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Interpretation of the electrical properties of a SnO2 gas sensor after treatment with sulfur dioxide

Abstract : It has recently been established that the electrical properties of tin oxide are greatly modified after a sulfur dioxide treatment at 500°C. According to the type of gas present in the atmosphere, its electrical conductance curves as a function of temperature exibit maxima at different temperatures. Such a maximum may be understood in terms of potential barrier at the SnO2 metal junction and in terms of a chemical reaction which induces an increase of the sample's conductance at low temperature. The surface states of SnO2 , and consequently the nature of the water vapour present on the surface, are greatly affected by the gaseous treatment.
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https://hal-emse.ccsd.cnrs.fr/emse-00433405
Contributor : Andrée-Aimée Toucas <>
Submitted on : Thursday, November 19, 2009 - 11:18:48 AM
Last modification on : Wednesday, June 24, 2020 - 4:18:18 PM

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René Lalauze, Dai Nghia Bui, Christophe Pijolat. Interpretation of the electrical properties of a SnO2 gas sensor after treatment with sulfur dioxide. Sensors and Actuators, Elsevier, 1984, 6 (2), pp.119-125. ⟨10.1016/0250-6874(84)85005-2⟩. ⟨emse-00433405⟩

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