Synthesis of SnTe/AgSbSe₂ nanocomposite as a promising lead-free thermoelectric material

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• 作者：Jun HeAuthor Vitae ; Jingtao Xu ; ^{xujingtao@nimte.ac.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Xiaojian Tan ; Guo-Qiang Liu ; ^{liugq@nimte.ac.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Hezhu Shao ; Zhu Liu ; Haochuan Jiang ; Jun Jiang ; ^{jjun@nimte.ac.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Thermoelectric ; Nanocomposite ; SnTe ; AgSbSe2
• 刊名：Journal of Materiomics
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：2
• 期：2
• 页码：165-171
• 全文大小：1765 K

文摘

A series of SnTe-AgSbSe₂ composites were synthesized by a zone-melting method. The nanostructure of the composites was determined by the high resolution transmission electron microscope. The results show that the lattice thermal conductivity is decreased to ∼0.6 W/m·K at 820 K due to the intense scattering of phonon. Also, the carrier concentration increases with AgSbSe₂ amounts, and a large effective mass of ∼ 4m₀ at room temperature appears at a high carrier concentration of ∼2 × 10²¹/cm³. A relatively high thermoelectric figure of merit ZT of 0.92 at 820 K is obtained by composition optimization. It is indicated that the SnTe-AgSbSe₂ composite should be a promising thermoelectric material.