Title :
Analysis of figure of merit of n-BibTe3-xSe x solid solution in dependence on anisotropy of constant energy surface
Author :
Vedernikov, M.V. ; Kutasov, V.A. ; Luk´yanova, L.N. ; Konstantinov, P.P.
Author_Institution :
A.F. Ioffe Physicotech. Inst., Acad. of Sci., St. Petersburg, Russia
Abstract :
The thermoelectric and galvanomagnetic properties were investigated in n-type Bi2Te3-xSex (0.12⩽x⩽0.36) solid solution in the temperature range 80-300 K. A correlation between figure of merit Z and parameters of the many-valley model is found with account of the anisotropy scattering approximation in Bi2Te3-xSex solid solution. It is shown that the decrease of anisotropy of the constant energy surface and anisotropy of the scattering process leads to increase of Z-value, especially in the low temperature range
Keywords :
bismuth compounds; galvanomagnetic effects; many-valley semiconductors; semiconductor materials; thermoelectricity; 80 to 300 K; Bi2(SeTe)3; Bi2Te3-xSex solid solution; Z-value; anisotropy; anisotropy scattering approximation; constant energy surface; figure of merit; galvanomagnetic properties; low temperature range; many-valley model; n-Bi2Te3-xSex solid solution; n-type Bi2Te3-xSex; scattering process; solid solution; thermoelectric properties; Acoustic scattering; Charge carrier density; Effective mass; Magneto electrical resistivity imaging technique; Scattering parameters; Solids; Tellurium; Temperature dependence; Temperature distribution; Thermoelectricity;
Conference_Titel :
Thermoelectrics, 1998. Proceedings ICT 98. XVII International Conference on
Conference_Location :
Nagoya
Print_ISBN :
0-7803-4907-5
DOI :
10.1109/ICT.1998.740332
