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Zuo J, Bi J, He S, Jin W, Yu X, He K, Dai W, Lu C. Unexpected thermal transport properties of MgSiO 3monolayer at extreme conditions. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:335702. [PMID: 38684164 DOI: 10.1088/1361-648x/ad44fa] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 04/29/2024] [Indexed: 05/02/2024]
Abstract
The thermal transport properties of mantle minerals are of paramount importance to understand the thermal evolution processes of the Earth. Here, we perform extensively structural searches of two-dimensional MgSiO3monolayer by CALYPSO method and first-principles calculations. A stable MgSiO3monolayer withPmm2 symmetry is uncovered, which possesses a wide indirect band gap of 4.39 eV. The calculations indicate the lattice thermal conductivities of MgSiO3monolayer are 49.86 W (mK)-1and 9.09 W (mK)-1inxandydirections at room temperature. Our findings suggest that MgSiO3monolayer is an excellent low-dimensional thermoelectric material with highZTvalue of 4.58 from n-type doping in theydirection at 2000 K. The unexpected anisotropic thermal transport of MgSiO3monolayer is due to the puckered crystal structure and the asymmetric phonon dispersion as well as the distinct electron states around the Fermi level. These results offer a detailed description of structural and thermal transport properties of MgSiO3monolayer at extreme conditions.
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Affiliation(s)
- Jingning Zuo
- School of Mathematics and Physics, China University of Geosciences (Wuhan), Wuhan 430074, People's Republic of China
| | - Jie Bi
- School of Mathematics and Physics, China University of Geosciences (Wuhan), Wuhan 430074, People's Republic of China
| | - Shi He
- School of Mathematics and Physics, China University of Geosciences (Wuhan), Wuhan 430074, People's Republic of China
| | - Wenyuan Jin
- Institute of Physics, Henan Academy of Sciences, Zhengzhou 450046, People's Republic of China
| | - Xin Yu
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, People's Republic of China
| | - Kaihua He
- School of Mathematics and Physics, China University of Geosciences (Wuhan), Wuhan 430074, People's Republic of China
| | - Wei Dai
- School of Mathematics and Physics, Jingchu University of Technology, Jingmen 448000, People's Republic of China
| | - Cheng Lu
- School of Mathematics and Physics, China University of Geosciences (Wuhan), Wuhan 430074, People's Republic of China
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2
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Yang J, Mukherjee S, Lehmann S, Krahl F, Wang X, Potapov P, Lubk A, Ritschel T, Geck J, Nielsch K. Low-Temperature ALD of SbO x /Sb 2 Te 3 Multilayers with Boosted Thermoelectric Performance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306350. [PMID: 37880880 DOI: 10.1002/smll.202306350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/22/2023] [Indexed: 10/27/2023]
Abstract
Nanoscale superlattice (SL) structures have proven to be effective in enhancing the thermoelectric (TE) properties of thin films. Herein, the main phase of antimony telluride (Sb2 Te3 ) thin film with sub-nanometer layers of antimony oxide (SbOx ) is synthesized via atomic layer deposition (ALD) at a low temperature of 80 °C. The SL structure is tailored by varying the cycle numbers of Sb2 Te3 and SbOx . A remarkable power factor of 520.8 µW m-1 K-2 is attained at room temperature when the cycle ratio of SbOx and Sb2 Te3 is set at 1:1000 (i.e., SO:ST = 1:1000), corresponding to the highest electrical conductivity of 339.8 S cm-1 . The results indicate that at the largest thickness, corresponding to ten ALD cycles, the SbOx layers act as a potential barrier that filters out the low-energy charge carriers from contributing to the overall electrical conductivity. In addition to enhancing the scattering of the mid-to-long-wavelength at the SbOx /Sb2 Te3 interface, the presence of the SbOx sub-layer induces the confinement effect and strain forces in the Sb2 Te3 thin film, thereby effectively enhancing the Seebeck coefficient and reducing the thermal conductivity. These findings provide a new perspective on the design of SL-structured TE materials and devices.
