Spay pyrolyzed nanostructured tin dioxide thin films doped by cobalt: Correlation between structural and gas sensing characteristics

Abstract

Effect of Co-doping on gas sensing, electrophysical and structural properties of the SnO2 films deposited by spray pyrolysis has been studied. It is found that the influence of Co-doping on parameters of the SnO2-based gas sensors depends on the concentration of doping additives and could be accompanied by either improvement of sensor parameters at low levels of doping (Cco< 2-4%) or degradation of the gas sensor operation characteristics while the concentration of additives exceeds 2-4%. An explanation of observed effects is given. © (2013) Trans Tech Publications, Switzerland.