Figure 1: Microstructures and thermoelectric properties.
From: Vacancy-induced dislocations within grains for high-performance PbSe thermoelectrics
Uniformly distributed dense dislocations in Pb0.95Sb0.033Se solid solution (a) and Pb0.97Sb0.02Se solid solution (b). The temperature-dependent lattice thermal conductivity (c) and thermoelectric figure of merit (d) for Pb1−xSb2x/3Se (x=0.01, 0.03, 0.04, 0.05 and 0.07) with or without Ag doping. The lattice thermal conductivity of PbSe36 (grey line) and estimated minimal lattice thermal conductivity (black line) are included for comparison. Dislocations due to cation vacancies lead to the lowest lattice thermal conductivity and the highest zT in PbSe thermoelectrics.
