Abstract

The paper presents the results of a study of the electron paramagnetic resonance (EPR) and thermoelectric properties in the temperature range 77 < T < 350 K of single-crystal Sb_{2 – x}Cu_xTe₃ (x = 0, 0.01, 0.03, 0.05, 0.07, 0.10) samples synthesized by the Bridgman method. EPR measurements show that copper atoms in the studied samples are most likely in the Cu⁺¹ spinless state. The hole concentration and conductivity increase strongly, and the Seebeck coefficient slightly decreases upon doping of Sb₂Te₃ with copper. The thermal conductivity of the samples doped with Cu is slightly higher than that of the initial Sb₂Te₃. As a result, thermoelectric efficiency ZT increases with increasing Cu content at T > 300 K.

中文翻译：

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热电 Sb2 中铜的电荷态 – xCuxTe3

摘要

本文介绍了在 77 < T < 350 K温度范围内单晶 Sb _{2 – x} Cu _x Te ₃ ( x = 0, 0.01, 0.03, 0.05, 0.07, 0.10) 通过布里奇曼方法合成的样品。EPR 测量表明，所研究样品中的铜原子最有可能处于 Cu ⁺¹无自旋状态。用铜掺杂Sb ₂ Te _{3 后}，空穴浓度和电导率显着增加，塞贝克系数略微降低。掺杂 Cu 的样品的热导率略高于初始 Sb 的热导率₂特₃。因此，当T > 300 K 时，热电效率ZT随着 Cu 含量的增加而增加。