Preparation of double-doping LaFeO3 thin film for ethanol sensing application

•La0.8Pb0.1Ca0.1FeO3 sample crystallizes in the orthorhombic structure with Pnma space group.•Our compound presents a nano-metric size.•La0.8Pb0.1Ca0.1FeO3shows a p-type semiconductor behavior.•La0.8Pb0.1Ca0.1FeO3 sensor is a captor of ethanol-gas even with low concentration equal to 5 ppm.•T=250°C is the operating temperature of La0.8Pb0.1Ca0.1FeO3sensor. Recently, perovskite-based nanomaterials are used in diverse applications. Many perovskite nanoparticle-based devices have been demonstrated with extraordinary sensing performances to various chemical species in both solid and solution states. In this context, a new ethanol gas sensor La0.8Ca0.1Pb0.1FeO3 has been developed. La0.8Ca0.1Pb0.1FeO3 film has been prepared using the drop coating method onto SiO2/Si transducers with platinum interdigited electrodes based on the use of nanopowders which are prepared by sol-gel method. X-ray diffraction (XRD) showed that our sample was still perovskite phase with orthorhombic structure with Pnma space group. The electrical properties showed the P-type semiconductor behavior of our sensor and the ethanol sensing measurements revealed his good sensitivity towards C2H5OH-gas. The response (S=Rg/Ra) was found to increase from 2.040 to 3.250 when concentration increased from 5ppm to 30ppm at the operating temperature of 250∘C. [Display omitted] La0.8Pb0.1Ca0.1FeO3sensor response (S) to different concentrations (5,10,20and30ppm) of ethanol gas (C2H5OH) at TOp=250∘C and for an exposure time equal to 4min.