The Role of Ionized Impurity Scattering on the Thermoelectric Performances of Rock Salt AgPbmSnSe2+m

Pan L, Mitra S, Zhao LD, Shen Y, Wang Y, Felser C, Berardan D (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Advanced Functional Materials Wiley-VCH Verlag

Book Volume: 26

Pages Range: 5149-5157

Journal Issue: 28

DOI: 10.1002/adfm.201600623

Abstract

This study reports on the successful synthesis and on the properties of polycrystalline AgPbmSnSe2+ m (m = ∞, 100, 50, 25) samples with a rock salt structure. Between ≈160 and ≈400 K, the dominant scattering process of the carriers in this system changes from acoustic phonon scattering in PbSe to ionized impurity scattering in AgPbmSnSe2+ m, which synergistically optimizes electrical and thermal transport properties. Thanks to the faint amount of AgSnSe2, the Seebeck coefficient is enhanced by boosting the scattering factor, the electric conductivity is improved by the increase of the concentration of holes coupled to a limited degradation of their mobility, and the total thermal conductivity is reduced by suppressing bipolar thermal conductivity. Therefore, ZT of AgPbmSnSe2+ m (m = 50) reaches 1.3 at 889 K. The mechanism suggested in this study opens new paths to improve the thermoelectric performances of other families of materials.

Involved external institutions

NanJing Tech University CN China (CN) Beihang University, Beijing University of Aeronautics and Astronautics (BUAA) / 北京航空航天大学 CN China (CN) University of Paris 11 - Paris-Sud / Université Paris XI Paris-Sud FR France (FR) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE)

How to cite

APA:

Pan, L., Mitra, S., Zhao, L.-D., Shen, Y., Wang, Y., Felser, C., & Berardan, D. (2016). The Role of Ionized Impurity Scattering on the Thermoelectric Performances of Rock Salt AgPbmSnSe2+m. Advanced Functional Materials, 26(28), 5149-5157. https://doi.org/10.1002/adfm.201600623

MLA:

Pan, Lin, et al. "The Role of Ionized Impurity Scattering on the Thermoelectric Performances of Rock Salt AgPbmSnSe2+m." Advanced Functional Materials 26.28 (2016): 5149-5157.

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