Vol.:(0123456789) 1 3 Journal of Inorganic and Organometallic Polymers and Materials https://doi.org/10.1007/s10904-020-01660-0 Screen Print Fabricated In 3+ Decorated Perovskite Lanthanum Chromium Oxide (LaCrO 3 ) Thick Film Sensors for Selective Detection of Volatile Petrol Vapors Vrushali Shyamrao Shinde 1,3  · Kailas Haribhau Kapadnis 2  · Chatur Pundlik Sawant 1  · Prashant Bhimrao Koli 4  · Rajendra Popat Patil 5 Received: 23 April 2020 / Accepted: 4 July 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020 Abstract The present work deals with the fabrication of undoped lanthanum chromium oxide and indium doped lanthanum chromium oxide material by cost efective sol–gel method. The four sensors were fabricated by screen printing technique. The indium ion concentration was varied for LaCrO 3 material from 0.1 M% to 0.7 M% to access the comparative gas sensing results. All the prepared materials were characterized by XRD, SEM, EDAX, TEM and IR to confrm their structural and chemical composition. The prepared sensors viz. 0.1 M% In 3+ doped LaCrO 3 , 0.3 M% In 3+ doped LaCrO 3 , 0.5 M% In 3+ doped LaCrO 3 and 0.7 M% In 3+ doped LaCrO 3 were investigated for gas sensing mechanism for selected gases such as petrol vapours, ethanol, ammonia, NO 2 , H2S and CO 2 gases. The optimum response was recorded for tested gases for all the prepared sensors. The 0.3 M% In 3+ doped LaCrO 3  found to be exceptional for petrol vapour and highest response was recorded for petrol vapors for 0.3 M% In 3+ doped LaCrO 3 thick flm sensor. All the indium doped are found to be good sensors for petrol vapours and moderate for other tested gases. The prime parameters for the sensors such as selectivity, response and recovery and reproducibility were recorded for the prepared sensor. The response and recovery was very rapid for 0.3 M% In 3+ doped LaCrO 3 sensor. The gas sensing mechanism for petrol vapours has been established for 0.3 M% In 3+ doped LaCrO 3 sensor via hole accumulation layer mechanism. * Vrushali Shyamrao Shinde vrushali.inorg1988@gmail.com 1 Nano Chemistry Research Laboratory, Department of Chemistry, Gajmal Tulshiram Patil Arts, Science, and Commerce College Nandurbar, Afliated to Kavayitri Bahinabai Chaudhari North Maharashtra University, Jalgaon 425412, MH, India 2 Research Centre in Chemistry and PG Department of Chemistry, Loknete VyankatraoHiray Arts, Science, and Commerce College Panchavati, Afliated toSPPU, Pune, MH, India, Nashik 422003, India 3 Department of Chemistry, K.R.T Arts, B.H. Commerce and A.M. Science, College of Nashik, Afliated to SPPU, Pune, MH, India, Pune, MH 422003, India 4 Department of Chemistry, Arts, Commerce and Science College, Afliated to SPPU, Pune, MH, India, Nandgaon, Nashik 423106, India 5 Department of Chemistry, Bhosala Military College, Afliated to SPPU, Pune, MH, India, Nashik 422005, India