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Affiliation(s)
- Jun Yang
- Institute for Metallic Materials, Leibniz Institute for Solid State and Materials Research, 01069, Dresden, Germany
- Institute of Materials Science, Technische Universität Dresden, 01062, Dresden, Germany
| | - Samik Mukherjee
- Institute for Metallic Materials, Leibniz Institute for Solid State and Materials Research, 01069, Dresden, Germany
- Jio Institute, Navi Mumbai, Maharashtra, 410206, India
| | - Sebastian Lehmann
- Institute for Metallic Materials, Leibniz Institute for Solid State and Materials Research, 01069, Dresden, Germany
| | - Fabian Krahl
- Institute for Metallic Materials, Leibniz Institute for Solid State and Materials Research, 01069, Dresden, Germany
| | - Xiaoyu Wang
- Institute for Integrative Nanosciences, Leibniz Institute for Solid State and Materials Research, 01069, Dresden, Germany
- School of Physics and Optoelectronic Engineering, Hainan University, Haikou, 570228, China
| | - Pavel Potapov
- Institute for Solid State Research, Leibniz Institute for Solid State and Materials Research, 01069, Dresden, Germany
| | - Axel Lubk
- Institute for Solid State Research, Leibniz Institute for Solid State and Materials Research, 01069, Dresden, Germany
| | - Tobias Ritschel
- Institute of Solid State and Materials Physics, Technische Universität Dresden, 01069, Dresden, Germany
| | - Jochen Geck
- Institute of Solid State and Materials Physics, Technische Universität Dresden, 01069, Dresden, Germany
| | - Kornelius Nielsch
- Institute for Metallic Materials, Leibniz Institute for Solid State and Materials Research, 01069, Dresden, Germany
- Institute of Materials Science, Technische Universität Dresden, 01062, Dresden, Germany
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3
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Uematsu Y, Ishibe T, Mano T, Ohtake A, Miyazaki HT, Kasaya T, Nakamura Y. Anomalous enhancement of thermoelectric power factor in multiple two-dimensional electron gas system. Nat Commun 2024; 15:322. [PMID: 38228586 DOI: 10.1038/s41467-023-44165-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 12/03/2023] [Indexed: 01/18/2024] Open
Abstract
Toward drastic enhancement of thermoelectric power factor, quantum confinement effect proposed by Hicks and Dresselhaus has intrigued a lot of researchers. There has been much effort to increase power factor using step-like density-of-states in two-dimensional electron gas (2DEG) system. Here, we pay attention to another effect caused by confining electrons spatially along one-dimensional direction: multiplied 2DEG effect, where multiple discrete subbands contribute to electrical conduction, resulting in high Seebeck coefficient. The power factor of multiple 2DEG in GaAs reaches the ultrahigh value of ~100 μWcm-1 K-2 at 300 K. We evaluate the enhancement rate defined as power factor of 2DEG divided by that of three-dimensional bulk. The experimental enhancement rate relative to the theoretical one of conventional 2DEG reaches anomalously high (~4) in multiple 2DEG compared with those in various conventional 2DEG systems (~1). This proposed methodology for power factor enhancement opens the next era of thermoelectric research.
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Affiliation(s)
- Yuto Uematsu
- Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka, 560-8531, Japan
| | - Takafumi Ishibe
- Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka, 560-8531, Japan
| | - Takaaki Mano
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
| | - Akihiro Ohtake
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
| | - Hideki T Miyazaki
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
| | - Takeshi Kasaya
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
| | - Yoshiaki Nakamura
- Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka, 560-8531, Japan.
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Liu Y, Zhi J, Li W, Yang Q, Zhang L, Zhang Y. Oxide Materials for Thermoelectric Conversion. Molecules 2023; 28:5894. [PMID: 37570865 PMCID: PMC10421396 DOI: 10.3390/molecules28155894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 08/01/2023] [Accepted: 08/04/2023] [Indexed: 08/13/2023] Open
Abstract
Thermoelectric technology has emerged as a prominent area of research in the past few decades for harnessing waste heat and improving the efficiency of next-generation renewable energy technologies. There has been rapid progress in the development of high-performance thermoelectric materials, as measured by the dimensionless figure of merit (ZT = S2 · σ · κ-1). Several heavy-metal-based thermoelectric materials with commercial-level performance (ZT = 1) have so far been proposed. However, the extensive application of these materials still faces challenges due to their low thermal/chemical stability, high toxicity, and limited abundance in the Earth's crust. In contrast, oxide-based thermoelectric materials, such as ZnO, SrTiO3, layered cobalt oxides, etc., have attracted growing interest as they can overcome the limitations of their heavy-metal-based counterparts. In this review, we summarize the recent research progress and introduce improvement strategies in oxide-based thermoelectric materials. This will provide an overview of their development history and design schemes, ultimately aiding in enhancing the overall performance of oxide-based thermoelectric materials.
