Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO2 Thin Films Grown on the Glass Substrate

Petrov, Victor V.; Bayan, Ekaterina M.; Khubezhov, Soslan A.; Varzarev, Yuri N.; Volkova, Maria G.

doi:10.3390/chemosensors8020040

Open AccessArticle

Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO₂ Thin Films Grown on the Glass Substrate

by

Victor V. Petrov

^1,*,

Ekaterina M. Bayan

²

,

Soslan A. Khubezhov

^3,4

,

Yuri N. Varzarev

¹ and

Maria G. Volkova

²

¹

Institute of Nanotechnologies, Electronics, and Equipment Engineering, Southern Federal University, 347928 Taganrog, Russia

²

Department of Chemistry, Southern Federal University, 344090 Rostov-on-Don, Russia

³

Department of Physics, North-Ossetian State University, 362025 Vladikavkaz, Russia

⁴

Department of Physics and Engineering, ITMO University, 197101 St. Petersburg, Russia

^*

Author to whom correspondence should be addressed.

Chemosensors 2020, 8(2), 40; https://doi.org/10.3390/chemosensors8020040

Submission received: 23 April 2020 / Revised: 31 May 2020 / Accepted: 16 June 2020 / Published: 18 June 2020

(This article belongs to the Section Materials for Chemical Sensing)

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Abstract

ZnO–SnO₂ films with a thickness of up to 120 nm have been prepared on glass substrates by pyrolysis at 550 °C of three spin-coated organic precursors films. Films of four compositions were obtained on glass substrates. The prepared films were characterized by SEM, XRD, and XPS analysis. Electrophysical studies have shown that the activation energy of the temperature conductivity for all films is equal to 0.75 eV. While the gas-sensitive characteristics by CO treatment in low concentrations at a temperature of 200–300 °C was studied, their rapid degradation was found. Studies using the XPS method have shown that ZnO–SnO₂ films contain sodium, which is diffused from the soda-lime glass substrate during the film formation. Studies of XPS spectra after CO treatment have shown that the film surface is almost 50% composed of adsorbed water molecules and OH groups. OH groups are part of the sodium, tin, and zinc hydroxides formed on the surface. In addition, zinc hydrocarbonates are formed on the surface of the films. The detected insoluble compounds lead to the degradation of gas-sensitive properties of ZnO–SnO₂ films.

Keywords: ZnO; SnO₂; thin film; CO sensor; gas-sensitive properties

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MDPI and ACS Style

Petrov, V.V.; Bayan, E.M.; Khubezhov, S.A.; Varzarev, Y.N.; Volkova, M.G. Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO₂ Thin Films Grown on the Glass Substrate. Chemosensors 2020, 8, 40. https://doi.org/10.3390/chemosensors8020040

AMA Style

Petrov VV, Bayan EM, Khubezhov SA, Varzarev YN, Volkova MG. Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO₂ Thin Films Grown on the Glass Substrate. Chemosensors. 2020; 8(2):40. https://doi.org/10.3390/chemosensors8020040

Chicago/Turabian Style

Petrov, Victor V., Ekaterina M. Bayan, Soslan A. Khubezhov, Yuri N. Varzarev, and Maria G. Volkova. 2020. "Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO₂ Thin Films Grown on the Glass Substrate" Chemosensors 8, no. 2: 40. https://doi.org/10.3390/chemosensors8020040

APA Style

Petrov, V. V., Bayan, E. M., Khubezhov, S. A., Varzarev, Y. N., & Volkova, M. G. (2020). Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO₂ Thin Films Grown on the Glass Substrate. Chemosensors, 8(2), 40. https://doi.org/10.3390/chemosensors8020040

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Investigation of Rapid Gas-Sensitive Properties Degradation of ZnO–SnO₂ Thin Films Grown on the Glass Substrate

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