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Ali S, Ali S, Khan I, Zahid M, Muhammad Ismail P, Ismail A, Zada A, Ullah R, Hayat S, Ali H, Kamal MR, Alibrahim KA, Bououdina M, Hasnain Bakhtiar S, Wu X, Wang Q, Raziq F, Qiao L. Molecular modulation of interfaces in a Z-scheme van der Waals heterojunction for highly efficient photocatalytic CO 2 reduction. J Colloid Interface Sci 2024; 663:31-42. [PMID: 38387184 DOI: 10.1016/j.jcis.2024.02.081] [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: 11/12/2023] [Revised: 02/06/2024] [Accepted: 02/08/2024] [Indexed: 02/24/2024]
Abstract
The construction of van der Waals (vdW) heterojunctions is a key approach for efficient and stable photocatalysts, attracting marvellous attention due to their capacity to enhance interfacial charge separation/transfer and offer reactive sites. However, when a vdW heterojunction is made through an ex-situ assembly, electron transmission faces notable obstacles at the components interface due to the substantial spacing and potential barrier. Herein, we present a novel strategy to address this challenge via wet chemistry by synthesizing a functionalized graphene-modulated Z-scheme vdW heterojunction of zinc phthalocyanine/tungsten trioxide (xZnPc/yG-WO3). The functionalized G-modulation forms an electron "bridge" across the ZnPc/WO3 interface to improve electron transfer, get rid of barriers, and ultimately facilitating the optimal transfer of excited photoelectrons from WO3 to ZnPc. The Zn2+ in ZnPc picks up these excited photoelectrons, turning CO2 into CO/CH4 (42/22 μmol.g-1.h-1) to deliver 17-times better efficiency than pure WO3. Therefore, the introduction of a molecular "bridge" as a means to establish an electron transfer conduit represents an innovative approach to fabricate efficient photocatalysts designed for the conversion of CO2 into valued yields.
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Affiliation(s)
- Sharafat Ali
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology, Huzhou 313001, China; School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Sajjad Ali
- Energy, Water, and Environment Lab, College of Humanities and Sciences, Prince Sultan University, Riyadh 11586, Saudi Arabia
| | - Imran Khan
- School of Physics and Electronics, Central South University, 410083 Changsha, China
| | - Muhammad Zahid
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Pir Muhammad Ismail
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Ahmed Ismail
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Amir Zada
- Department of Chemistry, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa 23200, Pakistan
| | - Rizwan Ullah
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Salman Hayat
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Haider Ali
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Muhammad Rizwan Kamal
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Khuloud A Alibrahim
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University,Riyadh 11671, Saudi Arabia
| | - Mohamed Bououdina
- Energy, Water, and Environment Lab, College of Humanities and Sciences, Prince Sultan University, Riyadh 11586, Saudi Arabia
| | - Syedul Hasnain Bakhtiar
- School of Integrated Circuits, Wuhan National Laboratory for Optoelectronics, Engineering Research Center for Functional Ceramics of the Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xiaoqiang Wu
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Qingyuan Wang
- Institute for Advanced Study, Chengdu University, Chengdu, China.
| | - Fazal Raziq
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Liang Qiao
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology, Huzhou 313001, China; School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China.
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2
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Gul SH, Alrebdi TA, Idrees M, Amin B. Tunable electronic structures, Rashba splitting, and optical and photocatalytic responses of MSSe-PtO 2 (M = Mo, W) van der Waals heterostructures. NANOSCALE ADVANCES 2023; 5:5829-5837. [PMID: 37881719 PMCID: PMC10597551 DOI: 10.1039/d3na00347g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 08/23/2023] [Indexed: 10/27/2023]
Abstract
Binding energies, AIMD simulation and phonon spectra confirm both the thermal and dynamical stabilities of model-I and model-II of MSSe-PtO2 (M = Mo, W) vdWHs. An indirect type-II band alignment in both the models of MSSe-PtO2 vdWHs and a larger Rashba spin splitting in model-II than in model-I provide a platform for experimental design of MSSe-PtO2 vdWHs for optoelectronics and spintronic device applications. Transfer of electrons from the MSSe layer to the PtO2 layer at the interface of MSSe-PtO2 vdWHs makes MSSe (PtO2) p(n)-type. Large absorption in the visible region of MoSSe-PtO2 vdWHs, while blue shifts in WSSe-PtO2 vdWHs are observed. In the case of model-II of MSSe-PtO2 vdWHs, a further blue shift is observed. Furthermore, the photocatalytic response shows that MSSe-PtO2 vdWHs cross the standard water redox potentials confirming their capability to split water into H+/H2 and O2/H2O.
