Jian He

Clemson University

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i-10 index

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Co-Authors

Terry M. Tritt

Clemson University

Apparao M. Rao

Clemson University

David Mandrus

Oak Ridge National Laboratory

Dale Hitchcock

United States Department of Energy

Rongying Jin

University of South Carolina

Ramakrishna Podila

Clemson University

Tiejun Zhu

Zhejiang University

Xinbing Zhao

PLA Army Engineering University

Menghan Zhou

First Affiliated Hospital of Shihezi University Medical College

Xinfeng Tang

Wuhan University of Technology

Cooperative Institutions

Clemson University

134

Chinese Academy of Sciences

128

University of Chinese Academy of Sciences

Zhejiang University

Oak Ridge National Laboratory

Wuhan University of Technology

University of Tennessee at Knoxville

University of Science and Technology Beijing

Materials Science & Engineering

Shanghai Jiao Tong University

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Hot deformation induced bulk nanostructuring of unidirectionally grown p-type (Bi,Sb)2Te3 thermoelectric materials

Journal of Materials Chemistry A (2013)

Tiejun Zhu Zhaojun Xu Jian He Junjie Shen Song Zhu

Nanostructuring has proved effective in improving the figure of merit in the widely used Bi2Te3 based thermoelectric materials. In this work, a hot deformation induced in situ nanostructuring process is directly applied to the commercial unidirectionally grown p-type Bi0.5Sb1.5Te3 ingots to explore the possibility of commercial application of the "top down" nanostructuring approach, and the thermoelectric properties are investigated over a wide temperature range of 15 K to 520 K. In comparison to the commercial zone melted ingot and the hot pressed sample, it is found that the hot deformed samples exhibit much less texture and significantly reduced lattice thermal conductivity due to in situ formed nanostructures and defects. A high ZT of ∼1.3 is achieved near room temperature, ∼50% improvement compared to that of the zone melted ingot. The hot deformation process thus provides a promising top down approach to prepare high performance Bi2Te3 based thermoelectric materials in a way that is more readily incorporated into the existing procedure of device manufacturing.

Ingot

Texture (cosmology)

Bismuth telluride

Figure of Merit

Atmospheric temperature range

10.1039/c3ta12764h

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Citations (126)

Synthesis, crystal structure, optoelectric properties and theoretical study of three perovskite-like iodobismuthate charge-transfer salts based on butylpyridinium

Journal of Solid State Chemistry (2021)

You‐Yu Wang Li Song Ze‐Qi Dai Junchen Xu Jian He

Photocurrent

10.1016/j.jssc.2021.122611

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Citations (7)

Nonlinear optical signatures of the tensor order in Cd2Re2O7

Nature Physics (2006)

Jesse C. Petersen Michael D. Caswell J. Steven Dodge И. В. Сергиенко Jian He

Magnon

Thermal fluctuations

10.1038/nphys392

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Citations (48)

Thermoelectric Device

Springer eBooks (2012)

Nezih Pala Ahmad Nabil Abbas Carsten Rockstuhl Christoph Menzel Stefan Mühlig

10.1007/978-90-481-9751-4_100846

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Citations (7)

Anomalous thermal conductivity of alkaline-earth-metal-substituted EuTiO3 induced by resonant scattering

Materials Today Physics (2023)

Xingxing Xiao Wenjie Xie Kai Philippi Yamei Liu Konstantin Skokov

Orthorhombic crystal system

Phonon scattering

Atmospheric temperature range

Lattice (music)

Alkaline earth metal

Anomalous scattering

10.1016/j.mtphys.2023.101132

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Citations (1)

Leveraging Deep Levels in Narrow Bandgap Bi_0.5Sb_1.5Te₃ for Record‐High zT_ave Near Room Temperature

Advanced Functional Materials (2020)

Lipeng Hu Fanchen Meng Yanjie Zhou Jibiao Li Allen Benton

Abstract Deep levels in a narrow bandgap semiconductors are considered detrimental to their electrical performance. Here the constructive role of Indium‐induced deep levels in regulating the majority and minority carriers for state‐of‐the‐art average thermoelectric figure‐of‐merit zT ave between 300 and 500 K in narrow bandgap p‐type (Bi,Sb) 2 Te 3 is reported. Two compositional series in the pseudo‐ternary Bi 2 Te 3 ‐Sb 2 Te 3 ‐In 2 Te 3 phase diagram: Bi 0.475− x Sb 1.525 In x Te 3 (0 ≤ x ≤ 0.15) and Bi 0.475 Sb 1.525− y In y Te 3 (0 ≤ y ≤ 0.10), namely, the x ‐series and y ‐series are explored. In the x ‐series, the combined experimental and theoretical study shows that Indium doping induced donor‐like and acceptor‐like deep levels, enlarges the band gap, and flattens the conduction band edge, thereby weakening the temperature dependence of Seebeck coefficient and the bipolar heat conduction. Further doping the x ‐series with copper (aka shallow acceptors) to optimize the majority carrier concentration leads to a state‐of‐the‐art zT ≈ 1.61 at 390 K and record‐high average zT ave ≈ 1.47 between 300 and 500 K in p‐type Bi 0.396 Sb 1.525 In 0.075 Cu 0.004 Te 3 . These results attest to the efficacy of deep levels in narrow bandgap thermoelectrics for both power generation and solid‐state refrigeration near room temperature.

Figure of Merit

10.1002/adfm.202005202

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Citations (85)

High temperature thermoelectric properties of skutterudite-Bi2Te3 nanocomposites

Intermetallics (2016)

Jiangying Peng Jin Zheng Fanhao Shen Kuo Zhang Jian He

Skutterudite

Hot pressing

10.1016/j.intermet.2016.06.007

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Citations (10)

Multiple-scattering approach to near-edge X-ray absorption fine structure of CO/NiO(100) and NO/NiO(100)

Physical Chemistry Chemical Physics (2000)

Fen-Ling Zhuang Jiancheng Tang Jian He Lianbang Wang

The carbon and nitrogen 1s near-edge X-ray absorption fine structure (NEXAFS) of CO/NiO(100) and NO/NiO(100) were calculated by the multiple-scattering cluster (MSC) method. The calculation shows that the shape resonance in C 1s NEXAFS spectra is attributed to the photoelectron scattered between the carbon atom and the substrate, and the weak features near the π-resonance are caused by the shake-up effect. R-factor calculation demonstrates for the first time that the CO molecule is adsorbed at the asymmetric bridge site of the NiO(100) surface; the adsorption height of the carbon atom in the CO molecule is equal to 0.31±0.01 nm. Our MSC calculation supports former ab initio studies and the experimental results, i.e., CO/NiO(100) is a physisorption system, while NO/NiO(100) is a weak chemisorption system.

XANES

Non-blocking I/O

Physisorption

Chemisorption

10.1039/b001712o

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Citations (5)

CSD 1785089: Experimental Crystal Structure Determination

The Cambridge Structural Database (2013)

J. Palmer West Dino Sulejmanovic Gregory Becht Jian He Dale Hitchcock

An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the joint CCDC and FIZ Karlsruhe Access Structures service and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Crystal (programming language)

10.25505/fiz.icsd.cc1xxjjw

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Citations (0)

CCDC 2078802: Experimental Crystal Structure Determination

The Cambridge Structural Database (2022)

Shengsheng Lu Xie Xi Jianan Hu Haixing Lin Fangfang Li

10.5517/ccdc.csd.cc27s54c

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Citations (0)