1
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Milligan GM, Cordova DLM, Yao ZF, Zhi BY, Scammell LR, Aoki T, Arguilla M. Encapsulation of crystalline and amorphous Sb 2S 3 within carbon and boron nitride nanotubes. Chem Sci 2024; 15:10464-10476. [PMID: 38994401 PMCID: PMC11234864 DOI: 10.1039/d4sc01477d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Accepted: 06/02/2024] [Indexed: 07/13/2024] Open
Abstract
The recent rediscovery of 1D and quasi-1D (q-1D) van der Waals (vdW) crystals has laid foundation for the realization of emergent electronic, optical, and quantum-confined physical phenomena in both bulk and at the nanoscale. Of these, the highly anisotropic q-1D vdW crystal structure and the visible-light optical/optoelectronic properties of antimony trisulfide (Sb2S3) have led to its widespread consideration as a promising building block for photovoltaic and non-volatile phase change devices. However, while these applications will greatly benefit from well-defined and sub-nanometer-thick q-1D structures, little has been known about feasible synthetic routes that can access single covalent chains of Sb2S3. In this work, we explore how encapsulation in single or multi-walled carbon nanotubes (SWCNTs or MWCNTs) and visible-range transparent boron nitride nanotubes (BNNTs) influences the growth and phase of Sb2S3 nanostructures. We demonstrate that nanotubes with smaller diameters had a more pronounced effect in the crystallographic growth direction and orientation of Sb2S3 nanostructures, promoting the crystallization of the guest structures along the long-axis [010]-direction. As such, we were able to reliably access well-ordered few to single covalent chains of Sb2S3 when synthesized within defect-free SWCNTs with sub-2 nm inner diameters. Intriguingly, we found that the degree of crystalline order of Sb2S3 nanostructures was strongly influenced by the presence of defects and discontinuities along the Sb2S3-nanotube interface. We show that amorphous nanowire domains of Sb2S3 form around defect sites in larger, multi-walled nanotubes that manifest inner wall defects and discontinuities, suggesting a means to manipulate the crystallization dynamics of confined sub-10 nm-thick Sb2S3 nanostructures within nanotubes. Lastly, we show that ultranarrow amorphous Sb2S3 can impart functionality onto isolable BNNTs with photocurrent generation in the pA range which, alongside the dispersibility of the Sb2S3@BNNTs, could be leveraged to easily fabricate photoresistors only a few nm in width. Altogether, our results serve to solidify the understanding of how q-1D vdW pnictogen chalcogenides crystallize within confined synthetic platforms and are a step towards realizing functional materials from ensembles of encapsulated heterostructures.
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Affiliation(s)
- Griffin M Milligan
- Department of Chemistry, University of California Irvine Irvine California 92697 USA
| | | | - Ze-Fan Yao
- Department of Chemical and Biomolecular Engineering, University of California Irvine Irvine California 92697 USA
| | - Brian Y Zhi
- Department of Chemistry, University of California Irvine Irvine California 92697 USA
| | | | - Toshihiro Aoki
- Irvine Materials Research Institute, University of California Irvine Irvine California 92697 USA
| | - Maxx Arguilla
- Department of Chemistry, University of California Irvine Irvine California 92697 USA
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2
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Li Y, Li R, Jia Z, Yu B, Yang Y, Bai S, Pollard M, Liu Y, Ma Y, Kampwerth H, Lin Q. Precursor Engineering of Solution-Processed Sb 2 S 3 Solar Cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308895. [PMID: 37875777 DOI: 10.1002/smll.202308895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Indexed: 10/26/2023]
Abstract
Antimony-based chalcogenides have emerged as promising candidates for next-generation thin film photovoltaics. Particularly, binary Sb2 S3 thin films have exhibited great potential for optoelectronic applications, due to the facile and low-cost fabrication, simple composition, decent charge transport and superior stability. However, most of the reported efficient Sb2 S3 solar cells are realized based on chemical bath deposition and hydrothermal methods, which require large amount of solution and are normally very time-consuming. In this work, Ag ions are introduced within the Sb2 S3 sol-gel precursors, and effectively modulated the crystallization and charge transport properties of Sb2 S3 . The crystallinity of the Sb2 S3 crystal grains are enhanced and the charge carrier mobility is increased, which resulted improved charge collection efficiency and reduced charge recombination losses, reflected by the greatly improved fill factor and open-circuit voltage of the Ag incorporated Sb2 S3 solar cells. The champion devices reached a record high power conversion efficiency of 7.73% (with antireflection coating), which is comparable with the best photovoltaic performance of Sb2 S3 solar cells achieved based on chemical bath deposition and hydrothermal techniques, and pave the great avenue for next-generation solution-processed photovoltaics.
