Channel length-dependent Performance Study of OTFT: Analytical modeling using MATLAB

Abstract

Transistors are widely used components in various electronic devices. Recently, organic semiconductor-based transistors known as organic thin-film transistors have come into existence as researchers have improved the conductivity of organic semiconductors to a greater extent enabling the fabrication of organic transistor having excellent electrical characteristics compared to silicon-based transistors. Analytical modeling of such organic transistors helps in understanding device physics more clearly and helps to enhance the features of the device too. In this paper, analytical modeling has been done using MATLAB tool to study the channel length variation effect on the organic transistor, and output characteristics are simulated for various channel length (L). $\mathbf{10}\mu\mathbf{m},\mathbf{20}\mu\mathbf{m},\mathbf{30}\mu\mathbf{m}$ and $\mathbf{40}\mu\mathbf{m}$ channel lengths are taken into consideration for modeling. The simulation result states that at low channel length, the higher drain current is observed. Thus, such analytical simulation helps in obtaining useful information about device electrostatic characteristics.