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Bijoy TK, Sudhakaran S, Lee SC. WS 2-Graphene van der Waals Heterostructure as Promising Anode Material for Lithium-Ion Batteries: A First-Principles Approach. ACS OMEGA 2024; 9:6482-6491. [PMID: 38371824 PMCID: PMC10870414 DOI: 10.1021/acsomega.3c06559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 01/08/2024] [Accepted: 01/12/2024] [Indexed: 02/20/2024]
Abstract
In this work, we report the results of density functional theory (DFT) calculations on a van der Waals (VdW) heterostructure formed by vertically stacking single-layers of tungsten disulfide and graphene (WS2/graphene) for use as an anode material in lithium-ion batteries (LIBs). The electronic properties of the heterostructure reveal that the graphene layer improves the electronic conductivity of this hybrid system. Phonon calculations demonstrate that the WS2/graphene heterostructure is dynamically stable. Charge transfer from Li to the WS2/graphene heterostructure further enhances its metallic character. Moreover, the Li binding energy in this heterostructure is higher than that of the Li metal's cohesive energy, significantly reducing the possibility of Li-dendrite formation in this WS2/graphene electrode. Ab initio molecular dynamics (AIMD) simulations of the lithiated WS2/graphene heterostructure show the system's thermal stability. Additionally, we explore the effect of heteroatom doping (boron (B) and nitrogen (N)) on the graphene layer of the heterostructure and its impact on Li-adsorption ability. The results suggest that B-doping strengthens the Li-adsorption energy. Notably, the calculated open-circuit voltage (OCV) and Li-diffusion energy barrier further support the potential of this heterostructure as a promising anode material for LIBs.
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Affiliation(s)
- T. K. Bijoy
- Indo-Korea
Science and Technology Center (IKST), Third Floor, Windsor, NCC Urban Building, New Airport Road, Yelahanka, Bengaluru 560065, India
| | - Sooryadas Sudhakaran
- Mechanical
Engineering Department, National Institute
of Technology Calicut, Calicut, Kerala 673601, India
| | - Seung-Cheol Lee
- Indo-Korea
Science and Technology Center (IKST), Third Floor, Windsor, NCC Urban Building, New Airport Road, Yelahanka, Bengaluru 560065, India
- Electronic
Materials Research Center, KIST, Seoul 136-791, South Korea
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2
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Ferdous N, Islam MS, Alam MS, Zamil MY, Biney J, Vatani S, Park J. Intriguing type-II g-GeC/AlN bilayer heterostructure for photocatalytic water decomposition and hydrogen production. Sci Rep 2023; 13:18778. [PMID: 37907550 PMCID: PMC10618537 DOI: 10.1038/s41598-023-45744-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 10/23/2023] [Indexed: 11/02/2023] Open
Abstract
Adapting two-dimensional (2D) van der Walls bilayer heterostructure is an efficient technique for realizing fascinating properties and playing a key role in solar energy-driven water decomposition schemes. By means of first-principles calculations, this study reveals the intriguing potential of a novel 2D van der Walls hetero-bilayer consisting of GeC and AlN layer in the photocatalytic water splitting method to generate hydrogen. The GeC/AlN heterostructure has an appropriate band gap of 2.05 eV, wherein the band edges are in proper energetic positions to provoke the water redox reaction to generate hydrogen and oxygen. The type-II band alignment of the bilayer facilitates the real-space spontaneous separation of the photogenerated electrons and holes in the different layers, improving the photocatalytic activity significantly. Analysis of the electrostatic potential and the charge density difference unravels the build-up of an inherent electric field at the interface, preventing electron-hole recombination. The ample absorption spectrum of the bilayer from the ultra-violet to the near-infrared region, reaching up to 8.71 × 105/cm, combined with the resiliency to the biaxial strain, points out the excellent photocatalytic performance of the bilayer heterostructure. On top of rendering useful information on the key features of the GeC/AlN hetero-bilayer, the study offers informative details on the experimental design of the van der Walls bilayer heterostructure for solar-to-hydrogen conversion applications.
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Affiliation(s)
- Naim Ferdous
- Department of Electrical and Biomedical Engineering, University of Nevada, Reno, NV, 89557, USA
| | - Md Sherajul Islam
- Department of Electrical and Biomedical Engineering, University of Nevada, Reno, NV, 89557, USA.
