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影响因子：16.6

DOI码：10.1021/jacs.6b07010

发表刊物：Journal of the American Chemical Society

关键字：Crystal structure; Electrical conductivity; Materials; Thermal conductivity; Thermoelectric materials

摘要：Solid-state thermoelectric technology, interconverting heat to electrical energy, offers a promising solution for relaxing global energy problems. A high dimensionless figure of merit ZT is desirable for high-efficiency thermoelectric power generation. To date, thermoelectric materials research has focused on increasing the material’s ZT. Here we first fabricated phase-separated Sn1–xPbxSe materials by hydrothermal synthesis. We demonstrate that the simultaneous optimization of the power factor and significant reduction in thermal conductivity can be achieved in the phase-separated Sn1–xPbxSe material. The introduction of the PbSe phase contributes to improvement of the electrical conductivity and power factor of the SnSe phase. Meanwhile, nanoscale precipitates and mesoscale grains define all-scale hierarchical architectures to scattering phonons, leading to low lattice thermal conductivity. These two favorable factors lead to remarkably high thermoelectric performance with ZT ∼ 1.7 at 873 K in polycrystalline SnSe + 1% PbSe along the pressing direction, which is a record-high ZT for SnSe polycrystals. These findings highlight the prospects of realizing highly effective solid-state thermoelectric devices.

合写作者：Wei Wei, Yusheng Li, Xiang Wang, Guizhou Xu, Cheng Chang, Zhihe Wang, Youwei Du

第一作者：Guodong Tang

论文类型：期刊论文

通讯作者：Guodong Tang,Jian Zhang, Li-Dong Zhao

学科门类：工学

文献类型：J

卷号：138

期号：41

页面范围：13647-13654

是否译文：否

发表时间：2016-10-19

收录刊物：SCI

发布期刊链接：https://pubs.acs.org/doi/full/10.1021/jacs.6b07010