Electrical and CO gas-sensing properties of perovskite-type La0.8Pb0.2Fe0.8Co0.2O3 semiconductive materials

Nanocrystalline La0.8Pb0.2Fe0.8Co0.2O3 has been prepared by the citrate method. The structure, electrical and CO gas-sensing properties were investigated. The results demonstrated that La0.8Pb0.2Fe0.8Co0.2O3 is a perovskite phase with the orthorhombic structure, it shows p-type semiconducting proper...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2005-11, Vol.368 (1-4), p.204-208
Main Authors: Song, Peng, Qin, Hongwei, Zhang, Ling, Liu, Xing, Huang, Shanxing, Hu, Jifan, Jiang, Minhua
Format: Article
Language:English
Subjects:
Citric method
CO sensing
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electrical property
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Electronic transport in multilayers, nanoscale materials and structures
Exact sciences and technology
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Nanocrystalline materials
Perovskite
Physics
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
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Summary:Nanocrystalline La0.8Pb0.2Fe0.8Co0.2O3 has been prepared by the citrate method. The structure, electrical and CO gas-sensing properties were investigated. The results demonstrated that La0.8Pb0.2Fe0.8Co0.2O3 is a perovskite phase with the orthorhombic structure, it shows p-type semiconducting properties. In a wide temperature range of 40–200°C, La0.8Pb0.2Fe0.8Co0.2O3-based sensor showed good sensitivity and selectivity to CO gas. An empirical relationship of R=KCH2α with α=0.61 can be obtained.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2005.07.015