Sn_(x)Se_(y):一类具有发展潜力的新型热电材料  

Sn_(x)Se_(y):New promising thermoelectric materials

作　　者：朱雨墨 常诚 裴延玲 Yumo Zhu;Cheng Chang;Yanling Pei(Tianmushan Laboratory,Hangzhou 311115,China)

机构地区：[1]天目山实验室,杭州311115

出　　处：《科学通报》2025年第6期697-704,共8页Chinese Science Bulletin

基　　金：国家自然科学基金(52371090);航空发动机及燃气轮机基础科学中心重大项目(P2021-A-IV-001-003)资助。

摘　　要：热电材料是一种通过声子和载流子定向运输实现热能和电能相互转化的新型能源材料,具有可靠性高、无传动组件等优势,被广泛应用于航空航天及5G通讯等领域.在寻找理想的热电材料过程中,研究人员将目光转向了地壳中包含丰富元素的材料,如锡硒化合物(Sn_(x)Se_(y)).其中一个被广泛研究的化合物是硒化锡(SnSe),其被认为是迄今为止最有前景的热电材料之一.此外,二硒化锡(SnSe_(2))也是一种具有发展潜力的热电材料.本文首先简要介绍了SnSe和SnSe_(2)的研究成果,然后对SnSe/SnSe_(2)复合材料以及新型Sn_(2)Se_(3)的热电性能进行了总结,最后指出了Sn_(2)Se_(3)热电材料领域的一些研究挑战及发展前景.Traditional fossil fuels,which are finite and have high thermal losses,necessitate the development of new energy materials for waste heat recovery.As the world continues to grapple with energy shortages and environmental concerns,finding sustainable and efficient energy solutions has become a priority.Among these solutions,thermoelectric materials have gained significant attention over the past few decades due to their unique properties.These materials stand out because of their modularity and noiseless operation,making them promising candidates for power generation and refrigeration.The efficiency of thermoelectric materials is primarily determined by the dimensionless figure of merit(ZT),which is a measure of a material’s ability to convert heat into electricity.ZT depends on three key parameters:The Seebeck coefficient,electrical conductivity,and thermal conductivity.Achieving high ZT values is essential for the practical application of thermoelectric materials.High ZT values require materials that exhibit both low thermal conductivity and high electrical conductivity.However,this is a challenging issue to achieve.Metals,which typically have high electrical conductivity,also have high thermal conductivity,making them less efficient for thermoelectric applications.On the other hand,ceramics,which have low thermal conductivity,generally suffer from poor electrical performance.In the search for ideal thermoelectric materials,researchers have turned their attention to elements that are abundant in the Earth’s crust,such as tin(Sn)and selenium(Se).These elements not only are plentiful but also exhibit properties that are conducive to thermoelectric applications.One compound that has been extensively studied is tin selenide(SnSe).SnSe has garnered interest due to its remarkable thermoelectric performance,particularly in its p-type semiconductor form.It has been reported to have a high ZT value of 2.6 at 923 K,making it one of the most promising thermoelectric materials discovered to date.In addition to SnSe,tin

关 键 词：热电材料 SnSe SnSe_(2) Sn_(2)Se_(3) 

分 类 号：TB34[一般工业技术—材料科学与工程]