Room-temperature pressure-induced nanostructural CuInTe2 thermoelectric material with low thermal conductivity

Atsuko Kosuga, Kouhei Umekage, Mie Matsuzawa, Yasuhiro Sakamoto, Ikuya Yamada

研究成果: Article査読

25 被引用数 (Scopus)

抄録

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-Callaway 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.

本文言語English
ページ(範囲)6844-6849
ページ数6
ジャーナルInorganic chemistry
53
13
DOI
出版ステータスPublished - 2014 7 7

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 無機化学

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