Effects of additives on semiconductor gas sensors

The effects of additives of various metals and metal oxides on SnO 2 and ZnO sensors are examined. The gas sensitivity ( k) usually goes through a maximum with increasing temperature, and the effects of additives can be approximately compared in terms of the temperatures ( T M) at the maxium of gas...

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Bibliographic Details
Published inSensors and actuators Vol. 4; pp. 283 - 289
Main Authors Yamazoe, N., Kurokawa, Y., Seiyama, T.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 1983
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Summary:The effects of additives of various metals and metal oxides on SnO 2 and ZnO sensors are examined. The gas sensitivity ( k) usually goes through a maximum with increasing temperature, and the effects of additives can be approximately compared in terms of the temperatures ( T M) at the maxium of gas sensitivity ( k M). It is shown that T M is well correlated with the temperature at which the catalytic oxidation of the sample gas proceeds at a certain rate. The effects of additives on k seem to be more complex. Based on XPS measurements, two types of sensitization mechanism, chemical and electronic, are proposed.
ISSN:0250-6874
DOI:10.1016/0250-6874(83)85034-3