Water-processed Dielectric Layer for Eco-friendly High Performance Organic Thin Film Transistors*

People come into touch with and utilize technological gadgets and sensors on a regular basis. However, this causes them to degrade into electrical and electronic trash. There are numerous techniques for reducing these wastes, but one of them is to replace the standard oxide dielectric layer used in electronics with eco-friendly and economical materials. Although research has so far produced a device using components like cellulose, collagen, etc., it is difficult to develop a high-performance thin film transistor (TFT) working at a low voltage because to its relatively high phosphorous voltage [2]. This exposes the pinhole, which might result in a substantial leakage current. In this work, an organic thin film transistor with a dielectric layer was made using a substance known as gum arabic (GA). GA is a material manufactured from the Acacia Senegal tree, which grows in sub-Saharan Africa [3]. GA may be converted into an aqueous solution and has a high dielectric constant of k to 30 at 1 kHz [1]. As a result, we used DNTT, a p-type organic material, to develop an organic thin film transistor. This led to the realization of an organic thin film transistor with a hole mobility of at least 10 cm²/Vs.