Organic Thin Film Transistor Architecture, Parameters and their Applications

Abstract

Organic Thin Film Transistors (OTFTs) are promising devices for future development of variety of low-cost and large-area electronics applications such as flexible displays. This paper analyzes the performance of OTFT made of several organic semi conducting and insulating materials and further discusses their applications. Analysis of previous research work demonstrates that the mobility in OTFT decreases when the product of semi conducting film thickness and gate capacitance per unit area increases. The decrease is specified by a power law function with parameters for several organic semiconductors. OTFT characteristics have undergone spectacular improvements during the last few years. This paper explores the effect of variation of channel length from 40 nm to 20 nm on drain current for pentacene bottom contact structure. Variations in these quantities maps to variations in the electrical behaviour of devices. It has been found that drain current increases due to decrease in length of organic thin film conducting channel. It reviews recent progress in parameter properties for device designs and applications related to OTFTs. The performance of OTFTs is evaluated in terms of mobility, on/off current ratio, threshold voltage and sub threshold slope. This paper thoroughly discusses the overall performance and applications of OTFTs in various fields.