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Lee S, Jung SJ, Park GM, Na MY, Kim KC, Hong J, Lee AS, Baek SH, Kim H, Park TJ, Kim JS, Kim SK. Selective Dissolution-Derived Nanoporous Design of Impurity-Free Bi 2 Te 3 Alloys with High Thermoelectric Performance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2205202. [PMID: 36634999 DOI: 10.1002/smll.202205202] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 12/10/2022] [Indexed: 06/17/2023]
Abstract
Thermoelectric technology, which has been receiving attention as a sustainable energy source, has limited applications because of its relatively low conversion efficiency. To broaden their application scope, thermoelectric materials require a high dimensionless figure of merit (ZT). Porous structuring of a thermoelectric material is a promising approach to enhance ZT by reducing its thermal conductivity. However, nanopores do not form in thermoelectric materials in a straightforward manner; impurities are also likely to be present in thermoelectric materials. Here, a simple but effective way to synthesize impurity-free nanoporous Bi0.4 Sb1.6 Te3 via the use of nanoporous raw powder, which is scalably formed by the selective dissolution of KCl after collision between Bi0.4 Sb1.6 Te3 and KCl powders, is proposed. This approach creates abundant nanopores, which effectively scatter phonons, thereby reducing the lattice thermal conductivity by 33% from 0.55 to 0.37 W m-1 K-1 . Benefitting from the optimized porous structure, porous Bi0.4 Sb1.6 Te3 achieves a high ZT of 1.41 in the temperature range of 333-373 K, and an excellent average ZT of 1.34 over a wide temperature range of 298-473 K. This study provides a facile and scalable method for developing high thermoelectric performance Bi2 Te3 -based alloys that can be further applied to other thermoelectric materials.
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Affiliation(s)
- Seunghyeok Lee
- Electronic Materials Research Center, Korea Institute of Science and Technology Seoul, Seoul, 02792, South Korea
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, 15588, South Korea
| | - Sung-Jin Jung
- Electronic Materials Research Center, Korea Institute of Science and Technology Seoul, Seoul, 02792, South Korea
| | - Gwang Min Park
- Electronic Materials Research Center, Korea Institute of Science and Technology Seoul, Seoul, 02792, South Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, South Korea
| | - Min Young Na
- Advanced Analysis and Data Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Kwang-Chon Kim
- Electronic Materials Research Center, Korea Institute of Science and Technology Seoul, Seoul, 02792, South Korea
| | - Junpyo Hong
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea
- Convergence Research Center for Solutions to Electromagnetic Interference in Future-mobility, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Albert S Lee
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea
- Convergence Research Center for Solutions to Electromagnetic Interference in Future-mobility, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Seung-Hyub Baek
- Electronic Materials Research Center, Korea Institute of Science and Technology Seoul, Seoul, 02792, South Korea
- Department of Materials Science and Engineering, Yonsei University, Seoul, 03722, South Korea
- Yonsei-KIST Convergence Research Institute, Seoul, 02792, South Korea
- Nanomaterials Science & Engineering, KIST School, Korea University of Science and Technology, Seoul, 02792, South Korea
| | - Heesuk Kim
- Soft Hybrid Materials Research Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Tae Joo Park
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, 15588, South Korea
| | - Jin-Sang Kim
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Wanju, 55324, South Korea
| | - Seong Keun Kim
- Electronic Materials Research Center, Korea Institute of Science and Technology Seoul, Seoul, 02792, South Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, South Korea
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Ju Z, Crawford C, Adamczyk J, Toberer ES, Kauzlarich SM. Study of the Thermoelectric Properties of Bi 2Te 3/Sb 2Te 3 Core-Shell Heterojunction Nanostructures. ACS APPLIED MATERIALS & INTERFACES 2022; 14:24886-24896. [PMID: 35580304 DOI: 10.1021/acsami.2c03011] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Thermoelectric materials convert heat energy into electricity, hold promising capabilities for energy waste harvesting, and may be the future of sustainable energy utilization. In this work, we successfully synthesized core-shell Bi2Te3/Sb2Te3 (BTST) nanostructured heterojunctions via a two-step solution route. Samples with different Bi2Te3 core to Sb2Te3 shell ratios could be synthesized by controlling the reaction precursors. Scanning electron microscopy images show well-defined hexagonal nanoplates and the distinct interfaces between Bi2Te3 and Sb2Te3. The similarity of the area ratios with the precursor ratios indicates that the growth of the Sb2Te3 shell mostly took place on the lateral direction rather than the vertical. Transmission electron microscopy revealed the crystalline nature of the as-synthesized Bi2Te3 core and Sb2Te3 shell. Energy-dispersive X-ray spectroscopy verified the lateral growth of a Sb2Te3 shell on the Bi2Te3 core. Thermoelectric properties were measured on pellets obtained from powders via spark plasma sintering with two different directions, in-plane and out-of-plane, showing anisotropic properties due to the nanostructure alignment in the pellets. All samples showed a degenerate semiconducting character with the electrical resistivity increasing with the temperature. Starting from Sb2Te3, the electrical resistivity increases with the increase in amounts of Bi2Te3. Thermal conductivity is lowered due to the increase in interfaces and additional phonon scattering. We show that the out-of-plane direction of the BTST 1-3 sample (where 1-3 indicates the ratio of BT to ST) demonstrates a high Seebeck value of 145 μV/K at 500 K which may be attributed to an energy filtering effect across the heterojunction interfaces. The highest overall zT is observed for the BTST 1-3 sample in the out-of-plane direction at 500 K. The zT values increase continuously over the measured temperature range, indicating a probable higher value at increased temperatures.
