Anisotropic thermoelectric properties of layered compound SnSe 2

Xu, Peipei; Fu, Tao; Xin, Jiaojiao; Liu, Yintu; Ying, Pingjun; Zhao, Xinbing; Pan, Hongge; Zhu, Tiejun

doi:10.1016/j.scib.2017.11.015

Cited by 67 publications

(50 citation statements)

References 42 publications

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“…However, the reduction in lattice thermal conductivity along ab direction caused by Cl substitution is limited (10% reduction of κ L at room temperature) and even negligible at elevated temperatures. With respect to c direction, BiTeBr displays a significantly lower κ L compared to that along ab plane, and this is similar to other layered TE materials [ 46 , 47 ]. The overall low κ L in both the ab and c directions of BiTeBr is considered as partly related to its intrinsic low sound velocity, and this indicates weak chemical bonding in the system [ 20 , 26 ].…”

Section: Resultssupporting

confidence: 72%

Synthesis and thermoelectric properties of Rashba semiconductor BiTeBr with intensive texture

Xin

Shi

et al. 2018

Rare Met.

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Bismuth tellurohalides with Rashba-type spin splitting exhibit unique Fermi surface topology and are developed as promising thermoelectric materials. However, BiTeBr, which belongs to this class of materials, is rarely investigated in terms of the thermoelectric transport properties. In the study, polycrystalline bulk BiTeBr with intensive texture was synthesized via spark plasma sintering (SPS). Additionally, its thermoelectric properties above room temperature were investigated along both the in-plane and out-plane directions, and they exhibit strong anisotropy. Low sound velocity along two directions is found and contributes to its low lattice thermal conductivity. Polycrystalline BiTeBr exhibits relatively good thermoelectric performance along the in-plane direction, with a maximum dimensionless figure of merit (ZT) of 0.35 at 560 K. Further enhancements of ZT are expected by utilizing systematic optimization strategies.

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Section: Resultssupporting

confidence: 72%

Synthesis and thermoelectric properties of Rashba semiconductor BiTeBr with intensive texture

Xin

Shi

et al. 2018

Rare Met.

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“…However, these parameters are interrelated through carrier concentration and it is hard to adjust only one of them independently. Fortunately, owing to persevering pursuit, various decoupling strategies have been proposed and high performance TE materials have made a great progress [15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Approaching the minimum lattice thermal conductivity of p-type SnTe thermoelectric materials by Sb and Mg alloying

Xin

Zhu

et al. 2019

Science Bulletin

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“…As a result, the high ZT value of the bulk based on porous SnSe 0.8 S 0.2 nanosheets reaches 0.12 at 310 K. The substitution of the S atoms into SnSe and the fabrication of the SnSe 1−x S x NSs reduce the thermal conductivity by introducing phonon scattering in the atomic disorders and nanoscale boundaries, leading to a higher ZT. Similarly to SnSe, SnSe 2 is also a layered structure thermoelectric material and exhibits promising thermoelectric performance [156][157][158][159]. Saha et al fabricated ultrathin Cl-doped SnSe 2 nanosheets with the thickness of 3-5 nm via a simple low-temperature solvothermal process [159].…”

mentioning

confidence: 99%