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Affiliation(s)
- Yanyan Li
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Hubei Luojia Laboratory, Wuhan University, Wuhan, Hubei, 430072, China
| | - Ruiming Li
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Hubei Luojia Laboratory, Wuhan University, Wuhan, Hubei, 430072, China
| | - Zhenglin Jia
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Hubei Luojia Laboratory, Wuhan University, Wuhan, Hubei, 430072, China
| | - Bin Yu
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Hubei Luojia Laboratory, Wuhan University, Wuhan, Hubei, 430072, China
| | - Yujie Yang
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Hubei Luojia Laboratory, Wuhan University, Wuhan, Hubei, 430072, China
| | - Songxue Bai
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Hubei Luojia Laboratory, Wuhan University, Wuhan, Hubei, 430072, China
| | - Michael Pollard
- School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, New South Wales, NSW 205, Australia
| | - Yong Liu
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Hubei Luojia Laboratory, Wuhan University, Wuhan, Hubei, 430072, China
| | - Ye Ma
- Core Facility of Wuhan University, Wuhan University, Wuhan, Hubei, 430072, China
| | - Henner Kampwerth
- School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, New South Wales, NSW 205, Australia
| | - Qianqian Lin
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Hubei Luojia Laboratory, Wuhan University, Wuhan, Hubei, 430072, China
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3
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Zhou Z, Dong Z, Xie H, Jiang W, Wang Y, Xu B, Xiong H, Yang B. A novel vacuum distillation method for preparing high purity antimony trisulfide from antimony minerals. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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4
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Thomas A, Karmakar G, Shah AY, Lokhande SV, Kulkarni AY, Tyagi A, Singh Chauhan R, Kumar NN, Singh AP. Molecular precursor-mediated facile synthesis of photo-responsive stibnite Sb 2S 3 nanorods and tetrahedrite Cu 12Sb 4S 13 nanocrystals. Dalton Trans 2022; 51:12181-12191. [PMID: 35876784 DOI: 10.1039/d2dt01814d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Stibnite Sb2S3 and tetrahedrite Cu12Sb4S13 nanostructures being economical, environmentally benign and having a high absorption coefficient are highly promising materials for energy conversion applications. However, producing these materials especially tetrahedrite in the phase pure form is a challenging task. In this report we present a structurally characterized single source molecular precursor [Sb(4,6-Me2pymS)3] for the facile synthesis of binary Sb2S3 as well as ternary Cu12Sb4S13 in oleylamine (OAm) at a relatively lower temperature. The as-prepared Sb2S3 and Cu12Sb4S13 nanostructures were thoroughly checked for their phase purity, elemental composition and morphology by powder X-ray diffraction (pXRD), electron dispersive spectroscopy (EDS) and electron microscopy techniques. pXRD and EDS studies confirm the formation of phase pure, crystalline orthorhombic Sb2S3 and cubic Cu12Sb4S13. The SEM, TEM and HRTEM images depict the formation of well-defined nanorods and nearly spherical nanocrystals for Sb2S3 and Cu12Sb4S13, respectively. The Sb2S3 nanorods and Cu12Sb4S13 nanocrystals exhibit an optical bandgap of ∼1.88 and 2.07 eV, respectively, which are slightly blue-shifted relative to their bulk bandgap, indicating the quantum confinement effect. Finally, efficient photoresponsivity and good photo-stability were achieved in the as-prepared Sb2S3 and Cu12Sb4S13 nanostructure-based prototype photo-electrochemical cell, which make them promising candidates for alternative low-cost photon absorber materials.