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Affiliation(s)
- Yucen Liu
- Institute of Quantum and Sustainable Technology (IQST), School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China; (Y.L.); (J.Z.); (W.L.)
| | - Jun Zhi
- Institute of Quantum and Sustainable Technology (IQST), School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China; (Y.L.); (J.Z.); (W.L.)
| | - Wannuo Li
- Institute of Quantum and Sustainable Technology (IQST), School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China; (Y.L.); (J.Z.); (W.L.)
| | - Qian Yang
- Institute of Quantum and Sustainable Technology (IQST), School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China; (Y.L.); (J.Z.); (W.L.)
- Foshan (Southern China) Institute for New Materials, Foshan 528200, China
| | - Long Zhang
- Institute of Quantum and Sustainable Technology (IQST), School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China; (Y.L.); (J.Z.); (W.L.)
| | - Yuqiao Zhang
- Institute of Quantum and Sustainable Technology (IQST), School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China; (Y.L.); (J.Z.); (W.L.)
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Chen V, Lee HR, Köroğlu Ç, McClellan CJ, Daus A, Pop E. Ambipolar Thickness-Dependent Thermoelectric Measurements of WSe 2. NANO LETTERS 2023; 23:4095-4100. [PMID: 37141159 DOI: 10.1021/acs.nanolett.2c03468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Thermoelectric materials can harvest electrical energy from temperature gradients, and could play a role as power supplies for sensors and other devices. Here, we characterize fundamental in-plane electrical and thermoelectric properties of layered WSe2 over a range of thicknesses, from 10 to 96 nm, between 300 and 400 K. The devices are electrostatically gated with an ion gel, enabling us to probe both electron and hole regimes over a large range of carrier densities. We extract the highest n- and p-type Seebeck coefficients for thin-film WSe2, -500 and 950 μV/K respectively, reported to date at room temperature. We also emphasize the importance of low substrate thermal conductivity on such lateral thermoelectric measurements, improving this platform for future studies on other nanomaterials.
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Affiliation(s)
- Victoria Chen
- Dept. of Electrical Engineering, Stanford University, Stanford, California 94305, United States
| | - Hye Ryoung Lee
- Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, United States
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Çağıl Köroğlu
- Dept. of Electrical Engineering, Stanford University, Stanford, California 94305, United States
| | - Connor J McClellan
- Dept. of Electrical Engineering, Stanford University, Stanford, California 94305, United States
| | - Alwin Daus
- Dept. of Electrical Engineering, Stanford University, Stanford, California 94305, United States
- Chair of Electronic Devices, RWTH Aachen University, Aachen, 52074, Germany
| | - Eric Pop
- Dept. of Electrical Engineering, Stanford University, Stanford, California 94305, United States
- Dept. of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
- Precourt Institute for Energy, Stanford University, Stanford, California 94305, United States
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6
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Sousa V, Savelli G, Lebedev OI, Kovnir K, Correia JH, Vieira EMF, Alpuim P, Kolen’ko YV. High Seebeck Coefficient from Screen-Printed Colloidal PbSe Nanocrystals Thin Film. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8805. [PMID: 36556609 PMCID: PMC9781735 DOI: 10.3390/ma15248805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/02/2022] [Accepted: 12/04/2022] [Indexed: 06/17/2023]
Abstract
Thin-film thermoelectrics (TEs) with a thickness of a few microns present an attractive opportunity to power the internet of things (IoT). Here, we propose screen printing as an industry-relevant technology to fabricate TE thin films from colloidal PbSe quantum dots (QDs). Monodisperse 13 nm-sized PbSe QDs with spherical morphology were synthesized through a straightforward heating-up method. The cubic-phase PbSe QDs with homogeneous chemical composition allowed the formulation of a novel ink to fabricate 2 μm-thick thin films through robust screen printing followed by rapid annealing. A maximum Seebeck coefficient of 561 μV K-1 was obtained at 143 °C and the highest electrical conductivity of 123 S m-1 was reached at 197 °C. Power factor calculations resulted in a maximum value of 2.47 × 10-5 W m-1 K-2 at 143 °C. To the best of our knowledge, the observed Seebeck coefficient value is the highest reported for TE thin films fabricated by screen printing. Thus, this study highlights that increased Seebeck coefficients can be obtained by using QD building blocks owing to quantum confinement.
