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Ternary selenides A₂Sb₄Se₈ (A = K, Rb and Cs) as an n-type thermoelectric material with high power factor and low lattice thermal conductivity: importance of the conformationally flexible Sb-Se-Se-Sb bridges.

ABSTRACT: We investigated the thermoelectric properties of the layered ternary selenides A₂Sb₄Se₈ (A = K, Rb and Cs) and the lattice thermal conductivity of K₂Sb₄Se₈ on the basis of DFT calculations, to find that these selenides are a high-performance n-type thermoelectric material. The Seebeck coefficients and power factors calculated for the electron carriers of A₂Sb₄Se₈ (A = K, Rb and Cs) are greater than those of the well-known thermoelectric materials Bi₂Te₃ and PbTe. The lattice thermal conductivity κ _latt of K₂Sb₄Se₈ is comparable to that of PbTe, well-known for its low lattice thermal conductivity. In terms of both electro

SUBMITTER: Lee C

PROVIDER: S-EPMC9051912 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature

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Ternary selenides A₂Sb₄Se₈ (A = K, Rb and Cs) as an n-type thermoelectric material with high power factor and low lattice thermal conductivity: importance of the conformationally flexible Sb-Se-Se-Sb bridges.

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Ternary selenides A2Sb4Se8 (A = K, Rb and Cs) as an n-type thermoelectric material with high power factor and low lattice thermal conductivity: importance of the conformationally flexible Sb-Se-Se-Sb bridges.

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Ternary selenides A₂Sb₄Se₈ (A = K, Rb and Cs) as an n-type thermoelectric material with high power factor and low lattice thermal conductivity: importance of the conformationally flexible Sb-Se-Se-Sb bridges.