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Affiliation(s)
- Zheng Ju
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California 95616, United States
| | - Caitlin Crawford
- Department of Physics, Colorado School of Mines, 1500 Illinois Street, Golden, Colorado 80401, United States
| | - Jesse Adamczyk
- Department of Physics, Colorado School of Mines, 1500 Illinois Street, Golden, Colorado 80401, United States
| | - Eric S Toberer
- Department of Physics, Colorado School of Mines, 1500 Illinois Street, Golden, Colorado 80401, United States
| | - Susan M Kauzlarich
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California 95616, United States
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Akhanda MS, Rezaei SE, Esfarjani K, Krylyuk S, Davydov AV, Zebarjadi M. Thermomagnetic properties of Bi 2Te 3 single crystal in the temperature range from 55 K to 380 K. PHYSICAL REVIEW MATERIALS 2021; 5:10.1103/PhysRevMaterials.5.015403. [PMID: 34250434 PMCID: PMC8268759 DOI: 10.1103/physrevmaterials.5.015403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Magneto-thermoelectric transport provides an understanding of coupled electron-hole-phonon current in topological materials and has applications in energy conversion and cooling. In this work, we study the Nernst coefficient, the magneto-Seebeck coefficient, and the magnetoresistance of single-crystalline Bi2Te3 under external magnetic field in the range of -3 T to 3 T and in the temperature range of 55 K to 380 K. Moreau's relation is employed to justify both the overall trend of the Nernst coefficient and the temperature at which the Nernst coefficient changes sign. We observe a non-linear relationship between the Nernst coefficient and the applied magnetic field in the temperature range of 55 K to 255 K. An increase in both the Nernst coefficient and the magneto-Seebeck coefficient is observed as the temperature is reduced which can be attributed to the increased mobility of the carriers at lower temperatures. First-principles density functional theory calculations were carried out to physically model the experimental data including electronic and transport properties. Simulation findings agreed with the experiments and provide a theoretical insight to justify the measurements.
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Affiliation(s)
- Md Sabbir Akhanda
- Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, Virginia 22904, USA
| | - S. Emad Rezaei
- Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, Virginia 22904, USA
| | - Keivan Esfarjani
- Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904, USA
- Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, USA
- Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA
| | - Sergiy Krylyuk
- Material Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - Albert V. Davydov
- Material Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - Mona Zebarjadi
- Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, Virginia 22904, USA
- Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904, USA
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Kim D, Du R, Yu SY, Yin Y, Dong S, Li Q, Mohney SE, Li X, Tadigadapa S. Enhanced thermoelectric efficiency in nanocrystalline bismuth telluride nanotubes. NANOTECHNOLOGY 2020; 31:365703. [PMID: 32470964 DOI: 10.1088/1361-6528/ab97d2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report on the thermal and thermoelectric properties of individual nanocrystalline Bi2 Te3 nanotubes synthesized by the solution phase method using 3ω method and a microfabricated testbench. Measurements show that the nanotubes offer improved ZT compared to bulk Bi2Te3 near room temperature due to an enhanced Seebeck coefficient and suppressed thermal conductivity. This improvement in ZT originates from the nanocrystalline nature and low dimensionality of the nanotubes. Domain boundary filtering of low-energy electrons provides an enhanced Seebeck coefficient. The scattering of phonons at the surface of the nanotube leads to suppressed thermal conductivity. These have been theoretically analyzed using the Boltzmann equation based on the relaxation time approximation and Landauer approach. This work clearly demonstrates the possibility of achieving enhancement in thermoelectric efficiency by combining nanocrystalline and low-dimensional systems.