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Affiliation(s)
- Viviana Sousa
- Center of Physics of the Universities of Minho and Porto, University of Minho, 4710-057 Braga, Portugal
- International Iberian Nanotechnology Laboratory, 4715-330 Braga, Portugal
| | - Guillaume Savelli
- University Grenoble Alpes, CEA-Liten, 17 av. Des Martyrs, 38000 Grenoble, France
| | - Oleg I. Lebedev
- Laboratoire CRISMAT, UMR 6508, CNRS-ENSICAEN, 14050 Caen, France
| | - Kirill Kovnir
- Department of Chemistry, Iowa State University, Ames, IA 50011, USA
- Ames National Laboratory, U.S. Department of Energy, Ames, IA 50011, USA
| | - José H. Correia
- CMEMS-UMinho, University of Minho, 4800-058 Guimarães, Portugal
- LABBELS–Associate Laboratory, 4710-057 Braga, Portugal
| | - Eliana M. F. Vieira
- CMEMS-UMinho, University of Minho, 4800-058 Guimarães, Portugal
- LABBELS–Associate Laboratory, 4710-057 Braga, Portugal
| | - Pedro Alpuim
- Center of Physics of the Universities of Minho and Porto, University of Minho, 4710-057 Braga, Portugal
- International Iberian Nanotechnology Laboratory, 4715-330 Braga, Portugal
| | - Yury V. Kolen’ko
- International Iberian Nanotechnology Laboratory, 4715-330 Braga, Portugal
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7
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Bark H, Kim S, Lee W, Lee PS, Lee H. Continuous Tuning of the Fermi Level in Disorder-Engineered Amorphous Films of Li-Doped ZnO for Thermoelectric Applications. ACS APPLIED MATERIALS & INTERFACES 2021; 13:55029-55039. [PMID: 34756007 DOI: 10.1021/acsami.1c16162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Amorphous metal-oxide semiconductors can be readily prepared by a solution process at low temperatures, and their energy band structures and carrier concentrations can be controlled based on the oxide composition or the addition of dopants in the design of thermoelectric (TE) materials. However, research on the correlation between the charge transport and TE performance of amorphous metal-oxide semiconductors is still in its infancy. Herein, we present the energy-dependent TE performance characteristics of Li-doped ZnO thin films with different doping levels and charge carrier concentrations. Thin films were prepared by the solution process, and the Li doping level was controlled by the Li precursor concentration added to a Zn precursor solution. Subsequently, a field-effect-modulated Seebeck coefficient measurement device was built to study the energy-dependent TE performance. Notably, the higher ratio of interstitial Li (Liinter) and oxygen vacancies (Ova) in the Li-ZnO device indicates an improved n-type TE performance. To investigate more thoroughly the charge transport phenomena, the localized density of states (DOS) was derived from the temperature-dependent transfer curve; the higher ratio of interstitial Li (Liinter) and oxygen vacancy (Ova) induces a reduction in the localized DOS and lowers the degree of disorder in their DOS. The determined energy-dependent TE characteristics can be used as guidance for the design of efficient TE devices with amorphous metal-oxide semiconductors.