- Department of Electrical and Electronic Engineering, Khulna University of Engineering and Technology, Khulna, 9203, Bangladesh.
| | - Md Shahabul Alam
- Department of Electrical and Biomedical Engineering, University of Nevada, Reno, NV, 89557, USA
| | - Md Yasir Zamil
- Department of Electrical and Biomedical Engineering, University of Nevada, Reno, NV, 89557, USA
| | - Jeshurun Biney
- Department of Electrical and Biomedical Engineering, University of Nevada, Reno, NV, 89557, USA
| | - Sareh Vatani
- Department of Electrical and Biomedical Engineering, University of Nevada, Reno, NV, 89557, USA
| | - Jeongwon Park
- Department of Electrical and Biomedical Engineering, University of Nevada, Reno, NV, 89557, USA
- School of Electrical Engineering and Computer Science, University of Ottawa, Ottawa, ON, K1N6N5, Canada
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3
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Zhang C, Tan M, Lu X, Li W, Yu Y, Wang Q, Zhang W, Qiu X, Yang H. Photocatalytic water splitting for hydrogen production with high efficiency monolayer In 2Te 5: a theoretical study. Phys Chem Chem Phys 2023; 25:24960-24967. [PMID: 37695166 DOI: 10.1039/d3cp02615a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Employing density functional theory (DFT) calculations, we explore the excellent performance of two-dimensional (2D) semiconductor In2Te5 in photocatalytic water splitting at the theoretical level. The calculated results illustrate that 2D In2Te5 is a direct band gap semiconductor with a moderate band gap value and an ultrahigh optical absorption coefficient in the visible light region. It was found that its conduction band edge is higher than the reduction potential of water (-4.44 eV), which proves that it can split water to produce hydrogen. Furthermore, its excellent hydrogen evolution activity can be tuned under an appropriate biaxial strain. In addition, 2D In2Te5 shows a remarkable photo-generated current, suggesting that electrons and holes can be separated efficiently. Our results offer a superior candidate material for realizing photocatalytic water splitting for hydrogen evolution.
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Affiliation(s)
- Cong Zhang
- Department of Physics and Electronic Information, Weifang University, Weifang 261061, China.
| | - Meiping Tan
- Department of Physics and Electronic Information, Weifang University, Weifang 261061, China.
| | - Xin Lu
- Department of Physics and Electronic Information, Weifang University, Weifang 261061, China.
| | - Wenzhuo Li
- Department of Physics and Electronic Information, Weifang University, Weifang 261061, China.
| | - Yang Yu
- Department of Physics and Electronic Information, Weifang University, Weifang 261061, China.
| | - Qiang Wang
- Key laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao, 066104, China
| | - Wenjun Zhang
- Department of Physics and Electronic Information, Weifang University, Weifang 261061, China.
| | - Xiaole Qiu
- Department of Physics and Electronic Information, Weifang University, Weifang 261061, China.
| | - Hongchao Yang
- Department of Physics and Electronic Information, Weifang University, Weifang 261061, China.
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4
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Xu Y, Li D, Zeng Q, Sun H, Li P. Type-II 2D AgBr/SiH van der Waals heterostructures with tunable band edge positions and enhanced optical absorption coefficients for photocatalytic water splitting. RSC Adv 2023; 13:27676-27685. [PMID: 37731832 PMCID: PMC10507427 DOI: 10.1039/d3ra05079c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 09/11/2023] [Indexed: 09/22/2023] Open
Abstract
Utilizing two-dimensional (2D) heterostructures in photocatalysis can enhance optical ab-sorption and charge separation, thereby increasing solar energy conversion efficiency and tackling environmental issues. Density functional theory (DFT) was employed in this study to investigate the structural and optoelectronic properties of the AgBr/SiH van der Waals (vdW) heterostructures. All three configurations (A1, A2, and A3) were stable, with direct bandgaps of 1.83 eV, 0.99 eV, and 1.36 eV, respectively. The type-II band alignment in these structures enables electrons to be transferred from the SiH layer to the AgBr layer, and holes to move in the opposite direction. In the ultraviolet region, the optical absorption coefficients of the A1, A2, and A3 configurations are approximately 4.0 × 105 cm-1, significantly higher than that of an isolated AgBr monolayer (2.4 × 104 cm-1). In the visible light region, the A1 configuration has an absorption coefficient of 4 × 104 cm-1, higher than that of an isolated AgBr (2.2 × 104 cm-1). The band edges of the A1 configuration satisfy the redox potential for photocatalytic water splitting at pH 0-7. When the biaxial tensile strain is 5% for the A2 configuration and 2% for the A3 configuration, it can allow photocatalytic water splitting from half-reactions without strain to photocatalytic overall water splitting at pH 0-7. With a 5% biaxial tensile strain in the visible light region, the A1 and A3 configurations experience a rise in the maximum absorption coefficient of 5.7 × 104 cm-1 and 4.6 × 104 cm-1, respectively. The findings indicate that the AgBr/SiH vdW heterostructure configurations could be utilized in photocatalytic water-splitting processes with great potential.
