Design and Simulation of OTFT Using Bi-Polymer Layers Based on Squid Optimization with Dielectric Medium to Enhance Electrical Characteristics

Organic thin-film transistor (OTFT) has grown significantly and is now an advanced technology. One of the biggest and most favourable electronic device technologies for printable and flexible electronics is the organic thin film transistor. However, designing large-scale integration circuits remains difficult due to device uniformity. Although semiconductor layer technology has advanced, the quality of the dielectric layers is similarly essential. Leakage current and transistor size are the main factors which impact the electronic device. However, leakage current occurs due to the reduction of dielectric material that affects the parameters like threshold voltage, capacitance and transconductance. To overcome the aforementioned drawbacks, the bi-polymer layers based on squid optimization with the dielectric medium is proposed. Bi-polymers such as PEI-EP (polyetherimide–epoxy polymer), POM-H (polyoxymethylene homopolymer) and SiO \({}_{2}\) is utilized as trilayer dielectric material in this proposed method to reduce the leakage current and act as insulator. Squid game optimization is applied to optimally select the dielectric thickness to perform better performance in the device. Electrical measurements such as \(I{-}V\) , transfer characteristics, mobility ( \(\mu\) ) and capacitance (pF) are used to evaluate the performance of the device. The obtained electrical characteristics are mobility as 355 cm \({}^{2}\) V \({}^{-1}\) s \({}^{-1}\) and capacitance value as 7.00 pF are compared with the existing dielectric materials. The experiment shows that the simulation and modelling of the proposed method performs better than the other existing dielectric medium.