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Affiliation(s)
- Hyunwoo Bark
- School of Material Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
- School of Material Science and Engineering, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, 02707 Seoul, Republic of Korea
| | - Soohyun Kim
- School of Material Science and Engineering, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, 02707 Seoul, Republic of Korea
| | - Wonmok Lee
- Department of Chemistry, Sejong University, 209 Neungdong-ro, Gwangjin-gu, 05006 Seoul, Republic of Korea
| | - Pooi See Lee
- School of Material Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
| | - Hyunjung Lee
- School of Material Science and Engineering, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, 02707 Seoul, Republic of Korea
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8
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Kostylev I, Zadorozhko AA, Hatifi M, Konstantinov D. Thermoelectric Transport in a Correlated Electron System on the Surface of Liquid Helium. PHYSICAL REVIEW LETTERS 2021; 127:186801. [PMID: 34767421 DOI: 10.1103/physrevlett.127.186801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 09/21/2021] [Indexed: 06/13/2023]
Abstract
We report on the direct observation of the thermoelectric transport in a nondegenerate electron system trapped on the surface of liquid helium. The microwave-induced excitation of the vertical transitions of electrons between the surface-bound states results in their lateral flow, which we were able to detect by employing a segmented electrode configuration. We show that this flow of electrons arises due to the Seebeck effect. Our experimental results are in good agreement with the theoretical calculations based on kinetic equations. This demonstrates the importance of the fast electron-electron collisions, which, in particular, leads to the violation of the Wiedemann-Franz law in this system.
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Affiliation(s)
- Ivan Kostylev
- Quantum Dynamics Unit, Okinawa Institute of Science and Technology, Tancha 1919-1, Okinawa 904-0495, Japan
| | - A A Zadorozhko
- Quantum Dynamics Unit, Okinawa Institute of Science and Technology, Tancha 1919-1, Okinawa 904-0495, Japan
| | - M Hatifi
- Quantum Dynamics Unit, Okinawa Institute of Science and Technology, Tancha 1919-1, Okinawa 904-0495, Japan
| | - Denis Konstantinov
- Quantum Dynamics Unit, Okinawa Institute of Science and Technology, Tancha 1919-1, Okinawa 904-0495, Japan
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Yang X, Han J, Yu J, Chen Y, Zhang H, Ding M, Jia C, Sun J, Sun Q, Wang ZL. Versatile Triboiontronic Transistor via Proton Conductor. ACS NANO 2020; 14:8668-8677. [PMID: 32568513 DOI: 10.1021/acsnano.0c03030] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Iontronics are effective in modulating electrical properties through the electric double layers (EDLs) assisted with ionic migration/arrangement, which are highly promising for unconventional electronics, ionic sensory devices, and flexible interactive interface. Proton conductors with the smallest and most abundant protons (H+) can realize a faster migration/polarization under electric field to form the EDL with higher capacitance. Here, a versatile triboiontronic MoS2 transistor via proton conductor by sophisticated combination of triboelectric modulation and protons migration has been demonstrated. This device utilizes triboelectric potential originated from mechanical displacement to modulate the electrical properties of transistors via protons migration/accumulation. It shows superior electrical properties, including high current on/off ratio over 106, low cutoff current (∼0.04 pA), and steep switching properties (89 μm/dec). Pioneering noise tests are conducted to the tribotronic devices to exclude the possible noise interference introduced by mechanical displacement. The versatile triboiontronic MoS2 transistor via proton conductor has been utilized for mechanical behavior derived logic devices and an artificial sensory neuron system. This work represents the reliable and effective triboelectric potential modulation on electronic transportation through protonic dielectrics, which is highly desired for theoretical study of tribotronic gating, active mechanosensation, self-powered electronic skin, artificial intelligence, etc.
