热电材料
热导率
热电效应
材料科学
表征(材料科学)
塞贝克系数
声子
声子散射
空位缺陷
凝聚态物理
固体物理学
超晶格
碲化铋
电阻率和电导率
光电子学
散射
结晶学
纳米技术
化学
复合材料
物理
热力学
量子力学
作者
Shinşuke Yamanaka,Manabu Ishimaru,Anek Charoenphakdee,Hideaki Matsumoto,Ken Kurosaki
标识
DOI:10.1007/s11664-008-0654-6
摘要
The key properties for the design of high-efficiency thermoelectric materials are a low thermal conductivity and a large Seebeck coefficient with moderate electrical conductivity. Recent developments in nanotechnology and nanoscience are leading to breakthroughs in the field of thermoelectrics. The goal is to create a situation where phonon pathways are disrupted due to nanostructures in “bulk” materials. Here we introduce promising materials: (Ga,In)2Te3 with unexpectedly low thermal conductivity, in which certain kinds of superlattice structures naturally form. Two-dimensional vacancy planes with approximately 3.5-nm intervals exist in Ga2Te3, scattering phonons efficiently and leading to a very low thermal conductivity.
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