Room-Temperature Pressure-Induced Nanostructural CuInTe2 Thermoelectric Material with Low Thermal Conductivity

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• 作者：Atsuko Kosuga ; Kouhei Umekage ; Mie Matsuzawa ; Yasuhiro Sakamoto ; Ikuya Yamada
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：July 7, 2014
• 年：2014
• 卷：53
• 期：13
• 页码：6844-6849
• 全文大小：384K
• ISSN：1520-510X

文摘

A room-temperature high-pressure synthesis method is proposed as an alternative way to induce nanoscale structural disorder in the bulk thermoelectric CuInTe₂ matrix. This disorder stems from the coexistence of distinct domains with different degrees and geometries of disorder at Cu/In cation sites. The lattice thermal conductivity of high-pressure-treated CuInTe₂ is substantially less than that of hot-pressed CuInTe₂. The Debye鈥揅allaway model reveals that the reduced lattice thermal conductivity is mainly attributed to disorder at the Cu/In cation sites and stacking faults, which were probably created during formation of the high-pressure-treated phases. This study demonstrates that room-temperature high-pressure synthesis can produce a radical change in the crystal structure and physical properties of conventional thermoelectric materials.