of these insulating films. The OTFT showed good electrical performance; the field-effect mobility was 1.1 cm ²V^-1s^-1. It has been found that a relatively low dielectric constant of a dielectric layer gave higher field-effect mobility.