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Thermoelectric properties of layered NaSbSe2
Aditya Putatunda1, Guangzong Xing1,2, Jifeng Sun1
1Department of Physics and Astronomy, University of Missouri, Columbia, MO 65211-7010, United States of America.
None:
We investigate ordered monoclinic NaSbSe2 as a thermoelectric using first principles calculations. We find that from an electronic point of view, ordered and oriented n-type NaSbSe2 is comparable to the best known thermoelectric materials. This phase has a sufficiently large band gap for thermoelectric and solar absorber applications in contrast to the disordered phase which has a much narrower gap. The electronic structure shows anisotropic, non-parabolic bands. The results show a high Seebeck coefficient in addition to direction dependent high conductivity. The electronic structure quantified by an electron fitness function is very favorable, especially in the n-type case.
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