Influence of thermal conductivity and of non-constant relaxation time on thermoelectricity in Mg3Sb2
Journal of Physics Conference Series(2019)
摘要
We discuss the effects of different approximations to thermal conductivity and relaxation time on the thermoelectric figure of merit ZT in n-doped Mg3Sb2. We use density-functional electronic structure and Bloch-Boltzmann transport theory with an energy-dependent relaxation time. ZT is monotonically increasing with T in our range (300-700 K) with a maximum value of similar to 1.5.
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