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Affiliation(s)
- Agnes Thomas
- Department of Chemistry, K. J. Somaiya College of Science and Commerce, Vidyavihar, Mumbai 400077, India.
| | - Gourab Karmakar
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, Homi Bhabha National Institute, Mumbai 400094, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Alpa Y Shah
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, Homi Bhabha National Institute, Mumbai 400094, India.
| | - Saili Vikram Lokhande
- Department of Chemistry, K. J. Somaiya College of Science and Commerce, Vidyavihar, Mumbai 400077, India.
| | - Atharva Yeshwant Kulkarni
- Department of Chemistry, K. J. Somaiya College of Science and Commerce, Vidyavihar, Mumbai 400077, India.
| | - Adish Tyagi
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, Homi Bhabha National Institute, Mumbai 400094, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Rohit Singh Chauhan
- Department of Chemistry, K. J. Somaiya College of Science and Commerce, Vidyavihar, Mumbai 400077, India.
| | - N Naveen Kumar
- Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Avadhesh Pratap Singh
- Department of Chemistry, Kamla Nehru Institute of Physical and Social Sciences, Sultanpur-228118, India
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Xiang Y, Guo H, Cai Z, Jiang C, Zhu C, Wu Y, Zhu WH, Chen T. Dopant-free hole-transporting materials for stable Sb 2(S,Se) 3 solar cells. Chem Commun (Camb) 2022; 58:4787-4790. [PMID: 35343982 DOI: 10.1039/d1cc07041j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Herein, we demonstrate that a thiophene-modified quinoxaline core small molecule can be applied in Sb2(S,Se)3 solar cells. We reveal that the interaction between thiophene and Sb2(S,Se)3 through the Sb-S bond essentially improves the interfacial hole-extraction ability. This study provides a cost-effective dopant-free hole-transporting material for inorganic thin film solar cell applications with excellent stability.
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Affiliation(s)
- Yinan Xiang
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, No. 96 Jinzhai Road, Hefei, Anhui Province, 230026, P. R. China.
| | - Huanxin Guo
- Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, P. R. China.
| | - Zhiyuan Cai
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, No. 96 Jinzhai Road, Hefei, Anhui Province, 230026, P. R. China.
| | - Chenhui Jiang
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, No. 96 Jinzhai Road, Hefei, Anhui Province, 230026, P. R. China.
| | - Changfei Zhu
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, No. 96 Jinzhai Road, Hefei, Anhui Province, 230026, P. R. China.
| | - Yongzhen Wu
- Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, P. R. China.
| | - Wei-Hong Zhu
- Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, P. R. China.
| | - Tao Chen
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, No. 96 Jinzhai Road, Hefei, Anhui Province, 230026, P. R. China.
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6
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Hector G, Eensalu JS, Katerski A, Roussel H, Chaix-Pluchery O, Appert E, Donatini F, Acik IO, Kärber E, Consonni V. Optimization of the Sb 2S 3 Shell Thickness in ZnO Nanowire-Based Extremely Thin Absorber Solar Cells. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:198. [PMID: 35055217 PMCID: PMC8777826 DOI: 10.3390/nano12020198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 12/22/2021] [Accepted: 12/28/2021] [Indexed: 12/04/2022]
Abstract
Extremely thin absorber (ETA) solar cells made of ZnO/TiO2/Sb2S3 core-shell nanowire heterostructures, using P3HT as the hole-transporting material (HTM), are of high interest to surpass solar cell efficiencies of their planar counterpart at lower material cost. However, no dimensional optimization has been addressed in detail, as it raises material and technological critical issues. In this study, the thickness of the Sb2S3 shell grown by chemical spray pyrolysis is tuned from a couple of nanometers to several tens of nanometers, while switching from a partially to a fully crystallized shell. The Sb2S3 shell is highly pure, and the unwanted Sb2O3 phase was not formed. The low end of the thickness is limited by challenges in the crystallization of the Sb2S3 shell, as it is amorphous at nanoscale dimensions, resulting in the low optical absorption of visible photons. In contrast, the high end of the thickness is limited by the increased density of defects in the bulk of the Sb2S3 shell, degrading charge carrier dynamics, and by the incomplete immersion of the P3HT in the structure, resulting in the poor hole collection. The best ETA solar cell with a short-circuit current density of 12.1 mA/cm2, an open-circuit voltage of 502 mV, and a photovoltaic conversion efficiency of 2.83% is obtained for an intermediate thickness of the Sb2S3 shell. These findings highlight that the incorporation of both the absorber shell and HTM in the core-shell heterostructures relies on the spacing between individual nanowires. They further elaborate the intricate nature of the dimensional optimization of an ETA cell, as it requires a fine-balanced holistic approach to correlate all the dimensions of all the components in the heterostructures.