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Affiliation(s)
- Xixi Yang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST), Beijing 100190, P. R. China
| | - Jing Han
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jinran Yu
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Youhui Chen
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huai Zhang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mei Ding
- College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China
| | - Chuankun Jia
- College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China
| | - Jia Sun
- School of Physics and Electronics, Central South University, Changsha 410083, China
| | - Qijun Sun
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
| | - Zhong Lin Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
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10
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Park NW, Kang DY, Lee WY, Yoon YS, Kim GS, Saitoh E, Kim TG, Lee SK. Controllable Seebeck Coefficients of a Metal-Diffused Aluminum Oxide Layer via Conducting Filament Density and Energy Filtering. ACS APPLIED MATERIALS & INTERFACES 2019; 11:23303-23312. [PMID: 31184861 DOI: 10.1021/acsami.9b01289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We investigate the intrinsic thermoelectric (TE) properties of the metal-diffused aluminum oxide (AO) layer in metal/AO/metal structures, where the metallic conducting filaments (CFs) were locally formed in the structures via an electrical breakdown (EBD) process as shown by resistive switching memory devices, by directly measuring cross-plane Seebeck coefficients on the CF-containing insulating AO layers. The results showed that the Seebeck coefficients of the CF-containing AO layer in metal/AO/metal structures were influenced by the generation of the metallic CFs, which is due to the diffusion of the metal into the insulating AO layers when exposed to a temperature gradient in the direction of the cross plane of the sample. In addition, the increase in the Seebeck coefficients of the CF-containing AO layer when the number of EBD-processed patterns was increased is satisfactorily explained by the low-energy carrier (i.e., minority carriers) filtering through the metal-oxide interfacial barriers in the metal/AO/metal structures.
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Affiliation(s)
- No-Won Park
- Department of Physics , Chung-Ang University , Seoul 06974 , Republic of Korea
| | - Dae Yun Kang
- School of Electrical Engineering , Korea University , Seoul 02841 , Republic of Korea
| | - Won-Yong Lee
- Department of Physics , Chung-Ang University , Seoul 06974 , Republic of Korea
| | - Yo-Seop Yoon
- Department of Physics , Chung-Ang University , Seoul 06974 , Republic of Korea
| | - Gil-Sung Kim
- Department of Physics , Chung-Ang University , Seoul 06974 , Republic of Korea
| | - Eiji Saitoh
- Institute for Materials Research , Tohoku University , Sendai 980-8577 , Japan
- WPI Advanced Institute for Materials Research , Tohoku University , Sendai 980-8577 , Japan
- Department of Applied Physics , The University of Tokyo , Tokyo 113-8656 , Japan
| | - Tae Geun Kim
- School of Electrical Engineering , Korea University , Seoul 02841 , Republic of Korea
| | - Sang-Kwon Lee
- Department of Physics , Chung-Ang University , Seoul 06974 , Republic of Korea
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11
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Yalamarthy AS, Muñoz Rojo M, Bruefach A, Boone D, Dowling KM, Satterthwaite PF, Goldhaber-Gordon D, Pop E, Senesky DG. Significant Phonon Drag Enables High Power Factor in the AlGaN/GaN Two-Dimensional Electron Gas. NANO LETTERS 2019; 19:3770-3776. [PMID: 31088057 DOI: 10.1021/acs.nanolett.9b00901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In typical thermoelectric energy harvesters and sensors, the Seebeck effect is caused by diffusion of electrons or holes in a temperature gradient. However, the Seebeck effect can also have a phonon drag component, due to momentum exchange between charge carriers and lattice phonons, which is more difficult to quantify. Here, we present the first study of phonon drag in the AlGaN/GaN two-dimensional electron gas (2DEG). We find that phonon drag does not contribute significantly to the thermoelectric behavior of devices with ∼100 nm GaN thickness, which suppresses the phonon mean free path. However, when the thickness is increased to ∼1.2 μm, up to 32% (88%) of the Seebeck coefficient at 300 K (50 K) can be attributed to the drag component. In turn, the phonon drag enables state-of-the-art thermoelectric power factor in the thicker GaN film, up to ∼40 mW m-1 K-2 at 50 K. By measuring the thermal conductivity of these AlGaN/GaN films, we show that the magnitude of the phonon drag can increase even when the thermal conductivity decreases. Decoupling of thermal conductivity and Seebeck coefficient could enable important advancements in thermoelectric power conversion with devices based on 2DEGs.
