Researchers optimize thermoelectric properties of lead telluride material systems

 https://phys.org/news/2022-11-optimize-thermoelectric-properties-telluride-material.html

"doping PbTe matrix with antimony... small amount of Cu12Sb4S13 nanoparticles... optimizing carrier concentration in n-type PbTe using host element doping, combining energy band engineering/energy filtering... semi-coherent nanophases... multi-scale defects to scatter phonons... improve power factor, reduce thermal conductivity, and increase thermoelectric... Pb0.97Sb0.03Te + 1.5 wt. % Cu12Sb4S13 thermoelectric properties with ZT of 1.58 (773 K)... improvement 75% compared with Pb0.97Sb0.03Te"

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https://phys.org/news/2023-01-method-thermoelectric-materials.html