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

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 or-thorhombic structure with Pnma space group. The electrical properties showed the P-type semiconduc-tor 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 5 ppm to 30 ppm at the operating temperature of 250 degrees C.(c) 2022 Elsevier B.V. All rights reserved.