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Affiliation(s)
| | - Miguel Muñoz Rojo
- Department of Thermal and Fluid Engineering , University of Twente , Enschede 7500 AE , Netherlands
| | - Alexandra Bruefach
- Department of Materials Science and Engineering , University of California Berkeley , Berkeley , California 94720 , United States
| | - Derrick Boone
- Stanford Institute for Materials and Energy Sciences , SLAC National Accelerator Laboratory , Menlo Park , California 94025 , United States
| | | | | | - David Goldhaber-Gordon
- Stanford Institute for Materials and Energy Sciences , SLAC National Accelerator Laboratory , Menlo Park , California 94025 , United States
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Giant thermoelectric power factor in ultrathin FeSe superconductor. Nat Commun 2019; 10:825. [PMID: 30778077 PMCID: PMC6379375 DOI: 10.1038/s41467-019-08784-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Accepted: 01/25/2019] [Indexed: 11/17/2022] Open
Abstract
The thermoelectric effect is attracting a renewed interest as a concept for energy harvesting technologies. Nanomaterials have been considered a key to realize efficient thermoelectric conversions owing to the low dimensional charge and phonon transports. In this regard, recently emerging two-dimensional materials could be promising candidates with novel thermoelectric functionalities. Here we report that FeSe ultrathin films, a high-Tc superconductor (Tc; superconducting transition temperature), exhibit superior thermoelectric responses. With decreasing thickness d, the electrical conductivity increases accompanying the emergence of high-Tc superconductivity; unexpectedly, the Seebeck coefficient α shows a concomitant increase as a result of the appearance of two-dimensional natures. When d is reduced down to ~1 nm, the thermoelectric power factor at 50 K and room temperature reach unprecedented values as high as 13,000 and 260 μW cm−1 K−2, respectively. The large thermoelectric effect in high Tc superconductors indicates the high potential of two-dimensional layered materials towards multi-functionalization. In an effort to optimize the performance of two-dimensional materials for thermoelectric generation, compounds with advantageous intrinsic properties must be identified. Here, the authors report large thermoelectric effect in ultrathin FeSe thin films with high Tc superconductivity.
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13
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Park NW, Lee WY, Yoon YS, Ahn JY, Lee JH, Kim GS, Kim TG, Choi CJ, Park JS, Saitoh E, Lee SK. Direct Probing of Cross-Plane Thermal Properties of Atomic Layer Deposition Al 2O 3/ZnO Superlattice Films with an Improved Figure of Merit and Their Cross-Plane Thermoelectric Generating Performance. ACS APPLIED MATERIALS & INTERFACES 2018; 10:44472-44482. [PMID: 30507128 DOI: 10.1021/acsami.8b15997] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
There is a recent interest in semiconducting superlattice films because their low dimensionality can increase the thermal power and phonon scattering at the interface in superlattice films. However, experimental studies in all cross-plane thermoelectric (TE) properties, including thermal conductivity, Seebeck coefficient, and electrical conductivity, have not been performed from these semiconducting superlattice films because of substantial difficulties in the direct measurement of the Seebeck coefficient and electrical conductivity. Unlike the conventional measurement method, we present a technique using a structure of sandwiched superlattice films between two embedded heaters as the heating source, and electrodes with two Cu plates, which directly enables the investigation of the Seebeck coefficient and electrical conductivity across the Al2O3/ZnO superlattice films, prepared by the atomic layer deposition method. Used in combination with the promising cross-plane four-point probe 3-ω method, our measurements and analysis demonstrate all cross-plane TE properties of Al2O3/ZnO superlattice films in the temperature range of 80 to 500 K. Our experimental methodology and the obtained results represent a significant advancement in the understanding of phonons and electrical transports in nanostructured materials, especially in semiconducting superlattice films in various temperature ranges.
