Affiliation:
1. Department of Electronic Engineering, Howard College, University of KwaZulu-Natal, Durban, 4041, South Africa
Abstract
Introduction:
Applications of Organic Thin Film Transistor (OTFT) range from flexible
screens to disposable sensors, making them a prominent research issue in recent decades. A very accurate
and exact pH sensing determination, including biosensors, is essential for these sensors.
Methods:
In this present research work, authors have proposed a nanomaterial-based OTFT for future
pH monitoring and other biosensing applications. This work presents a numerical model of a pH sensor
based on Carbon Nano Tubes (CNTs). Sensing in harsh conditions may be possible with the CNTs due
to their strong chemical and thermal resilience. This research work describes the numerical modeling of
Bottom-Gate Bottom-Contact (BGBC) OTFTs with a Semiconducting Single-Walled Carbon Nanotube
(s-SWCNT) and C60 fullerene blended active layer.
Results:
The design methodology of organic nanomaterial-based OTFTs has been presented with various
parameter extraction precisely its electrical characteristics, modeled by adjusting the parameters of
the basic semiconductor technology. For an active layer thickness of 200 nm, the drain current of the
highest-performing s-SWCNT:C60 -based OTFT structure was around 4.25 A. This demonstrates that it
is better than previously reported patents and published works.
Conclusion:
This allows for an accurate representation of the device's electrical characteristics. Using
Gold (Ag) Source/Drain (S/D) and back-gate electrodes as the medium for sensing, it has been realized
how the thickness of the active layer impacts the performance of an OTFT for pH sensor applications.
Publisher
Bentham Science Publishers Ltd.
Subject
General Engineering,Condensed Matter Physics,General Materials Science