High carrier mobility and ultralow thermal conductivity in the synthetic layered superlattice Sn₄Bi₁₀Se₁₉

Abstract

The integration within the same crystal lattice of two or more structurally and chemically distinct building units enables the design of complex materials featuring the coexistence of dissimilar functionalities. Here...

Synthesis and Characterization of New Multinary Selenides A10B18Se37 (A=Sn/Pb; B=In/Sb/Bi)

“…Seebeck coefficients in 300 ~773 K remain in negative values of about À 190 to À 250 μV/K, indicating n-type semiconducting behavior (Figure 4b). The observed values are about 1/3 compared to the value from Sn 4 In 5 Sb 9 Se 25 and Sn 6.13 Pb 1.87 In 5.00 Sb 10.12 Bi 2.88 Se 35 and comparable with those of some ternary and quaternary selenides such as GeSb 2 Se 3 , [48] Sn 4 Bi 10 Se 19 , [43][44] Pb 7 Bi 4 Se 13 , [29][30] Pb 6 Bi 2 Se 9 , [45] In 0.2 Sn 6 Bi 1.8 Se 9 , [36] and Pb 4 In x M 6 À x Se 13 (M=Sb, Bi). [49] The reduced Seebeck coefficient can be attributed to the increase in electric conductivity with the effect of heavy element substitution.…”

“…Chalcogenides with the structure feature of NaCl 100 ‐ and NaCl 111 ‐types units were reported in minerals and artificial chalcogenides with varies sizes, such as Cu 2 Pb 6 Bi 8 S 19 (Felbertalite), [41] Cu 2 Pb 16 Bi 20 S 28.12 Se 18.38 (Proudite), [42] Cu 2 Pb 3 Bi 8 S 13.2 Se 2.8 (Junoite), [46] Sn 4 Bi 10 Se 19 , [43–44] and A m [M 1+l Se 2+l ] 2m [M 2l+n Se 2+3l+n ] homologous series [47] . A proposed Cu sulfosalts Cu 2 M 28 S 37 was reported by Mumme et al [42] .…”

“…Overall, the MÀ Se contacts are in agreement with the interatomic distance of MÀ Se from known phases including ternary selenides and multinary compounds. [29][30][32][33][43][44][45] Chalcogenides with the structure feature of NaCl 100 -and NaCl 111 -types units were reported in minerals and artificial chalcogenides with varies sizes, such as Cu 2 Pb 6 Bi 8 S 19 (Felbertalite), [41] Cu 2 Pb 16 Bi 20 S 28.12 Se 18.38 (Proudite), [42] Cu 2 Pb 3 Bi 8 S 13.2 Se 2.8…”

“…(Junoite), [46] Sn 4 Bi 10 Se 19 , [43][44] and A m [M 1 + l Se 2 + l ] 2m [M 2l + n Se 2 + 3l + n ] homologous series. [47] A proposed Cu sulfosalts Cu 2 M 28 S 37 was reported by Mumme et al [42] However, there is no further report on the mineral or synthetic compounds with the proposed composition.…”

Thermal Management Systems and Waste Heat Recycling by Thermoelectric Generators—An Overview

“…However, thermal conductivities can be modified via microstructural manipulation to increase the heat carriers scattering and reduce thermal conductivities. Significant efforts by the TE community over the last few decades have been concentrated on various techniques to improve thermoelectric properties, based on modifying S, σ, and κ [53][54][55][56][57], such as nanostructuring [58][59][60][61]. For instance, Figure 8 illustrates the impact of microstructure through changes in particle morphology on the thermoelectric properties, including electrical conductivity, Seebeck coefficients, lattice thermal conductivity, and power factor.…”