Solvothermal synthesis of wire-like SnxSb2Te3+x with an enhanced thermoelectric performance
Solvothermal synthesis of wire-like SnxSb2Te3+x with an enhanced thermoelectric performance
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溶剂热合成具有增强热电性能的线状 SnxSb2Te3 x
DOI：
10.1039/c6dt00974c
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发表时间：
2016
影响因子：
4
通讯作者：
Huang Rong
中科院分区：
文献类型：
--
作者：
Yang Heng Quan;Miao Lei;Liu Cheng Yan;Wang Xiao Yang;Peng Ying;Zhang Ai Juan;Zhou Xiao Yuan;Wang Guo Yu;Li Chao;Huang Rong
纳米结构碲化物在热电废热回收和冷却装置中的应用引起了越来越多的关注。在这里，我们报告的线状SnxSb2Te3+x（x = 0，0.02和0.05）纳米粒子的合成使用元素前体在EG中。通过在Sb 3+亚晶格处掺入Sn 2+，增加了重价带谷中的载流子数量，从而增强了合金样品的热电性能，从而能够沿着实现低电阻率、高塞贝克系数以及热导率的下降。因此，提高的功率因数和低热导率导致Sn 0.02Sb2Te3.02样品在150 °C下的最高ZT值为0.58。我们的研究为一维纳米材料的制备提供了一条通用的湿化学路线，并可能促进Sb2Te3基材料在低温下的实际热电应用。
Nanostructured tellurides have attracted increasing attention in thermoelectric applications for waste heat recovery and cooling devices. Here, we report on the synthesis of wire-like SnxSb2Te3+x (x = 0, 0.02 and 0.05) nanoparticles using elemental precursors in EG. The enhanced thermoelectric performance was achieved in alloyed samples due to the increase of carrier population in heavy valence band valleys by incorporating Sn2+ at the Sb3+ sublattice, enabling the simultaneous realization of low electrical resistivity along with a high Seebeck coefficient as well as the decline of thermal conductivity. Thus a boosted power factor and low thermal conductivity lead to the highest ZT value of 0.58 at 150 °C in the Sn0.02Sb2Te3.02 sample. Our research offers a general wet-chemical route for the preparation of one-dimensional nanomaterials and probably promotes the practical thermoelectric applications of Sb2Te3-based materials at low temperatures.