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Affiliation(s)
- Yuehua Xu
- School of Microelectronics and Control Engineering, Changzhou University Changzhou 213164 Jiangsu China
| | - Dongze Li
- School of Microelectronics and Control Engineering, Changzhou University Changzhou 213164 Jiangsu China
| | - Qiang Zeng
- School of Microelectronics and Control Engineering, Changzhou University Changzhou 213164 Jiangsu China
| | - He Sun
- School of Microelectronics and Control Engineering, Changzhou University Changzhou 213164 Jiangsu China
| | - Pengfei Li
- Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences Hefei 230031 China
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Zhang W, Hou J, Bai M, He C, Wen J. Spontaneously enhanced visible-light-driven photocatalytic water splitting of type II PG/AlAs5 van der Waal heterostructure: A first-principles study. CHINESE CHEM LETT 2023. [DOI: 10.1016/j.cclet.2023.108270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Two-dimensional SiC/AlN based type-II van der Waals heterobilayer as a promising photocatalyst for overall water disassociation. Sci Rep 2022; 12:20106. [PMID: 36418922 PMCID: PMC9684528 DOI: 10.1038/s41598-022-24663-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 11/18/2022] [Indexed: 11/24/2022] Open
Abstract
Two-dimensional (2D) van der Waals (vdW) heterostructures made by vertical assembling of two different layers have drawn immense attention in the photocatalytic water disassociation process. Herein, we suggest a novel 2D/2D vdW heterobilayer consisting of silicon carbide (SiC) and aluminum nitride (AlN) as an exciting photocatalyst for solar-to-hydrogen conversion reactions using first-principles calculations. Notably, the heterostructure presents an inherent type-II band orientation wherein the photogenic holes and electrons are spatially separated in the SiC layer and the AlN layer, respectively. Our results indicate that the SiC/AlN heterostructure occupies a suitable band-gap of 2.97 eV which straddles the kinetic overpotentials of the hydrogen production reaction and oxygen production reaction. Importantly, the built-in electric field at the interface created by substantial charge transfer prohibits carrier recombination and further improves the photocatalytic performance. The heterostructure has an ample absorption profile ranging from the ultraviolet to the near-infrared regime, while the intensity of the absorption reaches up to 2.16 × 105 cm-1. In addition, external strain modulates the optical absorption of the heterostructure effectively. This work provides an intriguing insight into the important features of the SiC/AlN heterostructure and renders useful information on the experimental design of a novel vdW heterostructure for solar energy-driven water disassociation with superior efficiency.
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Baker EAD, Pitfield J, Price CJ, Hepplestone SP. Computational analysis of the enhancement of photoelectrolysis using transition metal dichalcogenide heterostructures. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:375001. [PMID: 35767988 DOI: 10.1088/1361-648x/ac7d2c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 06/29/2022] [Indexed: 06/15/2023]
Abstract
Finding a material with all the desired properties for a photocatalytic water splitter is a challenge yet to be overcome, requiring both a surface with ideal energetics for all steps in the hydrogen and oxygen evolution reactions (HER and OER) and a bulk band gap large enough to mediate said steps. We have instead examined separating these challenges by investigating the energetic properties of two-dimensional transition metal dichalcogenides (TMDCs) that could be used as a surface coating to a material with a large enough bulk band gap. First we investigated the energetics of monolayer MoS2and PdSe2using density functional theory and then investigated how these energetics changed when they were combined into a heterostructure. Our results show that the surface properties were practically (<0.2 eV) unchanged when combined and the MoS2layer aligns well with the OER and HER. This work highlights the potential of TMDC monolayers as surface coatings for bulk materials that have sufficient band gaps for photocatalytic applications.
