热电材料SnSe的性能与研究进展综述

Review of SnSe's thermoelectric performance and the research progress

SnSe是近年来新兴的热电材料,由于其具有层状结构、极低的热导率和较高的ZT值,在中低温阶段是一种很有应用前景的热电材料,因而受到极大的关注。本文对SnSe的分子结构、能带结构、输运性能、热电性能特点进行了概述,分析了不同制备方法的优劣,讨论了影响其热电性能和工业化应用的因素,并尝试提出了利用"马赛克"晶体的特点来优化其热电性能的方法。旨在帮助读者对SnSe的结构特点、输运性能和热电性能有一个全面的了解,同时为科研工作者探索提高SnSe的热电性能、寻找具备高ZT值热电材料提供一个可能的方向。

SnSe is a new thermoelectric material which just emerges in recent years. Sinceit haslayered structure,very low thermal conductivity and high ZT,it is a prospect of thermoelectric materials for application in the middle and low temperature range. Thus much attention is paid to optimize its thermoelectric performance. In this review,the SnSe's molecular structure,band structure and transport properties,thermoelectric characteristics were summarized,the advantages and disadvantages of different processing methods were analyzed; the factors which affected its thermal performance and industrial application were discussed. At last we try to put forward to using the advantage of " Mosaic" crystal to optimize the SnSe's thermoelectric performance. The purpose of this review is to help readers to have a comprehensive understanding of SnSe's structure,transport properties and thermoelectric characteristics. Meanwhile,for researchers,we aid to provide a possible direction which can improve the SnSe's thermoelectric performance and search for thermolelectric materials which can gain high ZT.