BixSb2−xTe3 nanoplates with enhanced thermoelectric performance due to sufficiently decoupled electronic transport properties and strong wide-frequency phonon scatterings
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- 作者：Min HongaAuthor Vitae ; Zhi G. Chena ; z.chen1@uq.edu.au" class="auth_mail" title="E-mail the corresponding authorAuthor Vitae ; Lei YangaAuthor Vitae ; Jin Zoua ; b ; j.zou@uq.edu.au" class="auth_mail" title="E-mail the corresponding authorAuthor Vitae
- 关键词：BixSb2&minus ; xTe3 nanoplates ; Microwave-assisted solvothermal ; Thermoelectric ; Decoupling factor ; Phonon scattering
- 刊名：Nano Energy
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：20
- 期：Complete
- 页码：144-155
- 全文大小：5935 K
文摘
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Large-scale BixSb2−xTe3 nanoplates with enlarged ZT are successfully synthesized by the rapid microwave-assisted solvothermal method.
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Based on simulation studies using band engineering, the decoupling factor for Seebeck coefficient and electrical conductivity is found.
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Compositional tuning in BixSb2−xTe3 nanoplates enables to reduce the decoupling factor and optimize the reduced Fermi level, resulting in an enhanced powder-factor.
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High-density dislocations, grain boundaries in conjunction with lattice disorders achieve the strong wide-frequency phonon scattering, leading to an ultra-low thermal conductivity.