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Affiliation(s)
- Sadia H Gul
- Department of Physics, Abbottabad University of Science & Technology Abbottabad 22010 Pakistan +92-333-943-665 +92-333-943-665
| | - Tahani A Alrebdi
- Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University PO Box 84428 Riyadh 11671 Saudi Arabia
| | - M Idrees
- School of Physics and Electronic Engineering, Jiangsu University Zhenjiang 212013 Jiangsu China
| | - B Amin
- Department of Physics, Abbottabad University of Science & Technology Abbottabad 22010 Pakistan +92-333-943-665 +92-333-943-665
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3
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Li XH, Wang BJ, Yang XF, Yu WY, Ke SH. Substitutional doping of MoTe 2/ZrS 2 heterostructures for sustainable energy related applications. Phys Chem Chem Phys 2023; 25:27017-27026. [PMID: 37789808 DOI: 10.1039/d3cp03563h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Stacking and/or substitutional doping are effective strategies to tune two-dimensional materials with desired properties, greatly extending the applications of the pristine materials. Here, by employing first-principles calculations, we propose that a pristine MoTe2/ZrS2 heterostructure is a distinguished lithium-ion battery anode material with a low Li diffusion barrier (∼0.26 eV), and it has a high maximum Li storage capacity (476.36 mA h g-1) and a relatively low open-circuit voltage (0.16 V) at Li4/MoTe2/Li/ZrS2/Li4. The other heterostructures with different types can be achieved by substitutional doping and their potential applications in sustainable energy related areas are further unraveled. For instance, a type-II TeMoSe/ZrS2 heterostructure could be a potential direct Z-scheme photocatalyst for water splitting with a high solar-to-hydrogen conversion efficiency of 17.62%. The TeMoSe/SZrO heterostructure is predicted to be a potential candidate for application in highly efficient solar cells. Its maximum power conversion efficiency can be as high as 19.21%, which is quite promising for commercial applications. The present results will shed light on the sustainable energy applications of pristine or doped MoTe2/ZrS2 heterostructures in the future.
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Affiliation(s)
- Xiao-Hua Li
- School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Bao-Ji Wang
- School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Xue-Feng Yang
- School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - Wei-Yang Yu
- School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
| | - San-Huang Ke
- MOE Key Laboratory of Microstructured Materials, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China.
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Liu S, Carey T, Munuera J, Synnatschke K, Kaur H, Coleman E, Doolan L, Coleman JN. Solution-Processed Heterojunction Photodiodes Based on WSe 2 Nanosheet Networks. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2304735. [PMID: 37735147 DOI: 10.1002/smll.202304735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/25/2023] [Indexed: 09/23/2023]
Abstract
Solution-processed photodetectors incorporating liquid-phase-exfoliated transition metal dichalcogenide nanosheets are widely reported. However, previous studies mainly focus on the fabrication of photoconductors, rather than photodiodes which tend to be based on heterojunctions and are harder to fabricate. Especially, there are rare reports on introducing commonly used transport layers into heterojunctions based on nanosheet networks. In this study, a reliable solution-processing method is reported to fabricate heterojunction diodes with tungsten selenide (WSe2 ) nanosheets as the optical absorbing material and PEDOT: PSS and ZnO as injection/transport-layer materials. By varying the transport layer combinations, the obtained heterojunctions show rectification ratios of up to ≈104 at ±1 V in the dark, without relying on heavily doped silicon substrates. Upon illumination, the heterojunction can be operated in both photoconductor and photodiode modes and displays self-powered behaviors at zero bias.
