Revisiting thermoelectric transport properties through a band nonparabolicity factor.

ABSTRACT: Thermoelectric materials are advanced functional semiconductors for the forthcoming era of energy conversion. The development in this field critically depends on the understanding of their band structures. However, many analyses rely on the parabolic band model that oversimplifies the realistic electron behavior. Such simplification leads to significant deviations in the predicted behavior of electrical transport properties due to the non-local characteristics of the Seebeck coefficient and the Lorenz number. This study introduces a nonparabolicity factor ξ, which quantitatively measures the deviations from parabolic dispersion in semiconductor band structures and can also directly predict the thermoelectric performance change induced by the band nonparabolicity. Notably, our result

SUBMITTER: Zhu J 

PROVIDER: S-EPMC12236334 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature