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The effect of film oxygen content on SnOitx gas-sensor selectivity

✍ Scribed by D.S. Vlachos; C.A. Papadopoulos; J.N. Avaritsiotis

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
386 KB
Volume
25
Category
Article
ISSN
0925-4005

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✦ Synopsis

The effect of the oxygen content in tin oxide films on selectivity in gas detection has been studied. The experimental results

show that sensors with different Sn:O ratios exhibit different behaviour in response to CO and ethanol. A theoretical explanation of this phenomenon is presented, which is based on the density of oxygen vacancies at the surface. Moreover, a simple parametric method using three sensors with different Sn:O ratios has been tested to distinguish between CO and ethanol.

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