THERMOELECTRIC CHARACTERISTICS OF THE THERMOPILE SENSORS PROCESSED WITH THE ELECTRODEPOSITEDBi–TeANDSb–TeTHIN FILMS

Min-Young Kim and Tae-Sung Oh ()
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Min-Young Kim: Department of Material Science and Engineering, Hongik University, 72-1 Sangsu-dong, Mapo-gu, Seoul 121-791, Korea
Tae-Sung Oh: Department of Material Science and Engineering, Hongik University, 72-1 Sangsu-dong, Mapo-gu, Seoul 121-791, Korea

Surface Review and Letters (SRL), 2010, vol. 17, issue 03, 311-316

Abstract: A thermopile sensor composed of 196 pairs of p–n thin film legs was processed on a glass substrate by using successive electrodeposition of the n-typeBi–Teand the p-typeSb–Tethin films. The 5.3-μm thickBi–Tefilm, electrodeposited at a constant voltage of -50 mV in the 50-mM electrolyte with theBi/(Bi + Te)mole ratio of 0.5, exhibited a Seebeck coefficient of -67 μV/K. The 5.2-μm thickSb–Tefilm, electrodeposited at a constant voltage of 20 mV in the 70-mM solution with theSb/(Sb + Te)mole ratio of 0.9, possessed a Seebeck coefficient of 63 μV/K. The thermopile sensor exhibited the sensitivities of 13.1 mV/K with temperature differences smaller than 9 K and of 27.3 mV/K with temperature differences larger than 9 K respectively, across the hot and cold ends.

Keywords: Thermoelectric; thermopile sensor; thin film; electrodeposition (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1142/S0218625X10013813

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