Investigation of suitability of high performance carbon derived from tea waste biomass to transistor applications

Carbon materials are studied in high-tech electronics such as diodes, transistors similar devices. The use of porous carbon materials in electronic devices and their application in energy storage areas are important in terms of developing more economical methods and reducing the dimensions. Although a large number of carbon channel transistors have been reported in the literature in recent years, transistor applications of carbon from biomass as porous carbon are limited. Most of the carbon materials are originated from fossil sources that are diminishing. So, renewable carbon resources are gaining importance. Biomass is the only renewable carbon resource. It can be converted to carbonized material called biochar by pyrolysis. However, in order to apply the biochar to carbon-based electrical devices, its structure needs to be improved. In this thesis, biochar obtained from industrial tea wastes was converted to high performance carbon material (graphene-like) by chemical and physical methods. The upper contact / upper door structured field effect transistors (FETs) were made by using these carbon materials that silver paint was used as contact point paste. The newly derived carbon materials were characterized by SEM, XRD, Raman Spectroscopy, FT-IR, TGA methods. The current-voltage (I-V) characteristics of the developed FETs were determined.