Research / 2020 / Article / Fig 9

Review Article

Defects Engineering with Multiple Dimensions in Thermoelectric Materials

Figure 9

Introduction of reducing lattice thermal conductivity via inducing defects with multiple dimensions. (a) Schematic diagram of full-frequency phonon scattering that originated from frequency-dependent phonon scattering characteristics of defects with different dimensions. (b) Temperature dependence of lattice thermal conductivity in PbTe with different defects (NG: nanograins; MG: mesograins; NP: nanoprecipitates), which shows the feasibility of inducing multiple dimensional defects to reduce lattice thermal conductivity. Data are from Ref. [20, 145, 146].