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Affiliation(s)
- Edward A D Baker
- Department of Physics and Astronomy, University of Exeter, Stocker Road, Exeter EX4 4QL, United Kingdom
| | - Joe Pitfield
- Department of Physics and Astronomy, University of Exeter, Stocker Road, Exeter EX4 4QL, United Kingdom
| | - Conor J Price
- Department of Physics and Astronomy, University of Exeter, Stocker Road, Exeter EX4 4QL, United Kingdom
| | - Steven P Hepplestone
- Department of Physics and Astronomy, University of Exeter, Stocker Road, Exeter EX4 4QL, United Kingdom
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He Y, Zhu YH, Zhang M, Du J, Guo WH, Liu SM, Tian C, Zhong HX, Wang X, Shi JJ. High hydrogen production in the InSe/MoSi 2N 4 van der Waals heterostructure for overall water splitting. Phys Chem Chem Phys 2022; 24:2110-2117. [PMID: 35019921 DOI: 10.1039/d1cp04705a] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Very recently, the septuple-atomic-layer MoSi2N4 has been successfully synthesized by a chemical vapor deposition method. However, pristine MoSi2N4 exhibits some shortcomings, including poor visible-light harvesting capability and a low separation rate of photo-excited electron-hole pairs, when it is applied in water splitting to produce hydrogen. Fortunately, we find that MoSi2N4 can be considered as a good co-catalyst to be stacked with InSe forming an efficient heterostructure photocatalyst. Here, the electronic and photocatalytic properties of the two-dimensional (2D) InSe/MoSi2N4 heterostructure have been systematically investigated by density functional theory for the first time. The results demonstrate that 2D InSe/MoSi2N4 has a type-II band alignment with a favourable direct bandgap of 1.61 eV and exhibits suitable band edge positions for overall water splitting. Particularly, 2D InSe/MoSi2N4 has high electron mobility (104 cm2 V-1 s-1) and shows a noticeable optical absorption coefficient (105 cm-1) in the visible-light region of the solar spectrum. These brilliant properties declare that 2D InSe/MoSi2N4 is a potential photocatalyst for overall water splitting.
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Affiliation(s)
- Yong He
- State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University Yangtze Delta Institute of Optoelectronics, Peking University, Beijing 100871, China.
| | - Yao-Hui Zhu
- Physics Department, Beijing Technology and Business University, Beijing 100048, China.
| | - Min Zhang
- Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, China.
| | - Juan Du
- State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University Yangtze Delta Institute of Optoelectronics, Peking University, Beijing 100871, China.
| | - Wen-Hui Guo
- State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University Yangtze Delta Institute of Optoelectronics, Peking University, Beijing 100871, China.
| | - Shi-Ming Liu
- State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University Yangtze Delta Institute of Optoelectronics, Peking University, Beijing 100871, China.
| | - Chong Tian
- State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University Yangtze Delta Institute of Optoelectronics, Peking University, Beijing 100871, China.
| | - Hong-Xia Zhong
- School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China
| | - Xinqiang Wang
- State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University Yangtze Delta Institute of Optoelectronics, Peking University, Beijing 100871, China.
| | - Jun-Jie Shi
- State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University Yangtze Delta Institute of Optoelectronics, Peking University, Beijing 100871, China.
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9
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Guo R, Wei X, Cao M, Zhang Y, Yang Y, Fan J, Liu J, Tian Y, Zhao Z, Duan L. Optical and Tunable Electronic Properties of AlAs/InSe Van Der Waals Heterostructures. ACTA CHIMICA SINICA 2022. [DOI: 10.6023/a21120543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Pham KD. Tunability of the electronic properties and contact types of the silicane/MoSi 2N 4 heterostructure under an electric field. NEW J CHEM 2022. [DOI: 10.1039/d2nj03798j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stacking different two-dimensional materials to generate a vertical heterostructure has been considered a promising way to obtain the desired properties and to improve the device performance.
