DOI: 10.15330/pcss.16.1.49-54

D.M. Freik¹, S.І. Mudriy², Ts.A. Kriskov³, І.V. Gorіchok¹, O.M. Matkіvsky¹, T.O. Semko¹

Synthesis and Properties of Highly Efficient Thermoelectric Materials Based on Lead Telluride with Antimony and Silver Impurity

¹Vasyl Stefanyk Prekarpathian University, Shevchenko Str., 57, Ivano-Frankivsk, 76018, Ukraine, e-mail: fcss@pu.if.ua
3Ivan Franko Lviv National University, 6, Kyryl & Mephodiy Str., Lviv, 79005
²Kamyanets-Podilsky State University, Ogienko Str. 61, Kamyanets-Podilsk, 32300, Ukraine, е-mail: fizkaf@ua.fm

The paper presents the results of research of X-ray diffraction and thermoelectric parameters (thermoelectric coefficient α, electrical conductivity σ and thermal conductivity coefficient k) of materials based on Lead Telluride: PbTe, PbTe:Sb, PbTe-Sb2Te3, Pb18Ag1Sb1Te20, Pb18Ag2Te20 and PbTe-Ag2Te. Established that the highest values of thermoelectric figure of merit have samples of PbTe:Sb (0,3 at.%) and system Pb18Ag1Sb1Te20, Pb18Ag2Te20. For PbTe:Sb is due to a significant increase of the electrical conductivity. For the other two materials is due to a increase the thermoelectric coefficient and a significant decrease of thermal conductivity compared to pure PbTe.
Keywords: Lead telluride, doping, solid solutions, LAST, thermoelectric properties.

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