Role of Hetero Junction as Gas Sensor

Abstract

In the modern industry, it has become more important to measure compositions of gas mixtures. Due to this requirement, the need of gas sensing systems with lower price and good quality has increased. These gas sensing systems are able to detect the inorganic gases and volatile organic compounds.

Semiconductor gas sensors are becoming so important in this area. It is also observed that from the past few years the performance of sensing the gases with the help of these kinds of systems has been increased significantly. With the passage of time and increase in the technology level, the sensitivity and stability of these sensors have enhanced rapidly. The current article highlights the role of hetero-junctions as sensors. The proposed hetero-junctions are made from several n-type semiconductor metal oxides.