Hierarchical Architecturing for Layered Thermoelectric Sulfides and Chalcogenides.
Hierarchical Architecturing for Layered Thermoelectric Sulfides and Chalcogenides.
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DOI：
10.3390/ma8031124
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发表时间：
2015-03-16
期刊：
影响因子：
--
通讯作者：
Ohta M
中科院分区：
文献类型：
--
作者：
Jood P;Ohta M
硫化物是一种环境友好、成本低廉的热电材料。在这篇文章中，我们回顾了最近的进展，在所有长度尺度的硫化物和硫属化合物的分级结构，突出的关键策略，用于提高其热电性能。我们主要关注TiS 2基层状硫化物、错配层状硫化物、同源硫属化合物、手风琴状层状Sn硫属化合物和热电矿物。CS2硫化法是制备硫化物热电材料的一种合适方法。在原子尺度上，客体原子/层嵌入到主体晶体层中、由同系系列实现的晶体结构演化以及低能原子振动有效地散射声子，导致晶格热导率降低。在纳米尺度下，堆垛层错进一步降低晶格热导率。在微观尺度上，高度取向的微织构允许在面内方向上的高载流子迁移率，从而导致高的热电功率因数。
Sulfides are promising candidates for environment-friendly and cost-effective thermoelectric materials. In this article, we review the recent progress in all-length-scale hierarchical architecturing for sulfides and chalcogenides, highlighting the key strategies used to enhance their thermoelectric performance. We primarily focus on TiS2-based layered sulfides, misfit layered sulfides, homologous chalcogenides, accordion-like layered Sn chalcogenides, and thermoelectric minerals. CS2 sulfurization is an appropriate method for preparing sulfide thermoelectric materials. At the atomic scale, the intercalation of guest atoms/layers into host crystal layers, crystal-structural evolution enabled by the homologous series, and low-energy atomic vibration effectively scatter phonons, resulting in a reduced lattice thermal conductivity. At the nanoscale, stacking faults further reduce the lattice thermal conductivity. At the microscale, the highly oriented microtexture allows high carrier mobility in the in-plane direction, leading to a high thermoelectric power factor.