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Affiliation(s)
- DukSoo Kim
- Samsung Electronics, 129 Samsung ro, Suwon-Si, Gyeonggi-Do 443-742, Republic of Korea
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Liu Y, Zhang Y, Lim KH, Ibáñez M, Ortega S, Li M, David J, Martí-Sánchez S, Ng KM, Arbiol J, Kovalenko MV, Cadavid D, Cabot A. High Thermoelectric Performance in Crystallographically Textured n-Type Bi 2Te 3- xSe x Produced from Asymmetric Colloidal Nanocrystals. ACS NANO 2018; 12:7174-7184. [PMID: 29966413 DOI: 10.1021/acsnano.8b03099] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the present work, we demonstrate crystallographically textured n-type Bi2Te3- xSe x nanomaterials with exceptional thermoelectric figures of merit produced by consolidating disk-shaped Bi2Te3- xSe x colloidal nanocrystals (NCs). Crystallographic texture was achieved by hot pressing the asymmetric NCs in the presence of an excess of tellurium. During the hot press, tellurium acted both as lubricant to facilitate the rotation of NCs lying close to normal to the pressure axis and as solvent to dissolve the NCs approximately aligned with the pressing direction, which afterward recrystallize with a preferential orientation. NC-based Bi2Te3- xSe x nanomaterials showed very high electrical conductivities associated with large charge carrier concentrations, n. We hypothesize that such large n resulted from the presence of an excess of tellurium during processing, which introduced a high density of donor TeBi antisites. Additionally, the presence in between grains of traces of elemental Te, a narrow band gap semiconductor with a work function well below Bi2Te3- xSe x, might further contribute to increase n through spillover of electrons, while at the same time blocking phonon propagation and hole transport through the nanomaterial. NC-based Bi2Te3- xSe x nanomaterials were characterized by very low thermal conductivities in the pressing direction, which resulted in ZT values up to 1.31 at 438 K in this direction. This corresponds to a ca. 40% ZT enhancement from commercial ingots. Additionally, high ZT values were extended over wider temperature ranges due to reduced bipolar contribution to the Seebeck coefficient and the thermal conductivity. Average ZT values up to 1.15 over a wide temperature range, 320 to 500 K, were measured, which corresponds to a ca. 50% increase over commercial materials in the same temperature range. Contrary to most previous works, highest ZT values were obtained in the pressing direction, corresponding to the c crystallographic axis, due to the predominance of the thermal conductivity reduction over the electrical conductivity difference when comparing the two crystal directions.
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Affiliation(s)
- Yu Liu
- Catalonia Energy Research Institute - IREC , Sant Adria de Besòs , 08930 Barcelona , Spain
| | - Yu Zhang
- Catalonia Energy Research Institute - IREC , Sant Adria de Besòs , 08930 Barcelona , Spain
| | - Khak Ho Lim
- Department of Chemical and Biological Engineering , Hong Kong University of Science and Technology , Hong Kong , China
| | - Maria Ibáñez
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog Weg 1 , CH-8093 Zürich , Switzerland
- Empa-Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland
| | - Silvia Ortega
- Catalonia Energy Research Institute - IREC , Sant Adria de Besòs , 08930 Barcelona , Spain
| | - Mengyao Li
- Catalonia Energy Research Institute - IREC , Sant Adria de Besòs , 08930 Barcelona , Spain
| | - Jérémy David
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and BIST , Campus UAB , Bellaterra, 08193 Barcelona , Catalonia Spain
| | - Sara Martí-Sánchez
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and BIST , Campus UAB , Bellaterra, 08193 Barcelona , Catalonia Spain
| | - Ka Ming Ng
- Department of Chemical and Biological Engineering , Hong Kong University of Science and Technology , Hong Kong , China
| | - Jordi Arbiol
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and BIST , Campus UAB , Bellaterra, 08193 Barcelona , Catalonia Spain
- ICREA Pg. Lluis Companys 23 , 08010 Barcelona , Spain
| | - Maksym V Kovalenko
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog Weg 1 , CH-8093 Zürich , Switzerland
- Empa-Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland
| | - Doris Cadavid
- Catalonia Energy Research Institute - IREC , Sant Adria de Besòs , 08930 Barcelona , Spain
- Departamento de Física , Universidad Nacional de Colombia , Ciudad Universitaria, 111321 Bogotá , Colombia
| | - Andreu Cabot
- Catalonia Energy Research Institute - IREC , Sant Adria de Besòs , 08930 Barcelona , Spain
- ICREA Pg. Lluis Companys 23 , 08010 Barcelona , Spain
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Khajepour A, Rahmani F. An approach to design a 90 Sr radioisotope thermoelectric generator using analytical and Monte Carlo methods with ANSYS, COMSOL, and MCNP. Appl Radiat Isot 2017; 119:51-59. [PMID: 27842232 DOI: 10.1016/j.apradiso.2016.11.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 10/22/2016] [Accepted: 11/04/2016] [Indexed: 11/16/2022]
Affiliation(s)
- Abolhasan Khajepour
- Department of Radiation Application, Shahid Beheshti University, P.O. Box 1983963113, Tehran, Iran
| | - Faezeh Rahmani
- Department of Physics, K.N. Toosi University of Technology, P.O. Box 15875-4416, Tehran, Iran.