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Affiliation(s)
- No-Won Park
- Department of Physics , Chung-Ang University , Seoul 06974 , Republic of Korea
| | - Won-Yong Lee
- Department of Physics , Chung-Ang University , Seoul 06974 , Republic of Korea
| | - Yo-Seop Yoon
- Department of Physics , Chung-Ang University , Seoul 06974 , Republic of Korea
| | - Jay-Young Ahn
- Department of Physics , Chung-Ang University , Seoul 06974 , Republic of Korea
| | - Jung-Hoon Lee
- Division of Materials Science and Engineering , Hanyang University , Seoul 04763 , Republic of Korea
| | - Gil-Sung Kim
- Department of Physics , Chung-Ang University , Seoul 06974 , Republic of Korea
| | - Tae Geun Kim
- School of Electrical Engineering , Korea University , Seoul 02841 , Republic of Korea
| | - Chel-Jong Choi
- Department of Semiconductor Science and Technology , Chonbuk National University , Jeonju 54896 , Republic of Korea
| | - Jin-Seong Park
- Division of Materials Science and Engineering , Hanyang University , Seoul 04763 , Republic of Korea
| | | | - Sang-Kwon Lee
- Department of Physics , Chung-Ang University , Seoul 06974 , Republic of Korea
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14
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Bisri SZ, Shimizu S, Nakano M, Iwasa Y. Endeavor of Iontronics: From Fundamentals to Applications of Ion-Controlled Electronics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1607054. [PMID: 28582588 DOI: 10.1002/adma.201607054] [Citation(s) in RCA: 185] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2016] [Revised: 02/16/2017] [Indexed: 05/28/2023]
Abstract
Iontronics is a newly emerging interdisciplinary concept which bridges electronics and ionics, covering electrochemistry, solid-state physics, electronic engineering, and biological sciences. The recent developments of electronic devices are highlighted, based on electric double layers formed at the interface between ionic conductors (but electronically insulators) and various electronic conductors including organics and inorganics (oxides, chalcogenide, and carbon-based materials). Particular attention is devoted to electric-double-layer transistors (EDLTs), which are producing a significant impact, particularly in electrical control of phase transitions, including superconductivity, which has been difficult or impossible in conventional all-solid-state electronic devices. Besides that, the current state of the art and the future challenges of iontronics are also reviewed for many applications, including flexible electronics, healthcare-related devices, and energy harvesting.
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Affiliation(s)
- Satria Zulkarnaen Bisri
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan
| | - Sunao Shimizu
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan
| | - Masaki Nakano
- Quantum Phase Electronic Center (QPEC) and Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Yoshihiro Iwasa
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan
- Quantum Phase Electronic Center (QPEC) and Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
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15
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Shimizu S, Iwasa Y. ELECTROCHEMISTRY 2017; 85:94-99. [DOI: 10.5796/electrochemistry.85.94] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] Open
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16
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Saito Y, Iizuka T, Koretsune T, Arita R, Shimizu S, Iwasa Y. Gate-Tuned Thermoelectric Power in Black Phosphorus. NANO LETTERS 2016; 16:4819-24. [PMID: 27462825 DOI: 10.1021/acs.nanolett.6b00999] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The electric field effect is a useful means of elucidating intrinsic material properties as well as for designing functional devices. The electric-double-layer transistor (EDLT) enables the control of carrier density in a wide range, which is recently proved to be an effective tool for the investigation of thermoelectric properties. Here, we report the gate-tuning of thermoelectric power in a black phosphorus (BP) single crystal flake with the thickness of 40 nm. Using an EDLT configuration, we successfully control the thermoelectric power (S) and find that the S of ion-gated BP reached +510 μV/K at 210 K in the hole depleted state, which is much higher than the reported bulk single crystal value of +340 μV/K at 300 K. We compared this experimental data with the first-principles-based calculation and found that this enhancement is qualitatively explained by the effective thinning of the conduction channel of the BP flake and nonuniformity of the channel owing to the gate operation in a depletion mode. Our results provide new opportunities for further engineering BP as a thermoelectric material in nanoscale.
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Affiliation(s)
- Yu Saito
- Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo , Tokyo 113-8656, Japan
| | - Takahiko Iizuka
- Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo , Tokyo 113-8656, Japan
| | - Takashi Koretsune
- RIKEN Center for Emergent Matter Science (CEMS) , Wako 351-0198, Japan
| | - Ryotaro Arita
- RIKEN Center for Emergent Matter Science (CEMS) , Wako 351-0198, Japan
| | - Sunao Shimizu
- RIKEN Center for Emergent Matter Science (CEMS) , Wako 351-0198, Japan
| | - Yoshihiro Iwasa
- Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo , Tokyo 113-8656, Japan
- RIKEN Center for Emergent Matter Science (CEMS) , Wako 351-0198, Japan
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