CdO: SnO2 Composite UV-Assisted Room Temperature Ozone Sensor

Mohammed O. Salman; Mohammed A. Kadhim; Abed A. Khalefa

doi:10.24996/ijs.2023.64.3.15

Authors

Mohammed O. Salman Department of Medical Physics, College of Applied Science, University of Fallujah, Iraq https://orcid.org/0009-0009-1475-4851
Mohammed A. Kadhim University of Kerbala College of Science
Abed A. Khalefa Ministry of Education, General Directorate of Salah AL-din

DOI:

https://doi.org/10.24996/ijs.2023.64.3.15

Keywords:

Metal oxide, Cd–Sn oxide, gas sensor, UV-assisted sensor, Ozone sensor

Abstract

Cadmium-tin oxide (CSO) thin films were fabricated by spray pyrolysis method at different substrate temperatures (T_s). The results showed a significant effect of T_s on the surface morphology and the electrical properties, which in turn has a significant effect on sensor gas sensitivity. The sample prepared at 400 °C appeared in the form of a donut shape, which has the best ozone sensitivity. No ozone sensitivity appeared in-dark, while showed good sensitivity when illuminated with UV at room temperature (RT). The study showed that the photon exposure method can substitute for the conventional method of sensors heating.