A NOVEL METHOD FOR THE IMPROVEMENT IN THERMOELECTRIC PROPERTY OF TIN OXIDE THIN FILMS AND ITS APPLICATION IN GAS SENSING

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International Journal on Smart Sensing and Intelligent Systems

Professor Subhas Chandra Mukhopadhyay

Exeley Inc. (New York)

Subject: Computational Science & Engineering , Engineering, Electrical & Electronic

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eISSN: 1178-5608

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VOLUME 1 , ISSUE 2 (June 2008) > List of articles

A NOVEL METHOD FOR THE IMPROVEMENT IN THERMOELECTRIC PROPERTY OF TIN OXIDE THIN FILMS AND ITS APPLICATION IN GAS SENSING

Anuradha S / K. Rajanna

Keywords : Tin oxide, Seebeck coefficient, Gas sensor, Chromium, Acetone.

Citation Information : International Journal on Smart Sensing and Intelligent Systems. Volume 1, Issue 2, Pages 498-511, DOI: https://doi.org/10.21307/ijssis-2017-304

License : (CC BY-NC-ND 4.0)

Published Online: 13-December-2017

ARTICLE

ABSTRACT

Tin oxide thin film deposited on to glass substrates by the process of DC reactive magnetron sputtering has been used in our work. These films were characterized for their thermoelectric behavior. Further, a novel method has been developed to enhance the Seebeck coefficient of these films. Prior to the oxide film deposition on the glass substrate, thin metal films have been deposited at the two ends of the sample. High conductivity metals such as chromium, silver and copper were used for this purpose. On characterizing these films for their thermoelectric property, a high Seebeck coefficient of 400 μV/0C has been achieved. In addition to this, we also report the results of the gas sensing behavior of a sensor developed using this film which exhibited a maximum response to acetone gas at a relatively low temperature of 110 0C.

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REFERENCES

1. D. M. Rowe, “CSC Handbook of Thermoelectrics”, CRC Press, Boca Raton, FL, 1995.
2. P.T. Moseley and B.C. Tofield, "Solid State Gas Sensors", Adam Hilger, Bristol, 1987.
3. G. Chen, M. S. Dresselhaus, G. Dresselhaus, J.-P. Fleurial and T. Caillat, “Recent Developments in Thermoelectric Materials”, International Materials Review, Vol. 48, No. 1, 2003.
4. Ioffe A. F., Airapetyants S. V., Ioffe A. V., Kolomoets N. V., and Stilbans L. S., “On Increasing the Efficiency of Semiconducting Thermocouples”, Dokl. Akad. Nauk SSSR, 106, 931(1956).
5. Anuradha S, K. Rajanna, “Development of Thermoelectric Gas Sensors for Volatile Organic Compounds”, Proceedings of the 5th IEEE Conference on Sensors 2006, 716.

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