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Keywords:

  • composite materials;
  • nanostructures;
  • semiconductors;
  • thermoelectric materials
Thumbnail image of graphical abstract

Co-nanostructuring of PbTe with two kinds of metallic nanoparticles (Pb and Sb) can significantly increase its power factor at high temperatures (up to 87 % at 700 K; see picture, ZT=figure of merit). The electrical conductivity is dramatically increased at high temperatures without degrading the thermopower. This emergent synergy results only when both Pb and Sb nanocrystals are present.