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Affiliation(s)
- Guislain Hector
- Université Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France; (G.H.); (H.R.); (O.C.-P.); (E.A.)
| | - Jako S. Eensalu
- Laboratory of Thin Film Chemical Technologies, Department of Materials and Environmental Technology, School of Engineering, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia; (J.S.E.); (A.K.); (I.O.A.)
| | - Atanas Katerski
- Laboratory of Thin Film Chemical Technologies, Department of Materials and Environmental Technology, School of Engineering, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia; (J.S.E.); (A.K.); (I.O.A.)
| | - Hervé Roussel
- Université Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France; (G.H.); (H.R.); (O.C.-P.); (E.A.)
| | - Odette Chaix-Pluchery
- Université Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France; (G.H.); (H.R.); (O.C.-P.); (E.A.)
| | - Estelle Appert
- Université Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France; (G.H.); (H.R.); (O.C.-P.); (E.A.)
| | - Fabrice Donatini
- Université Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL, F-38000 Grenoble, France;
| | - Ilona Oja Acik
- Laboratory of Thin Film Chemical Technologies, Department of Materials and Environmental Technology, School of Engineering, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia; (J.S.E.); (A.K.); (I.O.A.)
| | - Erki Kärber
- Laboratory of Thin Film Chemical Technologies, Department of Materials and Environmental Technology, School of Engineering, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia; (J.S.E.); (A.K.); (I.O.A.)
| | - Vincent Consonni
- Université Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France; (G.H.); (H.R.); (O.C.-P.); (E.A.)
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7
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Phase transition mechanism and bandgap engineering of Sb 2S 3 at gigapascal pressures. Commun Chem 2021; 4:125. [PMID: 36697645 PMCID: PMC9814834 DOI: 10.1038/s42004-021-00565-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 08/17/2021] [Indexed: 01/28/2023] Open
Abstract
Earth-abundant antimony trisulfide (Sb2S3), or simply antimonite, is a promising material for capturing natural energies like solar power and heat flux. The layered structure, held up by weak van-der Waals forces, induces anisotropic behaviors in carrier transportation and thermal expansion. Here, we used stress as mechanical stimuli to destabilize the layered structure and observed the structural phase transition to a three-dimensional (3D) structure. We combined in situ x-ray diffraction (XRD), Raman spectroscopy, ultraviolet-visible spectroscopy, and first-principles calculations to study the evolution of structure and bandgap width up to 20.1 GPa. The optical band gap energy of Sb2S3 followed a two-step hierarchical sequence at approximately 4 and 11 GPa. We also revealed that the first step of change is mainly caused by the redistribution of band states near the conduction band maximum. The second transition is controlled by an isostructural phase transition, with collapsed layers and the formation of a higher coordinated bulky structure. The band gap reduced from 1.73 eV at ambient to 0.68 eV at 15 GPa, making it a promising thermoelectric material under high pressure.
