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首页> 外文期刊>Applied Physics Letters >Transport properties of cubic crystalline Ge_2Sb_2Te_5: A potential low-temperature thermoelectric material
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Transport properties of cubic crystalline Ge_2Sb_2Te_5: A potential low-temperature thermoelectric material

机译：立方晶Ge_2Sb_2Te_5的传输性质：一种潜在的低温热电材料

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摘要

Ge_2Sb_2Te_5 (GST) has been widely used as a popular phase change material. In this study, we show that it exhibits high Seebeck coefficients 200-300 μV/K in its cubic crystalline phase (c-GST) at remarkably high p-type doping levels of ～1 × 10~(19)-6 × 10~(19)cm~(-3) at room temperature. More importantly, at low temperature (T = 200K), the Seebeck coefficient was found to exceed 200 μV/K for a doping range of 1 × 10~(19)-3.5 × 10~(19)cm~(-3). Given that the lattice thermal conductivity in this phase has already been measured to be extremely low (～0.7 W/m-K at 300 K) [K. S. Siegert et al., Rep. Prog. Phys. 78, 013001 (2015)], our results suggest the possibility of using c-GST as a low-temperature thermoelectric material.
机译：Ge_2Sb_2Te_5（GST）已被广泛用作流行的相变材料。在这项研究中，我们表明它在立方晶相（c-GST）中表现出高塞贝克系数200-300μV/ K，在〜1×10〜（19）-6×10〜的高p型掺杂水平下表现出很高的塞贝克系数。 （19）cm〜（-3）在室温下。更重要的是，在低温（T = 200K）下，对于1×10〜（19）-3.5×10〜（19）cm〜（-3）的掺杂范围，发现塞贝克系数超过200μV/ K。假设已经测量了该相中的晶格热导率（在300 K时约为0.7 W / m-K）[K。 S.Siegert等人，Rep。Prog.Chem.Soc。，2004，48，2593。物理78，013001（2015）]，我们的结果表明使用c-GST作为低温热电材料的可能性。

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  • 来源
    《Applied Physics Letters》 |2015年第12期|123907.1-123907.4|共4页
  • 作者

    Jifeng Sun; Saikat Mukhopadhyay; Alaska Subedi; Theo Siegrist; David J. Singh;

  • 作者单位

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA,Department of Chemical and Biomedical Engineering, College of Engineering, Florida Agricultural and Mechanical University-Florida State University, 2525 Pottsdamer St., Tallahassee, Florida 32310, USA,National High Magnetic Field Laboratory, 1800 E. Paul Dirac, Tallahassee, Florida 32310, USA;

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA;

    Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany;

    Department of Chemical and Biomedical Engineering, College of Engineering, Florida Agricultural and Mechanical University-Florida State University, 2525 Pottsdamer St., Tallahassee, Florida 32310, USA,National High Magnetic Field Laboratory, 1800 E. Paul Dirac, Tallahassee, Florida 32310, USA;

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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