High thermoelectric performance and compatibility in Cu3SbSe4–CuAlS2 composites

Developing a non-toxic tellurium-free alternative for PbTe is crucial for large-scale waste heat recovery. Here we demonstrate that a simple Cu3SbSe4–CuAlS2 composite can reach a peak zT of 1.8 and an average zT of 0.77 in the temperature range of 300–723 K, both of which are the record-high values...

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