Rapid preparation of Ge0.9Sb0.1Te1 x via unique melt spinning: Hierarchical microstructure and improved thermoelectric performance
Rapid preparation of Ge0.9Sb0.1Te1 x via unique melt spinning: Hierarchical microstructure and improved thermoelectric performance
复制标题
通过独特的熔体纺丝快速制备 Ge0.9Sb0.1Te1àx：分层微观结构和改进的热电性能
DOI：
10.1016/j.jallcom.2018.09.144
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发表时间：
2019
影响因子：
6.2
通讯作者：
Zhou Xiaoyuan
中科院分区：
文献类型：
--
作者：
Tan Huan;Zhang Bin;Wang Guoyu;Chen Yongjin;Shen Xingchen;Guo Lijie;Han Xiaodong;Lu Xu;Zhou Xiaoyuan
Thermoelectric semiconductors based on GeTe has been proved to be an important materials for converting waste heat into electricity. In this study, we demonstrate an enhancement of thermoelectric performance for p-type Ge0.9Sb0.1Te1+xby a unique melt spinning method combined with hot pressing (MS-HP), through which increased Seebeck coefficients and reduced thermal conductivities are achieved simultaneously. Moreover, the MS technique greatly gives rise to a variety of microstructures, such as the fine Ge precipitates, twins and nano-domains, all of which contribute to the significantly reduced thermal conductivities. Finally, the Ge0.9Sb0.1Te1.03reaches a maximumzTvalue of ∼1.9 at 760 K and a giant averagezTof ∼1.2 between 300 K and 820 K, which is comparable to the reported results for GeTe based materials. Combined with the rapid fabrication, Ge0.9Sb0.1Te1+xprepared by melt spinning process is an attractive p-type material for thermoelectric power generation application.