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Puneet P, Podila R, Karakaya M, Zhu S, He J, Tritt TM, Dresselhaus MS, Rao AM. Preferential scattering by interfacial charged defects for enhanced thermoelectric performance in few-layered n-type Bi2Te3. Sci Rep 2013; 3:3212. [PMID: 24225424 PMCID: PMC3827612 DOI: 10.1038/srep03212] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Accepted: 10/28/2013] [Indexed: 11/09/2022] Open
Abstract
Over the past two decades several nano-structuring methods have helped improve the figure of merit (ZT) in the state-of-the art bulk thermoelectric materials. While these methods could enhance the thermoelectric performance of p-type Bi2Te3, it was frustrating to researchers that they proved ineffective for n-type Bi2Te3 due to the inevitable deterioration of its thermoelectric properties in the basal plane. Here, we describe a novel chemical-exfoliation spark-plasma-sintering (CE-SPS) nano-structuring process, which transforms the microstructure of n-type Bi2Te3 in an extraordinary manner without compromising its basal plane properties. The CE-SPS processing leads to preferential scattering of electrons at charged grain boundaries, and thereby increases the electrical conductivity despite the presence of numerous grain boundaries, and mitigates the bipolar effect via band occupancy optimization leading to an upshift (by ~ 100 K) and stabilization of the ZT peak over a broad temperature range of ~ 150 K.
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Affiliation(s)
- Pooja Puneet
- Department of Physics and Astronomy, Clemson University, Clemson, South Carolina, SC 29634 USA
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Pettes MT, Maassen J, Jo I, Lundstrom MS, Shi L. Effects of surface band bending and scattering on thermoelectric transport in suspended bismuth telluride nanoplates. NANO LETTERS 2013; 13:5316-22. [PMID: 24164564 DOI: 10.1021/nl402828s] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A microdevice was used to measure the in-plane thermoelectric properties of suspended bismuth telluride nanoplates from 9 to 25 nm thick. The results reveal a suppressed Seebeck coefficient together with a general trend of decreasing electrical conductivity and thermal conductivity with decreasing thickness. While the electrical conductivity of the nanoplates is still within the range reported for bulk Bi2Te3, the total thermal conductivity for nanoplates less than 20 nm thick is well below the reported bulk range. These results are explained by the presence of surface band bending and diffuse surface scattering of electrons and phonons in the nanoplates, where pronounced n-type surface band bending can yield suppressed and even negative Seebeck coefficient in unintentionally p-type doped nanoplates.
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Affiliation(s)
- Michael Thompson Pettes
- Department of Mechanical Engineering and Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712, United States
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Qu DX, Hor YS, Cava RJ. Quantum oscillations in magnetothermopower measurements of the topological insulator Bi2Te3. PHYSICAL REVIEW LETTERS 2012; 109:246602. [PMID: 23368356 DOI: 10.1103/physrevlett.109.246602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Indexed: 06/01/2023]
Abstract
We report the magnetothermopower measurements of the nonmetallic topological insulator Bi(2)Te(3) in magnetic fields up to 35 T. Quantum oscillations arising from surface states are observed in both thermoelectric and conductivity tensors. The inferred surface thermopower has a peak magnitude ~1 mV/K possibly as a result of surface electron and bulk phonon interaction. At the n = 1 Landau level, we resolve additional quantum oscillations signaling Landau sublevels.
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Affiliation(s)
- Dong-Xia Qu
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
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Nolas GS, Sharp J, Goldsmid HJ. Review of Established Materials and Devices. THERMOELECTRICS 2001. [DOI: 10.1007/978-3-662-04569-5_5] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Muragi BD, Zope JK. X-ray diffraction infrared absorption studies of Bi-Se-Te system. ACTA ACUST UNITED AC 1984. [DOI: 10.1007/bf00719917] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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