Thermoelectric Power of Solid Solutions (PbTe)_1–x(Bi₂Te₃)x with 0 ≦ x ≦ 0.02

Abstract

The thermoelectric power (Seebeck coefficient) S which is one of the parameters determining the figure of merit Z of thermoelectric materials is measured for polycrystalline (PbTe), -x(Bi,Te,), solid solutions as a function of temperature T (in the interval from 80 to 350 K) and composition x (in the range 0 5 x 5 0.02). The experimental results are analyzed on the basis of the two-band nonparabolic Kane model and the transport coefficient theory of A"BV' semiconductors. Some information on the phonon-drag term in this coefficient is specially extracted from the data.KOe@@AUAeHT TePMO-3.A.C. s XBJIReTCX OnHAM A 3 IIapaMeTpOB, OIIpeAeJIRIoI4AX TepMO3JICKTpAYeCKy€O 3@@eKTABHOCTb IIOJIyIIpOBOrHAKOBbIX MaTCpAaJIOB. Ero ACCJIenOBaHAe IIpeACTaBJIXeT 60n~u10G AHTepeC AJIR HayKA A TeXHOJIOTAII. B HaCTORrUe% p a 6 o~e naHa KaYeCTBeHHaR AHTepIIpeTaUAR 3aBACAMOCTH 3TOrO KO3@@AqHeHTa OT COCTaBa X A TeMIIepaTypbI T (B AHTepBaJIe OT 80 A 0 350 K) A IIOJIyYeHa AH@OPMaUHR 06 er0 @OHOHHOG COCTaBJIR€OI4& Sph AJIR IIOJIAKpACTaJIJIAYeCKHX TBepnbIX PaCTBOPOB (PbTe), -x(Bi,Te,), rne 0 2 X 5 0.02. ,&Is 3TOfi q e m liCIIOJIb30BaHbI AByX30HHaX HeIIapa-fjona~ec~an MOAeJIb KeiiHa A TeOpAR TPaHCIIOPTHbIX K03@@HUAeHTOB IIOJIyAIIpOBOAHAKOBbIX COenA-HeHAfi TAIIa A'"BV'.

Point defects and mechanisms for the formation of thermoelectrical solid solutions PbTe-Ві2Te3

“…Розчинність Bi 2 Te 3 в PbTe становить за даними різних авторів 5-10 мол. % [5][6][7][8][9][10]. На Рис.…”

Bismuth Telluride Solubility Limit and Dopant Effects on the Electronic Properties of Lead Telluride

“…One of the key methods for optimizing the electronic properties of these materials is by adding doping elements to the melt, while the most universally recognized lead telluride dopant is bismuth; it allows obtaining such carrier concentrations that can provide applicative values of thermoelectric conversion efficiency. The thermoelectric properties of the compounds in the system have been investigated, the processes taking place upon increasing the dopant concentration was also studied, but such researches were mainly focused on compositions within the solid solution up to the theoretical solubility limit [4,5].…”