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Affiliation(s)
- Shixin Liu
- School of Physics, CRANN & AMBER Research Centres, Trinity College, Dublin 2, Ireland
| | - Tian Carey
- School of Physics, CRANN & AMBER Research Centres, Trinity College, Dublin 2, Ireland
| | - Jose Munuera
- School of Physics, CRANN & AMBER Research Centres, Trinity College, Dublin 2, Ireland
- Department of Physics, Faculty of Sciences, University of Oviedo, C/Leopoldo Calvo Sotelo, 18 Oviedo, Asturias, 33007, Spain
| | - Kevin Synnatschke
- School of Physics, CRANN & AMBER Research Centres, Trinity College, Dublin 2, Ireland
| | - Harneet Kaur
- School of Physics, CRANN & AMBER Research Centres, Trinity College, Dublin 2, Ireland
| | - Emmet Coleman
- School of Physics, CRANN & AMBER Research Centres, Trinity College, Dublin 2, Ireland
| | - Luke Doolan
- School of Physics, CRANN & AMBER Research Centres, Trinity College, Dublin 2, Ireland
| | - Jonathan N Coleman
- School of Physics, CRANN & AMBER Research Centres, Trinity College, Dublin 2, Ireland
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5
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Ye X, Zhuang F, Si Y, He J, Xue Y, Li H, Wang K, Hao G, Zhang R. Direct Z-scheme GaN/WSe 2 heterostructure for enhanced photocatalytic water splitting under visible spectrum. RSC Adv 2023; 13:20179-20186. [PMID: 37409045 PMCID: PMC10319085 DOI: 10.1039/d3ra00928a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 05/17/2023] [Indexed: 07/07/2023] Open
Abstract
van der Waals heterostructures are widely used in the field of photocatalysis due to the fact that their properties can be regulated via an external electric field, strain engineering, interface rotation, alloying, doping, etc. to promote the capacity of discrete photogenerated carriers. Herein, we fabricated an innovative heterostructure by piling monolayer GaN on isolated WSe2. Subsequently, a first principles calculation based on density functional theory was performed to verify the two-dimensional GaN/WSe2 heterostructure and explore its interface stability, electronic property, carrier mobility and photocatalytic performance. The results demonstrated that the GaN/WSe2 heterostructure has a direct Z-type band arrangement and possesses a bandgap of 1.66 eV. The built-in electric field is caused by the transfer of positive charge between the WSe2 layers to the GaN layer, directly leading to the segregation of photogenerated electron-hole pairs. The GaN/WSe2 heterostructure has high carrier mobility, which is conducive to the transmission of photogenerated carriers. Furthermore, the Gibbs free energy changes to a negative value and declines continuously during the water splitting reaction into oxygen without supplementary overpotential in a neural environment, satisfying the thermodynamic demands of water splitting. These findings verify the enhanced photocatalytic water splitting under visible light and can be used as the theoretical basis for the practical application of GaN/WSe2 heterostructures.
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Affiliation(s)
- Xiaojun Ye
- School of Materials Science and Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Fangfang Zhuang
- School of Materials Science and Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Yuhan Si
- School of Materials Science and Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Jingwen He
- School of Materials Science and Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Yifan Xue
- School of Materials Science and Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Hongbo Li
- School of Materials Science and Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Kai Wang
- Shanghai Institute of Space Power-sources, State Key Laboratory of Space Power-sources Technology Shanghai 200245 China
| | - Guoqiang Hao
- School of Materials Science and Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Rui Zhang
- School of Materials Science and Engineering, East China University of Science and Technology Shanghai 200237 China
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6
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Sathyan B, Tomy AM, Pm N, Cyriac J. A facile strategy of using MoS 2 quantum dots for fluorescence-based targeted detection of nitrobenzene. RSC Adv 2023; 13:14614-14624. [PMID: 37188249 PMCID: PMC10177963 DOI: 10.1039/d3ra00912b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 04/26/2023] [Indexed: 05/17/2023] Open
Abstract
We present a simple approach for producing photoluminescent MoS2 quantum dots (QDs) using commercial MoS2 powder as a precursor along with NaOH and isopropanol. The synthesis method is particularly easy and environmentally friendly. The successful intercalation of Na+ ions into MoS2 layers and subsequent oxidative cutting reaction leads to the formation of luminescent MoS2 QDs. The present work, for the first time, shows the formation of MoS2 QDs without any additional energy source. The as-synthesized MoS2 QDs were characterized using microscopy and spectroscopy. The QDs have a few layer thicknesses and a narrow size distribution with an average diameter of ∼3.8 nm. Nitrobenzene (NB), an industrial chemical, is both toxic to human health and dangerously explosive. The present MoS2 QDs can be used as an effective photoluminescent probe, and a new turn-off sensor for NB detection. The selective quenching was operated via multiple mechanisms; electron transfer between the nitro group and MoS2 QDs through dynamic quenching and the primary inner filter effect (IFE). The quenching has a linear relationship with NB concentrations from 0.5 μM to 11 μM, with a calculated detection limit of 50 nM.
