Giant Thermoelectric Power Factor Anisotropy in PtSb1.4Sn0.6

Yu Liu; Zhixiang Hu; Michael O Ogunbunmi; Eli Stavitski; Klaus Attenkofer; Svilen Bobev; Cedomir Petrovic

doi:10.1021/acs.inorgchem.2c02218

Giant Thermoelectric Power Factor Anisotropy in PtSb_1.4Sn_0.6

Inorg Chem. 2022 Aug 29;61(34):13586-13590. doi: 10.1021/acs.inorgchem.2c02218. Epub 2022 Aug 16.

Authors

Yu Liu, Zhixiang Hu¹, Michael O Ogunbunmi², Eli Stavitski, Klaus Attenkofer, Svilen Bobev², Cedomir Petrovic¹

Affiliations

¹ Materials Science and Chemical Engineering Department, Stony Brook University, Stony Brook, New York 11790, United States.
² Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States.

PMID: 35972888
DOI: 10.1021/acs.inorgchem.2c02218

Abstract

We report on the giant anisotropy found in the thermoelectric power factor (S²σ) of marcasite structure-type PtSb_1.4Sn_0.6 single crystal. PtSb_1.4Sn_0.6, synthesized using an ambient pressure flux growth method upon mixing Sb and Sn on the same atomic site, is a new phase different from both PtSb₂ and PtSn₂, which crystallize in the cubic Pa3̅ pyrite and Fm3̅m fluorite unit cell symmetry, respectively. The large difference in S²σ for heat flow applied along different principal directions of the orthorhombic unit cell stems mostly from anisotropic Seebeck coefficients.