Figure 2
From: Strong enhancement of phonon scattering through nanoscale grains in lead sulfide thermoelectrics
Thermoelectric properties as a function of temperature for PbS samples. (a) Electrical conductivity. (b) Seebeck coefficient. (c) Plot of ln(σT1/2) vs 1/(kT) for nano-PbS samples, along with a fit to Equation (2) to derive the energy barrier associated with grain boundary potential barrier scattering. The inset shows the electronic structure at the edges between two grains. (d) Power factor.
