Transport Phenomena in the Vapor-phase PbTe-Bi2Te3 Condensates on Sital

Authors D.M. Freik1 , B.S. Dzundza1 , J.S. Yavorskyy1, I.S. Bylina1, T.S. Lyuba2

1 Vasyl Stefanyk PreCarpathian National University, 57, Shevchenko Str., 76025 Ivano-Frankivsk, Ukraine

2 Kamenetz-Podolsk National University, 61, Ogienko Str., 32300 Kamenetz-Podolsk, Ukraine

Issue Volume 5, Year 2013, Number 3
Dates Received 31 July 2013; published online 17 October 2013
Citation D.M. Freik, B.S. Dzundza, J.S. Yavorskyy, et al., J. Nano- Electron. Phys. 5 No 3, 03054 (2013)
PACS Number(s) 68.37. Hk, 78.66.Hf,81.15Ef
Keywords Films of PbTe-Bi2Te3 solid solution, Thermoelectric properties (3) , Scattering mechanisms.
Annotation Dependences of the structural characteristics and electrical properties of thin films of PbTe-Bi2Te3 solid solutions with compositions of 1,3,5 ml. % of Bi2Te3 deposited in an open vacuum on the sital substrates on their thickness d  (0,2-2) microns were studied. The effective mean free path  of charge carriers is defined and the dominant mechanism of scattering is found. The values of thermoelectric parameters of the near-surface layers are estimated within the two-layer Petritz model. It is stablished that condensate is characterized by a stable n-type conductivity, and there is a diffuse scattering on the surface that conditions a significant decrease in the magnitude of mobility (s), conductivity (s), and increase in the Seebeck coefficient (Ss) with respect to the film volume. The obtained results are explained by acceptor influence of atmospheric oxygen and throttling of charge carriers on potential barriers of the interfaces.

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