Title of article
Detection of reducing gases by SnO2 thin films: an impedance spectroscopy study
Author/Authors
Kaur، نويسنده , , Manmeet and Gupta، نويسنده , , S.K. and Betty، نويسنده , , C.A. and Saxena، نويسنده , , Vibha and Katti، نويسنده , , V.R. and Gadkari، نويسنده , , S.C. and Yakhmi، نويسنده , , J.V.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2005
Pages
6
From page
360
To page
365
Abstract
Impedance spectroscopy studies were carried out on SnO2 thin films after exposure to H2S and NH3 gases in frequency range of 0.1 Hz to 1 MHz. The results showed that the impedance is mainly contributed by potential barrier at grain boundaries. Cole–cole plots showed a reduction in real part of impedance at low frequencies on exposure to both gases. Analysis of data revealed that this arises due to reduction in real part of grain boundary impedance and not due to negative capacitance (inductance) effect. The effect has been attributed to formation of ions on interaction of reducing gases and their drift to grain boundary region in the presence of applied field.
Keywords
Semiconductor thin films , Gas sensors , Electric impedance measurement
Journal title
Sensors and Actuators B: Chemical
Serial Year
2005
Journal title
Sensors and Actuators B: Chemical
Record number
1420677
Link To Document