Scalable solution-based synthesis of component-controllable ultrathin PbTe1-xSex nanowires with high n-type thermoelectric performance
Scalable solution-based synthesis of component-controllable ultrathin PbTe1-xSex nanowires with high n-type thermoelectric performance
复制标题
具有高 n 型热电性能的成分可控超薄 PbTe1-xSex 纳米线的可扩展溶液合成
DOI：
10.1039/c6ta09189j
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发表时间：
2017
影响因子：
11.9
通讯作者：
Qiao GJ
中科院分区：
文献类型：
--
作者：
Zhou CJ;Shi ZQ;Ge BZ;Wang K;Zhang DL;Liu GW;Qiao GJ
碲化铅一维纳米结构是热电材料的重要候选材料，其组分和性质的可控性一直是一个挑战。在此，我们报告了一种新的方法，用于可扩展的基于溶液的合成组分可控的PbTe（PbTe 1-xSex，0 <= x <= 0.5）的单相三元纳米线（NW），其用作制造块体纳米结构TE材料的构建块。出乎意料的是，Se掺杂剂稳定了纳米线，并有利于在体内部形成独特的长程有序纳米网络结构，这导致在643 K下的峰值品质因数（ZT）为1.1，在300-673 K范围内的平均ZT为0.9，这是针对n型纳米结构的PbTe基材料报道的最高值之一。
As an important candidate for thermoelectric (TE) applications, the preparation of PbTe-based one-dimensional nanostructures with controllable components and properties remains a challenge. Herein, we report a new approach for the scalable solution-based synthesis of component-controllable ultrathin Se-doped PbTe (PbTe1-xSex, 0 <= x <= 0.5) single-phase ternary nanowires (NWs), which serve as building blocks for fabricating bulk nanostructured TE materials. Unexpectedly, Se dopant stabilized the NWs and favored the formation of a unique long-range-ordered nanonetwork structure inside the bulk, which led to a peak figure of merit (ZT) of 1.1 at 643 K and an average ZT of 0.9 in the range of 300-673 K, which was one of the highest values reported for the n-type nanostructured PbTe-based materials.