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We report about detailed dimensionless figure of merit ($ZT$) calculated by using Fermi integral method (compared with Bi$_2$Te$_3$, CoSb$_3$, and SrTiO$_3$) for thermoelectric (TE) materials' design and its module application.…

材料科学 · 物理学 2020-03-05 Hirofumi Kakemoto

Substitution of Cu for Ni in the Kondo lattice system CeNi$_2$Al$_3$ results in a simultaneous optimization of the three interdependent thermoelectric parameters: thermoelectric power, electrical and thermal conductivities, where the…

强关联电子 · 物理学 2015-05-14 Peijie Sun , Tusyoshi Ikeno , Toshio Mizushima , Yosikazu Isikawa

We calculate the thermoelectric figure of merit, zT=S^2GT/(\kappa_l+\kappa_e), for p-type Si nanowires with axial Ge heterostructures using a combination of first-principles density-functional theory, interatomic potentials, and…

材料科学 · 物理学 2011-11-29 Matthew Shelley , Arash A. Mostofi

Low-dimensional electronic and glassy phononic transport are two important ingredients of highly-efficient thermoelectric material, from which two branches of the thermoelectric research emerge. One focuses on controlling electronic…

材料科学 · 物理学 2015-07-14 Xue-Ya Mi , Xiaoxiang Yu , Kai-Lun Yao , Xiaoming Huang , Nuo Yang , Jing-Tao Lü

Enhancing the dimensionless figure of merit zT is central to developing better thermoelectric materials and advancing thermoelectric generation technology. However, the intrinsic interdependence between electrical conductivity, the Seebeck…

材料科学 · 物理学 2024-12-20 D. Beretta

The Hall and Seebeck coefficients, electrical resistivity and thermal conductivity of polycrystalline NiSi3P4 were characterized from 2 to 775K. Undoped NiSi3P4 behaves like a narrow gap semiconductor, with activated electrical resistivity…

材料科学 · 物理学 2013-03-18 Andrew F. May , Michael A. McGuire , Hsin Wang

Polycrystalline samples of Er$_{1-x}$Ho$_x$NiSb ($x$ = 0, 0.2, 0.3, 0.5, 0.7, 0.8, 1) were characterized by means of x-ray powder diffraction (XRD), scanning electron microscopy (SEM), and optical metallography. The results proved the…

Graphite nanofibers (GNFs) have been demonstrated to be a promising material for hydrogen storage and heat management in electronic devices. Here, by means of first-principles and transport simulations, we show that GNFs can also be an…

介观与纳米尺度物理 · 物理学 2017-09-15 Van-Truong Tran , Jérôme Saint-Martin , Philippe Dollfus , Sebastian Volz

Lattice parameter, electronic structure, mechanical and thermodynamic properties of ThN are systematically studied using the projector-augmented-wave method and the generalized gradient approximation based on the density functional theory.…

材料科学 · 物理学 2015-05-20 Yong Lu , Dafang Li , Bao-Tian Wang , Rong-Wu Li , Ping Zhang

As a result of suppressed phonon conduction, large improvements of the thermoelectric figure of merit, ZT, have been recently reported for nanostructures compared to the raw materials' ZT values. It has also been suggested that low…

介观与纳米尺度物理 · 物理学 2011-04-11 Neophytos Neophytou , Hans Kosina

We study the linear thermoelectric response of a quantum dot embedded in a constriction of a quantum Hall bar with fractional filling factors nu=1/m within Laughlin series. We calculate the figure of merit ZT for the maximum efficiency at a…

介观与纳米尺度物理 · 物理学 2018-02-21 Pablo Roura-Bas , Liliana Arrachea , Eduardo Fradkin

We report an investigation of temperature- and doping-dependent thermoelectric behaviors of topological semimetal Cd3As2. The electrical conductivity, thermal conductivity, Seebeck coefficient, and figure of merit (ZT) are calculated by…

材料科学 · 物理学 2016-11-22 Tong Zhou , Cheng Zhang , Huisheng Zhang , Faxian Xiu , Zhongqin Yang

The effective transport coefficients and figure of merit ZT for anisotropic systems are derived from a macroscopic formalism. The full tensorial structure of the transport coefficients and the effect of the sample boundaries are included.…

材料科学 · 物理学 2007-05-23 W. E. Bies , R. J. Radtke , H. Ehrenreich

In this work, we investigate thermoelectric properties of junctions consisting of two partially overlapped graphene sheets coupled to each other in the cross-plane direction. It is shown that because of the weak van-der Waals interactions…

介观与纳米尺度物理 · 物理学 2014-10-07 V. Hung Nguyen , M. Chung Nguyen , Huy-Viet Nguyen , J. Saint-Martin , P. Dollfus

The field of thermoelectric materials has undergone a revolutionary transformation over the last couple of decades as a result of the ability to nanostructure and synthesize myriads of materials and their alloys. The ZT figure of merit,…

This study presents a measurement method for determining the figure of merit for transverse thermoelectric conversion ($ z_\mathrm{T}T $) in thin film forms. Leveraging the proposed methodology, we comprehensively investigate the transverse…

Two-dimensional thermoelectric materials with a figure of merit $ZT$, which is greater than 2.0 at room temperature, would be highly desirable in energy conversion since the efficiency is competitive to conventional energy conversion…

材料科学 · 物理学 2019-07-24 Shenghui Zhang , Xiaobin Niu , Yiqun Xie , Kui Gong , Hezhu Shao , Yibin Hu , Yin Wang

Magneli phase Ti5O9 ceramics with 200-nm grain-size were fabricated by hot-pressing nanopowders of titanium and anatase TiO2 at 1223 K. The thermoelectric properties of these ceramics were investigated from room temperature to 1076 K. We…

材料科学 · 物理学 2016-02-26 Sudeep Jung Pandey , Giriraj Joshi , Shidong Wang , Stefano Curtarolo , Romain Gaume

In this work, we report the fabrication of a high temperature measurement setup to measure Figure of merit (ZT). This setup facilitates the simultaneous measurement of Seebeck coefficient ({\alpha}), thermal conductivity (\kappa), and…

仪器与探测器 · 物理学 2018-01-09 Ashutosh Patel , Sudhir K. Pandey

High performance thermoelectric materials for wide-range temperature applications still remains a challenge. In this study, we have produced high-quality homogeneous $In_{0.32}Ga_{0.68}N$ on ZnO substrates, with no phase separation at high…

材料科学 · 物理学 2019-07-25 Yining Feng , Evan Witkoske , Bahadir Kucukgok , Yee Rui Koh , Ali Shakouri , Ian T. Ferguson , Na Lu