The current work provides a comparative study of the thermoelectric properties of the SnGeTe phases doped with Sb and Bi and alloyed with CuTe. The SnGeTe composition was chosen based on the fact that it delivers the highest ZT value within the SnGeTe series (x≤ 0.5). Doping SnGeTe with electron-richer Sb and Bi improves both the charge transport properties and thermal conductivities. Alloying with CuTe optimizes the thermoelectric performance of the samples even further, yielding a ZT value of 0.99 for (SnGe)BiTe(CuTe) at 500 °C. Hall measurements were performed to understand the effects of doping and alloying.
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