Preparation and Gas Sensing Study of NiO Thin Films

Authors

Nima P. Golhar

Abstract

Thin film technology offers significant advantages over thick films, making it highly desirable for a wide range of applications including solar cells, gas sensors, photovoltaic devices, biomedical systems, and supercapacitors. In this study, nickel oxide (NiO) thin films were successfully synthesized using the spin coating technique, employing nickel nitrate as the precursor. The films were deposited on glass substrates with dimensions of 2 × 2 cm. The gas sensing performance of the NiO thin films was evaluated against various oxidizing and reducing gases such as NH₃, LPG, NO₂, CH₄, and ethanol. Among these, the films exhibited the highest sensitivity to LPG, with a maximum response of 85.76% at an optimal operating temperature of 120 °C. The films demonstrated excellent selectivity towards LPG, along with a rapid response time (~09s) and a swift recovery time (~32 s), highlighting their potential for efficient gas sensing applications.

Keywords

Thin Film, Gas Sensors, Glass Substrates, Sensitivity, Selectivity, Response Time

Preparation and Gas Sensing Study of NiO Thin Films. Nima P. Golhar. 2023. IJIRCT, Volume 9, Issue 5. Pages 1-9. https://www.ijirct.org/viewPaper.php?paperId=2504072