Strategies for optimizing the thermoelectricity of PbTe alloys
Zhai Jinze †, Wang Teng †, Wang Hongchao ‡, Su Wenbin, Wang Xue, Chen Tingting, Wang Chunlei §
       

(color online) (a) Reduced lattice thermal conductivities and (b) zT values for SPS samples with the multi-scale hierarchical architecture compared with ingot samples. (c) The schematic view of zT ∼ 1.1 for atomic scale phonon scattering, zT ∼ 1.7 for atomic and nanoscale phonon scattering and zT ∼ 2.2 for all-scale phonon scattering.[6]