Here we reveal low-cost polycrystalline antimonides for even more efficient thermoelectric waste-heat recovery within 600 K than regular tellurides. That is enabled by a design of Ni/Fe/Mg3SbBi and Ni/Sb/CdSb contacts for both equally a prevention of chemical diffusion and a very low interfacial resistivity, realizing a report and stable module https://hydrocarbonheatpumps57891.blogacep.com/36361195/not-known-details-about-hydrocarbon-heat-pumps