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Enhancement of the Thermoelectric Figure-of-Merit in a Wide Temperature Range in ln_4Se_(3-x)Cl_(00)3 Bulk Crystals

机译：ln_4Se_（3-x）Cl_（00）3块状晶体在较宽温度范围内的热电品质因数提高

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摘要

Because of the increasing awareness of renewable energy issues, much attention has been devoted to thermoelectric energy harvesting technology. The dimensionless thermoelectric figure-of-merit is defined by ZT = S~2σT/k, where S, σ, T, and κ are the Seebeck coefficient, electrical conductivity, absolute temperature, and thermal conductivity, respectively. Regarding a high ZT, it has long been sought both by lowering the thermal conductivity by exploiting the phonon-glass and electron-crystal concept and by enhancing the power factor S~2σ by utilizing the quantum confinement effect in low-dimensional nanos-tructured materials. Recently, we proposed that the charge density wave represents a new direction for high thermoelectric performance in bulk crystalline materials. Low-dimensional electronic transport with strong electron-phonon coupling breaks the translational symmetry of the lattice because of the energy instability in a high-symmetry crystalline lattice.
机译：由于对可再生能源问题的认识不断提高，因此人们对热电能量收集技术投入了很多注意力。无因次热电品质因数定义为ZT = S〜2σT/ k，其中S，σ，T和κ分别为塞贝克系数，电导率，绝对温度和热导率。关于高ZT，长期以来一直在寻求通过利用声子玻璃和电子晶体概念来降低热导率，以及通过利用低维纳米结构材料中的量子约束效应来提高功率因数S〜2σ。 。最近，我们提出电荷密度波代表了块状晶体材料中高热电性能的新方向。由于高对称性晶格中的能量不稳定，具有强电子-声子耦合的低维电子传输会破坏晶格的平移对称性。

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  • 来源
    《Advanced Materials》 |2011年第19期|p.2191-2194|共4页
  • 作者

    Jong-Soo Rhyee; Kyunghan Ahn; Kyu Hyoung Lee; Hyo Seokji; Ji-Hoon Shim;

  • 作者单位

    Department of Applied Physics College of Applied Science Kyung Hee University Seocheon-dong, Giheung-gu, Yongin-si, Gyeonggi-do 446-701 Republic of Korea;

    Advanced Materials Research Center Samsung Advanced Institute of TechnologyNongseo-dong 14-1, Ciheung-gu, Yongin-si, Cyeonggi-do 446-712,Republic of Korea;

    Advanced Materials Research Center Samsung Advanced Institute of TechnologyNongseo-dong 14-1, Ciheung-gu, Yongin-si, Cyeonggi-do 446-712,Republic of Korea;

    Department of Chemistry Pohang University of Science and Technology San 31, Hyojadong, Namgu, Pohang,Gyungbuk 790-784, Republic of Korea;

    Department of Chemistry Pohang University of Science and Technology San 31, Hyojadong, Namgu, Pohang,Gyungbuk 790-784, Republic of Korea;

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