Abstract
This work deals with the sensitivity performance of NiSnO3 sprayed thin films against ethanol vapor. First, this film shows a polycrystalline nature by means of AFM observations with a crystallite size close to 50 nm. Also, TEM technique shows uniform in shape and particle size of as prepared NiSnO3. Second, the electrical conductivity was studied using impedance spectroscopy technique in the frequency range 10 Hz−13 MHz at various temperatures (175°C–225 °C). The electrical conductivity appears as the sum of both contribution of the electrical conductivity of grain and grain boundary. Finally, the ethanol sensing performance of the films has been investigated at various concentrations in air at operating temperatures varying from 175 °C to 250 °C. A noticeably sensitivity to ethanol vapor concentration of C = 0.1% is found at T = 225 °C.
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•A new method was developed to perform NiSnO3 perovskite sprayed thin films.•The NiSnO3 thin films are characterized by XRD, TEM, AFM and impedance spectroscopy.•TEM and AFM investigation shows good homogeneity of film.•The sensitivities of the NiSnO3 are excellent to ethanol at T = 225 °C.