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Affiliation(s)
- Khang D. Pham
- Institute of Applied Technology, Thu Dau Mot University, Binh Duong Province, Vietnam
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11
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Nguyen ST, Nguyen CV, Nguyen-Ba K, Le-Quoc H, Hieu NV, Nguyen CQ. Electric field tunability of the electronic properties and contact types in the MoS 2/SiH heterostructure. RSC Adv 2022; 12:24172-24177. [PMID: 36128532 PMCID: PMC9403661 DOI: 10.1039/d2ra03817j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 08/09/2022] [Indexed: 12/03/2022] Open
Abstract
The generation of layered heterostructures with type-II band alignment is considered to be an effective tool for the design and fabrication of a highly efficient photocatalyst. In this work, we design a novel type-II MoS2/SiH HTS and investigate its atomic structure, electronic properties and contact types. In the ground state, the MoS2/SiH HTS is proved to be structurally and mechanically stable. The MoS2/SiH HTS generates type-II band alignment with separation of the photogenerated carriers. Both the electronic properties and contact type of the MoS2/SiH HTS can be modulated by an external electric field. The application of a negative electric field leads to a transformation from type-II to type-I band alignment. While the application of a positive electric field gives rise to a transition from semiconductor to metal in the MoS2/SiH HTS. These results could provide useful information for the design and fabrication of photoelectric devices on the MoS2/SiH HTS. The generation of layered heterostructures with type-II band alignment is considered to be an effective tool for the design and fabrication of a highly efficient photocatalyst.![]()
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Affiliation(s)
- Son-Tung Nguyen
- Faculty of Electrical Engineering, Hanoi University of Industry, Hanoi 100000, Vietnam
| | - Chuong V. Nguyen
- Department of Materials Science and Engineering, Le Quy Don Technical University, Hanoi, Vietnam
| | - Kien Nguyen-Ba
- The University of Danang – University of Science and Technology, Danang 550000, Vietnam
| | - Huy Le-Quoc
- The University of Danang – University of Science and Technology, Danang 550000, Vietnam
| | - Nguyen V. Hieu
- Physics Department, The University of Danang – University of Science and Education, Da Nang 550000, Vietnam
| | - Cuong Q. Nguyen
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
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Yeoh KH, Chew KH, Yoon TL, Chang YHR, Ong DS. A first-principles study of two-dimensional NbSe 2H/g-ZnO van der Waals heterostructures as a water splitting photocatalyst. Phys Chem Chem Phys 2021; 23:24222-24232. [PMID: 34668497 DOI: 10.1039/d1cp03565g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on first-principles calculations, we propose a new two-dimensional (2D) van der Waals (vdW) heterostructure that can be used as a photocatalyst for water splitting. The heterostructure consists of vertically stacked 2D NbSe2H and graphene-like ZnO (g-ZnO). Depending on the stacking orders, we identified two configurations that have high binding energies with an energy band gap of >2.6 eV. These 2D systems form a type-II heterostructure which enables the separation of photoexcited electrons and holes. The presence of a strong electrostatic potential difference across the 2D NbSe2H and g-ZnO interface is expected to suppress the electron-hole recombination leading to an enhancement in the efficiency of the photocatalytic activity. Our study also shows that the 2D NbSe2H/g-ZnO vdW heterostructure has good thermodynamic properties for water splitting. Furthermore, the optical absorption of the 2D NbSe2H/g-ZnO vdW heterostructure extends into the visible light region. Our results suggest that the 2D NbSe2H/g-ZnO vdW heterostructure is a promising photocatalytic material for water splitting.
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Affiliation(s)
- K H Yeoh
- Department of Electrical and Electronic Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, 43000 Kajang, Selangor, Malaysia. .,Center for Photonics and Advanced Material Research, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, 43000 Kajang, Selangor, Malaysia
| | - K-H Chew
- Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - T L Yoon
- School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Y H R Chang
- Faculty of Applied Sciences, Universiti Teknologi MARA, Cawangan Sarawak, 94300 Samarahan, Sarawak, Malaysia
| | - D S Ong
- Faculty of Engineering, Multimedia University, Persiaran Multimedia, 63100 Cyberjaya, Selangor, Malaysia
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13
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Lu J, Zhang X, Feng L, Gong D, Nie Y, Xiang G. BiOCl/group-IV Xene bilayer heterojunctions: stability and electronic and photocatalytic properties. Phys Chem Chem Phys 2021; 23:13323-13330. [PMID: 34096566 DOI: 10.1039/d1cp00752a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Vertical van der Waals heterojunctions (HJs) composed of a photocatalytic star material BiOCl monolayer and group-IV Xene monolayer (silicene, germanene etc.) were studied by using first-principles calculations. Formation energy analysis and molecular dynamics simulation show that the BiOCl/Xene bilayer HJs can exist stably up to room temperature. Owing to evident charge redistribution and accumulation occurring between the bilayers, electron-hole puddles form and charge carrier transfer and separation occur in the HJs, which are beneficial to the improvement of photocatalytic performance. The HJ energy bands maintain the Dirac cones with almost linear dispersion curves, suggesting low effective mass and high mobility of carriers, and can be effectively tuned by strain. Our results show that the BiOCl/Xene bilayer HJs with high separation efficiency and high mobility of carriers and strain-adjustable bandgaps provide varieties in the functionalities of 2D van der Waals HJs and show great potentials in photocatalytic applications.
