Abstract
Measurements of the transport properties of Bi 2(Te 1− x Se x) 3 single crystal solid solutions with x = 0.025 and x = 0.05 are described as a function of deviations from stoichiometry. From measurements of the electrical and thermal conductivities, and the Seebeck coefficient at room temperature, a maximum in the figure of merit Z = 2.9 × 10 3 K −1 was determined for the solid solution containing 2.5% Bi 2Se 3. Analysis of the results allows us to present the main features of the band structure and the transport properties of these solid solutions.
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