Thickness Effects for Thermoelectric Property of Antimony Telluride Nanoplatelets via Solvothermal Method.

Thickness Effects for Thermoelectric Property of Antimony Telluride Nanoplatelets via Solvothermal Method.
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溶剂热法厚度对碲化锑纳米片热电性能的影响

DOI:
10.1038/srep37722
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发表时间:
2016-11-29
期刊:
影响因子:
4.6
通讯作者:
Wang Z
Wang Z
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Yan X;Zheng W;Liu F;Yang S;Wang Z

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纳米结构具有通过调节和控制其尺寸和厚度来表现出良好的热电性能的潜力,并且可以通过设计界面和晶界来解耦竞争的电和热性能。在本研究中,具有不同尺寸的Sb 2 Te 3纳米片的制备使用一个实用的溶剂热方法。通过改变化学条件,可以在10 nm ~ 100 nm之间调节片晶的厚度,在1 ~ 10 μm之间调节片晶的相对边长。因此,操纵晶粒尺寸使其适合于有益于载流子输运,并且还阻挡薄片晶的声子,从而导致热导率的显著降低和电导率的同时增加。结果表明,优化的meritZT的数字,从0.2增加到1.0的薄样品,提供了一个全面的了解尺寸依赖的热电性能。
Nanostructures have the potential to exhibit good thermoelectric properties by tuning and controlling their size and thickness, and the competing electrical and thermal properties can be decoupled by engineering the interface and grain boundary. In the present study, Sb2Te3nanoplatelets with different sizes were fabricated using a practical solvothermal method. The thickness of the platelets were regulated between sizes of 10 nm and 100 nm, and the opposite edge length was varied between 1 and 10 μm by altering chemical conditions. Consequently, manipulating the grain size made it suitable to benefit the carrier transport and also block phonons for the thin platelets, resulting in a significant decrease in thermal conductivity and simultaneous increase in electrical conductivity. The results showed that the optimized figure of meritZT, increased from 0.2 to 1.0 for thin samples, providing a comprehensive understanding of size-dependent thermoelectric performance.
DOI: 10.1039/c5nr05279c
发表时间: 2016-02-14
期刊: NANOSCALE
影响因子: 6.7
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