Comparative Analysis of OFETs Materials and Devices for Sensor Applications

Organic electronics have become an active topic of research in the area of semiconductor transistors. Organic-field effect transistors (OFET) which uses special organic compounds have excellent mechanical flexibility, light weight, low temperature deposition, low manufacturing cost and conformable large coverage area in contrast to crystalline silicon based transistors. This article highlights the OFET operation along with the influence of gate dielectric thickness, electrode and channel width on the behavior of transistors in terms of threshold voltage, current ratio and saturation mobility value. Furthermore, review the perspective use of such devices in the advance sensing application including flexible/wearable electronics, and biosensors to highlight recent progress in this area. Here, the focus is on the optimal selection of organic semiconductor material and polymers to enhance stability and selectivity. Despite much progress, low power consumption is a major parameter needed to improve. Therefore various strategies are outlined such as high dielectric constant, less contact resistance, minimizing sub threshold slope to overcome the power consumption problem.