Implementation of Digital Logic Gate Families Using Low Operating Flexible Organic TFT Based on Innovative Compact Modeling Approach

The article demonstrates the brief fabrication method of the flexible organic thin film transistor (OTFT) developed earlier and its utilization for the development of various basic logic gates (NAND, NOR, AND, NOT, and OR Gates). The compact modeling of the fabricated device and the implementation of the logic gates has been carried out using Silvaco-Techmodeler and Silvaco-Gateway tools, respectively. The device can operate at -2 V supply with good electrical characteristics in terms of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$-2\mu \mathrm{A}$</tex> drain current, <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathrm{I}_{\text{ON}}/\mathrm{I}_{\text{OFF}}\sim 10^{3}$</tex> ‘ and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mu_{p}\sim 0.1\text{cm}^{2}/\mathrm{V}-\sec$</tex> respectively. The Silvaco-Gateway tool implements the logic gates with excellent characteristics, demonstrating logic swing of 1.18 V and a delay of 3.7 ns. The logic gates also possess a good transient characteristic with all four possible logic inputs (00, 01, 10, and 11). The Silvaco-Techmodeler tool models the device with an accuracy of approximately 100%, with a 0.07% and 0.08% error between the experimental and modeled data, respectively. The cost-efficiently fabricated solution-processed transistor in this article can be further utilized in the fields of medical and sensing applications.