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CO2 gas sensing properties of La2O3 thin films deposited at various substrate temperatures

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Abstract

Carbon dioxide gas (CO2) sensing properties of La2O3 thin films synthesized by spray pyrolysis method are reported. La2O3 thin films deposited at different substrate temperatures (573–623 K) are characterized for their structural, surface morphology, optical and electrical properties and used for CO2 gas response measurements. SEM analyses indicate porous surface morphology. The deposited La2O3 films are crystalline with pronounced orientation along (110) plane, uniform and adhere to the glass substrate. From optical absorbance studies, the optical band gap is found to be 4.2 eV. With porous surface morphology, the maximum response of 18% at 623 K substrate temperature is recorded on exposure of 350 ppm of CO2 gas.

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Acknowledgements

This work was supported by the Human Resources Development program (No. 20124010203180) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP). Grant funded by the Korea government Ministry of Trade, Industry and Energy and supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (NRF-2015R1A2A2A01006856).

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Authors and Affiliations

  1. Thin Film Physics Laboratory, Department of Physics, Shivaji University, Kolhapur, Maharashtra, 416004, India

    A. A. Yadav & P. A. Shinde

  2. D. Y. Patil University, Kolhapur, Maharashtra, India

    C. D. Lokhande

  3. Photonic and Electronic Thin Film Laboratory, Department of Materials Science and Engineering, Chonnam National University, Gwangju, 500-757, South Korea

    A. C. Lokhande & J. H. Kim

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  1. A. A. Yadav
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  2. A. C. Lokhande
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  3. P. A. Shinde
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  4. J. H. Kim
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  5. C. D. Lokhande
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Correspondence to J. H. Kim or C. D. Lokhande.

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Yadav, A.A., Lokhande, A.C., Shinde, P.A. et al. CO2 gas sensing properties of La2O3 thin films deposited at various substrate temperatures. J Mater Sci: Mater Electron 28, 13112–13119 (2017). https://doi.org/10.1007/s10854-017-7144-7

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  • DOI: https://doi.org/10.1007/s10854-017-7144-7

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