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8
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Ying C, Guo F, Cui X, Sun X, Shi C. Influence of
N
‐Butyldithiocarbamic Acid Content on the Properties of Sb
2
S
3
Sensitized TiO
2
Nanorod Arrays and Photovoltaic Performance of the Corresponding Solar Cells. ChemistrySelect 2021. [DOI: 10.1002/slct.202100840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chao Ying
- School of Chemistry and Chemical Engineering Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering Hefei University of Technology Hefei 230009 P. R. China
| | - Fuling Guo
- School of Chemistry and Chemical Engineering Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering Hefei University of Technology Hefei 230009 P. R. China
| | - Xi Cui
- School of Chemistry and Chemical Engineering Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering Hefei University of Technology Hefei 230009 P. R. China
| | - Xun Sun
- School of Chemistry and Chemical Engineering Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering Hefei University of Technology Hefei 230009 P. R. China
| | - Chengwu Shi
- School of Chemistry and Chemical Engineering Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering Hefei University of Technology Hefei 230009 P. R. China
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Yang Y, Shi C, Lv K, Wang Q, Sun X, Chen W. Combination of full-coverage Sb 2S 3 thin films and spiro-OMeTAD:P3HT hybrid hole transporting materials for efficient solar cells. NEW J CHEM 2021. [DOI: 10.1039/d1nj01095f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The Sb2S3 solar cell with a full-coverage Sb2S3 thin film and high-hole-mobility spiro-OMeTAD:P3HT hybrid hole transporting material achieved a PCE of 5.65%.
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Affiliation(s)
- Yang Yang
- School of Chemistry and Chemical Engineering
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering
- Hefei University of Technology
- Hefei 230009
- P. R. China
| | - Chengwu Shi
- School of Chemistry and Chemical Engineering
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering
- Hefei University of Technology
- Hefei 230009
- P. R. China
| | - Kai Lv
- School of Chemistry and Chemical Engineering
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering
- Hefei University of Technology
- Hefei 230009
- P. R. China
| | - Qi Wang
- School of Chemistry and Chemical Engineering
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering
- Hefei University of Technology
- Hefei 230009
- P. R. China
| | - Xun Sun
- School of Chemistry and Chemical Engineering
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering
- Hefei University of Technology
- Hefei 230009
- P. R. China
| | - Wangchao Chen
- School of Chemistry and Chemical Engineering
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering
- Hefei University of Technology
- Hefei 230009
- P. R. China
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10
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Yang H, Boulet P, Record MC. Thermoelectric Properties of Sb-S System Compounds from DFT Calculations. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E4707. [PMID: 33105648 PMCID: PMC7684470 DOI: 10.3390/ma13214707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/17/2020] [Accepted: 10/19/2020] [Indexed: 11/24/2022]
Abstract
By combining density functional theory, quantum theory of atoms in molecules and transport properties calculations, we evaluated the thermoelectric properties of Sb-S system compounds and shed light on their relationships with electronic structures. The results show that, for Sb2S3, the large density of states (DOS) variation induces a large Seebeck coefficient. Taking into account the long-range weak bonds distribution, Sb2S3 should exhibit low lattice thermal conductivity. Therefore, Sb2S3 is promising for thermoelectric applications. The insertion of Be atoms into the Sb2S3 interstitial sites demonstrates the electrical properties and Seebeck coefficient anisotropy and sheds light on the understanding of the role of quasi-one-dimensional structure in the electron transport. The large interstitial sites existing in SbS2 are at the origin of phonons anharmonicity which counteracts the thermal transport. The introduction of Zn and Ga atoms into these interstitial sites could result in an enhancement of all the thermoelectric properties.
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Affiliation(s)
- Hailong Yang
- Campus St Jérôme, Aix-Marseille University, CNRS, Madirel, 13013 Marseille, France;
- Campus St Jérôme, Aix-Marseille University, University of Toulon, CNRS, IM2NP, 13013 Marseille, France;
| | - Pascal Boulet
- Campus St Jérôme, Aix-Marseille University, CNRS, Madirel, 13013 Marseille, France;
| | - Marie-Christine Record
- Campus St Jérôme, Aix-Marseille University, University of Toulon, CNRS, IM2NP, 13013 Marseille, France;
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