Parameter Extraction and Evaluation of UOTFT Model for Organic Thin-Film Transistor Circuit Design

In this paper, we report a systematic approach to extract parameters from organic thin film transistors (OTFTs) that are used for compact Spice models. The universal organic thin-film transistor (UOTFT) model and Silvaco´s Smartspice platform are utilized for simulations whereas experimental data are collected from Plastic Logic´s (PL) thin-film transistors that are processed on flexible plastic substrates. The parameter extraction procedure is outlined where both current-voltage and capacitance-voltage measurements are employed. This is then followed by simulations of inverters and ring oscillators to assess the results against simple logic circuits.