CO Sensor Using ZnO Thin Film Derived by RF Magnetron Sputtering Technique

In this paper, the fabrication and results of zinc oxide (ZnO) thin-film CO gas sensor are discussed. The thin film of c-axis oriented ZnO is deposited on Si/SiO 2 substrate at room temperature using RF magnetron sputtering technique. The deposited ZnO film is annealed at different temperatures star...

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Bibliographic Details
Published in:IEEE sensors journal 2014-05, Vol.14 (5), p.1577-1582
Main Authors: Dwivedi, Mohini, Bhargava, Jitendra, Sharma, Ashok, Vyas, Vimal, Eranna, Golla
Format: Article
Language:English
Subjects:
Annealing
CO gas
Gas detectors
RF sputtering
SEM
Solar energy
Sputtering
Temperature sensors
thin film
Thin films
XRD
Zinc oxide
Zinc oxides
ZnO
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Summary:In this paper, the fabrication and results of zinc oxide (ZnO) thin-film CO gas sensor are discussed. The thin film of c-axis oriented ZnO is deposited on Si/SiO 2 substrate at room temperature using RF magnetron sputtering technique. The deposited ZnO film is annealed at different temperatures starting from 200 °C to 400 °C. The crystalline structural properties are analyzed by X-ray diffraction technique and the preferred orientation of ZnO thin film (along 002 direction) is found at 400 °C. Further, ZnO thin film is characterized by scanning electron microscopy and surface profilometer to analyze the surface properties and thickness. The deposited ZnO film is supported by Au electrodes and Pt microheater to couple the sensing signal with outer circuitry. A measurement system is also developed to measure the gas sensing properties and the results are discussed in detail.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2014.2298879