Thermoelectric performance of nanostructured In/Pb codoped SnTe with band convergence and resonant level prepared via a green and facile hydrothermal method
Thermoelectric performance of nanostructured In/Pb codoped SnTe with band convergence and resonant level prepared via a green and facile hydrothermal method
复制标题
通过绿色简便的水热法制备具有能带收敛和谐振能级的纳米结构In/Pb共掺杂SnTe的热电性能
DOI：
10.1039/d0nr00495b
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发表时间：
2020
期刊：
影响因子：
6.7
通讯作者：
Guodong Tang
中科院分区：
文献类型：
--
作者：
Wenqi Lu;Tiantian He;Shuang Li;Xinru Zuo;Yao Zheng;Xunuo Lou;Jian Zhang;Di Li;Jizi Liu;Guodong Tang
SnTe is considered as a promising alternative to the conventional high-performance thermoelectric material PbTe, which inspired the thermoelectric community for a while. Here, we design a green, facile and low-energy-intensity hydrothermal route without involving any toxic or unstable chemicals to fabricate SnTe-based thermoelectric materials. Ultralow lattice thermal conductivity and enhanced thermoelectric performance are achieved via the combination of band engineering and nanostructuring. Enhanced Seebeck coefficient and power factor are induced by converging the band structure and creating resonant levels due to Pb and In doping. More importantly, due to the reduced grain sizes, nanoparticles, and dual-atom point defect scattering, ultralow lattice thermal conductivity was obtained in the bulk samples fabricated by the hydrothermal route. Benefiting from the enhanced power factor and significantly reduced thermal conductivity, the peak ZT is enhanced to ∼0.7 in In/Pb codoped SnTe, a 60% improvement over pure SnTe.
