Performance Evaluation of P-Type Semiconducting Metal Oxide-Based Gas Sensors

Industrial and technological practices need a device to detect harmful and poisonous gases dangerous to humanity, animals and plants which resulted in fabrication of detecting apparatus that can sense and select harmful gases, identify them and alert man for appropriate action. Several researches are going on regarding p-type semiconducting metal oxides as gas sensors. The prominence of p-type semiconductor metal oxide-based gas sensor has attracted interest of numerous research populations, because of their excellent reproducibility, high sensitivity, portability, cheap and non-toxic nature. Here, synthesis techniques, performance and application of p-type semiconducting metal oxides as gas sensors are evaluated. Fundamentals of gas-sensing features of p-type semiconducting metal oxides were also discussed.