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Affiliation(s)
- Jiating Lu
- College of Physics, Sichuan University, Chengdu, 610064, China. and College of Physics and Electronic Information Engineering, Qinghai Normal University, Xining 810008, China
| | - Xi Zhang
- College of Physics, Sichuan University, Chengdu, 610064, China.
| | - Leihao Feng
- College of Physics, Sichuan University, Chengdu, 610064, China.
| | - Dan Gong
- College of Physics, Sichuan University, Chengdu, 610064, China.
| | - Ya Nie
- College of Physics, Sichuan University, Chengdu, 610064, China.
| | - Gang Xiang
- College of Physics, Sichuan University, Chengdu, 610064, China.
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Jin Q, Dai X, Song J, Pu K, Wu X, An J, Zhao T. High photocatalytic performance of g-C3N4/WS2 heterojunction from first principles. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2021.111141] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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15
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Ali A, Zhang JM, Muhammad I, Shahid I, Huang YH, Wei XM, Kabir F. Theoretical perspective on the electronic structure and optoelectronic properties of type-II SiC/CrS 2van der Waals heterostructure with high carrier mobilities. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:215302. [PMID: 33684897 DOI: 10.1088/1361-648x/abeca6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 03/08/2021] [Indexed: 06/12/2023]
Abstract
Two-dimensional heterostructures formed by stacking layered materials play a significant role in condensed matter physics and materials science due to their potential applications in high-efficiency nanoelectronic and optoelectronic devices. In this paper, the structural, electronic, and optical properties of SiC/CrS2van der Waals heterostructure (vdWHs) have been investigated by means of density functional theory calculations. It is confirmed that the SiC/CrS2vdWHs is energetically and thermodynamically stable indicating its great promise for experimental realization. We find that the SiC/CrS2vdWHs has a direct-band gap and type-II (staggered) band alignment, which can effectively separate the photo-induced electrons and holes pairs and extend their life time. The carrier mobilities of electrons and holes along the armchair and zigzag directions are as high as 6.621 × 103and 6.182 × 104 cm2 V-1 s-1, respectively. Besides, the charge difference and potential drop across the interface can induce a large built-in electric field across the heterojunction, which will further hinder the electron and hole recombination. The SiC/CrS2vdWHs has enhanced optical absorption capability compared to individual monolayers. This study demonstrates that the SiC/CrS2vdWHs is a good candidate for application in the nanoelectronic and optoelectronic devices.
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Affiliation(s)
- Anwar Ali
- College of Physics and Information Technology, Shaanxi Normal University, Xian 710119, Shaanxi, People's Republic of China
| | - Jian-Min Zhang
- College of Physics and Information Technology, Shaanxi Normal University, Xian 710119, Shaanxi, People's Republic of China
| | - Iltaf Muhammad
- School of Microelectronics, Northwestern Polytechnical University, Xian 710072, Shaanxi, People's Republic of China
| | - Ismail Shahid
- School of Materials Science and Engineering, Computational Centre for Molecular Science, Institute of New Energy Material Chemistry, Nankai University, Tianjin 300350, People's Republic of China
| | - Yu-Hong Huang
- College of Physics and Information Technology, Shaanxi Normal University, Xian 710119, Shaanxi, People's Republic of China
| | - Xiu-Mei Wei
- College of Physics and Information Technology, Shaanxi Normal University, Xian 710119, Shaanxi, People's Republic of China
| | - Fazal Kabir
- School of Physics, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xian Jiaotong University, Xian 710049, Shaanxi, People's Republic of China
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