Design and Performance Evaluation of OTFT and CMOS Logic Gates

The growing potential of organic thinfilm transistors (OTFTs) as a viable alternative to traditional semiconductor technologies, focusing on the design of complex digital circuits using p-type OTFTs. While OTFTs have gained attention, there is a gap in the literature regarding comprehensive designs that fully exploit their unique properties, particularly for logic circuits. The study proposes the design and simulation of universal logic gates-AND, NAND, OR, NOR, and XOR-using LT Spice to evaluate performance metrics such as power dissipation and operational delay, in comparison with conventional CMOS circuits. The results show that OTFT-based circuits achieve approximately 30% lower power dissipation than their CMOS counterparts while maintaining similar operational delays. Furthermore, the development of a 2-to-l multiplexer and a full adder demonstrates the practical applicability of OTFTs in flexible, low-cost electronics. These findings highlight the potential of OTFTs in advancing flexible electronic devices, such as wearable technologies and biomedical sensors, addressing current limitations in organic semiconductor applications.