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Vol. 36 No. 7 (2024): Vol 36 Issue 7, 2024

Copyright (c) 2024 Yogasaraswathi .R, Dheepa .J

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This work is licensed under a Creative Commons Attribution 4.0 International License.

Effect of Zinc Doping and Porosity on Structural, Morphological and Gas Sensing Properties of Porous Zn:SnO2 Bilayer Thin Film

https://doi.org/10.14233/ajchem.2024.31471
R. Yogasaraswathi
PG and Research Department in Physics, Government Arts College (Autonomous), Coimbatore-641018, India
https://orcid.org/0000-0001-8113-8383
J. Dheepa
PG and Research Department in Physics, Government Arts College (Autonomous), Coimbatore-641018, India

Corresponding Author(s) : R. Yogasaraswathi

yogasaraswathi.astro@gmail.com

Asian Journal of Chemistry, Vol. 36 No. 7 (2024): Vol 36 Issue 7, 2024

Abstract

The automated nebulizer spray pyrolysis technique was used to synthesize porous SnO2 bilayer thin films as well as doped porous SnO2 bilayer thin films with varying zinc doping percentages. The synthesized thin films were characterized using X-ray diffraction, field emission scanning electron microscopy, energy dispersive analysis of X-rays, UV-Vis spectroscopy, photoluminescence spectroscopy, current-voltage characteristics and gas sensing performance. The effect of doping on sensor response was investigated using various gases and operating temperatures. The optimized Zn-doped porous SnO2/SnO2 gas sensor sample was taken to further gas sensing analysis. The results revealed that the doping of zinc with a porous tin oxide bilayer increases the gas sensor response at low operating temperatures compared to undoped porous tin oxide bilayers and it also reduces the response recovery time of the sensor. The response of the sensor in a CO gas concentration of 400 ppm has been improved with good repeatability.

Keywords

Porous SnO2 Bilayer films Zinc doping Automated nebulizer spray technique CO gas sensor
Yogasaraswathi, R., & Dheepa, J. (2024). Effect of Zinc Doping and Porosity on Structural, Morphological and Gas Sensing Properties of Porous Zn:SnO2 Bilayer Thin Film. Asian Journal of Chemistry, 36(7), 1579–1586. https://doi.org/10.14233/ajchem.2024.31471
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