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Affiliation(s)
- Bhasha Sathyan
- Department of Chemistry, Indian Institute of Space Science and Technology Thiruvananthapuram Kerala 695 547 India
| | - Ann Mary Tomy
- Department of Chemistry, Indian Institute of Space Science and Technology Thiruvananthapuram Kerala 695 547 India
| | - Neema Pm
- Department of Chemistry, Indian Institute of Space Science and Technology Thiruvananthapuram Kerala 695 547 India
- School of Physics, Indian Institute of Science Education and Research Thiruvananthapuram India
| | - Jobin Cyriac
- Department of Chemistry, Indian Institute of Space Science and Technology Thiruvananthapuram Kerala 695 547 India
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7
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Zhang L, Qiu H, Shi R, Liu J, Ran G, Zhang W, Sun G, Long R, Fang W. Charge Transport Dynamics of Quasi-Type II Perovskite Janus Nanocrystals in High-Performance Photoconductors. J Phys Chem Lett 2023; 14:1823-1831. [PMID: 36779627 DOI: 10.1021/acs.jpclett.3c00198] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
CsPbBr3-Pb4S3Br2 Janus nanocrystals (NCs) are the only nanomaterial where the epitaxial structure of perovskite and chalcogenide materials has been realized at the nanoscale, but their exciton dynamics mechanism has not yet been thoroughly investigated or applied in photodetection applications. This work reports an attractive device performance of perovskite photoconductors based on epitaxial CsPbBr3-Pb4S3Br2 Janus NCs, as well as the carrier relaxation and transfer mechanism of the heterojunction. By a combination of transient optical absorption and quantum dynamics simulation, it is demonstrated that the photogenerated holes on CsPbBr3 can be successfully extracted by Pb4S3Br2, while the hole transfer proceeds about three times faster than energy loss and remains "hot" for about 300 fs. This feature has favorable effects on long-range charge separation and transport; therefore, the Janus NCs photoconductors exhibit an exceptional responsivity of 34.0 A W-1 and specific detectivity of 1.26 × 1014 Jones.
