Enhanced Thermoelectricity in High-Temperature β-Phase Copper(I) Selenides Embedded with Cu2Te Nanoclusters

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• 作者：Sajid Butt ; Wei Xu ; Muhammad U. Farooq ; Guang K. Ren ; Qinghua Zhang ; Yingcai Zhu ; Sajid U. Khan ; Lijuan Liu ; Meijuan Yu ; Fida Mohmed ; Yuanhua Lin ; Ce-Wen Nan
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：June 22, 2016
• 年：2016
• 卷：8
• 期：24
• 页码：15196-15204
• 全文大小：584K
• 年卷期：0
• ISSN：1944-8252

文摘

We report remarkably enhanced thermoelectric performance of Te doped Cu₂Se in midtemperature range. Through ball-milling process followed by spark plasma sintering (SPS), nanoscale Cu₂Te clusters were embeded in the matrix of Cu₂Se, inducing a drastic enhancement of thermoelectric performance by reducing the thermal conductivity without degrading the power factor. A large ZT value of 1.9 was achieved at 873 K for Cu₂Se_1.9Te_0.1, which is about 2 times larger than that of the pure Cu₂Se. The nanoscale heat management by Cu₂Te nanoclusters in superionic conductors opens up an avenue for thermoelectric materials research.