Simulation of Organic Thin Film Transistor at both Device and Circuit Levels

Document Type : Original Article

Authors

1 Department of Electronic Engineering, Military Technical College.

2 Center of Nanotechnology, Mansoura University.

Abstract

Organic materials and devices are gaining more and more attention in microelectronics. They are dedicated to low cost applications and easy fabrication. Organic thin film transistors (OTFTs) are now making significant inroads into many new large-area applications, considering that they can be fabricated at low temperatures and with high throughput on a wide range of unconventional substrates, such as glass, plastic, fabric, and paper. In this paper an OTFT model is used in cadence, a Verilog-a code is written and used to create an OTFT device. This is done so that OTFT circuits can be simulated before fabrication. First, the model is validated by characterizing the device, showing its FET characteristics. Second, the device is used inside a circuit, and the circuit performance is analyzed. Inverter circuit is implemented using the modelled OTFT device, transfer characteristics, input and output waveforms are drawn using the simulation tool. The transistors used have 10m/20u W/L ratio, the inverter is used at 1 kHz frequency.

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