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Affiliation(s)
- Lin Zhang
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Key Laboratory of Energy Conversion and Storage Materials Institute, Beijing Normal University, Beijing, 100875, China
| | - Hengwei Qiu
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Ran Shi
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Key Laboratory of Energy Conversion and Storage Materials Institute, Beijing Normal University, Beijing, 100875, China
| | - Jinsong Liu
- Department of Physics and Applied Optics Beijing Area Major Laboratory, Center for Advanced Quantum Studies, Beijing Normal University, Beijing, 100875, China
| | - Guangliu Ran
- Department of Physics and Applied Optics Beijing Area Major Laboratory, Center for Advanced Quantum Studies, Beijing Normal University, Beijing, 100875, China
| | - Wenkai Zhang
- Department of Physics and Applied Optics Beijing Area Major Laboratory, Center for Advanced Quantum Studies, Beijing Normal University, Beijing, 100875, China
| | - Genban Sun
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Key Laboratory of Energy Conversion and Storage Materials Institute, Beijing Normal University, Beijing, 100875, China
| | - Run Long
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Key Laboratory of Energy Conversion and Storage Materials Institute, Beijing Normal University, Beijing, 100875, China
| | - Weihai Fang
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Key Laboratory of Energy Conversion and Storage Materials Institute, Beijing Normal University, Beijing, 100875, China
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8
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Cheng K, Hu W, Guo X, Wu L, Guo S, Su Y. Electronic structures and photovoltaic applications of vdW heterostructures based on Janus group-IV monochalcogenides: insights from first-principles calculations. Phys Chem Chem Phys 2023; 25:5663-5672. [PMID: 36734472 DOI: 10.1039/d2cp05663a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The van der Waals integration can help 2D materials modulate their properties and provide more opportunities for 2D materials in the next-generation high-performance optoelectronic devices. Using first-principles calculations, we explored the atomic and electronic structures of 2D pristine and Janus group-IV monochalcogenides and found the internal vertical electric field at Janus group-IV monochalcogenides. Then, we constructed vdW heterostructures with pristine and Janus group-IV monochalcogenides monolayers as building blocks and explored their atomic structures and band alignments. Our results demonstrate that these vdW heterostructures can be synthesized experimentally, and the surface termination of the Janus monolayer at the interface can significantly help the heterostructure realize the transition from type I to type II due to the intrinsic electric field. Moreover, we found eight vdW heterostructures with a mismatch of less than 5% exhibiting type II band alignment with charge densities of VBM and CBM mainly localized at different domains of heterostructures, and excellent power conversion efficiency (∼19%) in photovoltaics are also predicted for these heterostructures with type II band alignment. Our results not only give an idea to use the Janus monolayer as building blocks to construct vdW heterostructures and modulate their band alignment but also provide a guide to the experimental researcher to design more efficient photovoltaic devices with Janus group-IV monochalcogenides.
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Affiliation(s)
- Kai Cheng
- School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China.
| | - Wenbo Hu
- School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China.
| | - Xu Guo
- School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China.
| | - Lifan Wu
- School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China.
| | - Sandong Guo
- School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China.
| | - Yan Su
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China.
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9
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Wang M, Osella S, Brescia R, Liu Z, Gallego J, Cattelan M, Crisci M, Agnoli S, Gatti T. 2D MoS 2/BiOBr van der Waals heterojunctions by liquid-phase exfoliation as photoelectrocatalysts for hydrogen evolution. NANOSCALE 2023; 15:522-531. [PMID: 36511088 DOI: 10.1039/d2nr04970h] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
As a semiconductor used for the photocatalytic hydrogen evolution reaction (HER), BiOBr has received intensive attention in recent years. However, the high recombination of photoexcited charge carriers results in poor photocatalytic efficiency. The combination with other photoactive semiconductors might represent a valuable approach to deal with the intrinsic limitations of the material. Given that BiOBr has a 2D structure, we propose a simple liquid-phase exfoliation method to peel BiOBr microspheres into few-layer nanosheets. By tuning the weight ratio between the precursors, we prepare a series of 2D MoS2/BiOBr van der Waals (vdW) heterojunctions and study their behaviour as (photo)electrocatalysts for the HER, finding dramatic differences as a function of weight composition. Moreover, we found that pristine 2D BiOBr and the heterojunctions, with the exception of the 1% MoS2/BiOBr composition, undergo photocorrosion, with BiOBr being reduced to metallic Bi. These findings provide useful guidelines to design novel 2D material-based (photo)electrocatalysts for the production of sustainable fuels.
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Affiliation(s)
- Mengjiao Wang
- Institute of Physical Chemistry and Center for Materials Research (LaMa), Justus Liebig University, 35392 Giessen, Germany.
| | - Silvio Osella
- Chemical and Biological Systems Simulation Lab, Centre of New Technologies, University of Warsaw, 02097 Warsaw, Poland
| | - Rosaria Brescia
- Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego, 30, 16163 Genova, Italy
| | - Zheming Liu
- Nanochemistry Department, Istituto Italiano di Tecnologia, 16163 Genova, Italy
| | - Jaime Gallego
- Institute of Physical Chemistry and Center for Materials Research (LaMa), Justus Liebig University, 35392 Giessen, Germany.
| | - Mattia Cattelan
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Matteo Crisci
- Institute of Physical Chemistry and Center for Materials Research (LaMa), Justus Liebig University, 35392 Giessen, Germany.
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Teresa Gatti
- Institute of Physical Chemistry and Center for Materials Research (LaMa), Justus Liebig University, 35392 Giessen, Germany.
- Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy.
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10
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Pang Q, Xin H, Chai R, Gao D, Zhao J, Xie Y, Song Y. In-Plane Strain Tuned Electronic and Optical Properties in Germanene-MoSSe Heterostructures. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3498. [PMID: 36234627 PMCID: PMC9565274 DOI: 10.3390/nano12193498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 09/30/2022] [Accepted: 10/03/2022] [Indexed: 06/16/2023]
Abstract
DFT calculations are performed to investigate the electronic and optical absorption properties of two-dimensional heterostructures constructed by Janus MoSSe and germanene. It is found that a tiny gap can be opened up at the Dirac point in both Ge/SMoSe and Ge/SeMoS heterostructures, with intrinsic high-speed carrier mobility of the germanene layer being well preserved. An n-type Schottky contact is formed in Ge/SMoSe, while a p-type one is formed in Ge/SeMoS. Compared to corresponding individual layers, germanene-MoSSe heterostructures can exhibit extended optical absorption ability, ranging from ultraviolet to infrared light regions. The position of the Dirac cone, the Dirac gap value as well as the position of the optical absorption peak for both Ge/SMoSe and Ge/SeMoS heterostructures can be tuned by in-plane biaxial strains. It is also predicted that a Schottky-Ohmic transition can occur when suitable in-plane strain is imposed (especially tensile strain) on heterostructures. These results can provide a helpful guide for designing future nanoscale optoelectronic devices based on germanene-MoSSe vdW heterostructures.
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Affiliation(s)
- Qing Pang
- College of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China
| | - Hong Xin
- College of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China
| | - Ruipeng Chai
- College of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China
| | - Dangli Gao
- College of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China
- Shaanxi Key Laboratory of Nano Materials and Technology, Xi’an University of Architecture and Technology, Xi’an 710055, China
| | - Jin Zhao
- College of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China
| | - You Xie
- College of Science, Xi’an University of Science and Technology, Xi’an 710054, China
| | - Yuling Song
- College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China
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11
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Zhao K, He D, Fu S, Bai Z, Miao Q, Huang M, Wang Y, Zhang X. Interfacial Coupling and Modulation of van der Waals Heterostructures for Nanodevices. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3418. [PMID: 36234543 PMCID: PMC9565824 DOI: 10.3390/nano12193418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/09/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
In recent years, van der Waals heterostructures (vdWHs) of two-dimensional (2D) materials have attracted extensive research interest. By stacking various 2D materials together to form vdWHs, it is interesting to see that new and fascinating properties are formed beyond single 2D materials; thus, 2D heterostructures-based nanodevices, especially for potential optoelectronic applications, were successfully constructed in the past few decades. With the dramatically increased demand for well-controlled heterostructures for nanodevices with desired performance in recent years, various interfacial modulation methods have been carried out to regulate the interfacial coupling of such heterostructures. Here, the research progress in the study of interfacial coupling of vdWHs (investigated by Photoluminescence, Raman, and Pump-probe spectroscopies as well as other techniques), the modulation of interfacial coupling by applying various external fields (including electrical, optical, mechanical fields), as well as the related applications for future electrics and optoelectronics, have been briefly reviewed. By summarizing the recent progress, discussing the recent advances, and looking forward to future trends and existing challenges, this review is aimed at providing an overall picture of the importance of interfacial modulation in vdWHs for possible strategies to optimize the device's performance.
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Alrebdi TA, Idrees M, Alkallas F, Amin B. In-situ formation of Are-MXY(M = Mo, W; (X ