CO-sensing characteristics of La0.8Pb0.2Fe0.8Co0.2O3 perovskite films prepared by RF magnetron sputtering

La0.8Pb0.2Fe0.8Co0.2O3 films have been prepared by RF magnetron sputtering. The structure and carbon monoxide (CO)-sensing characteristics were investigated. The results demonstrated that La0.8Pb0.2Fe0.8Co0.2O3 films showed a preference in orientation of (2 0 2) and (2 2 0). In a wide temperature range 80–300 °C, La0.8Pb0.2Fe0.8Co0.2O3 film-based sensor showed good response to CO gas. An empirical relationship of R=KCCOα with α=0.79 can be obtained.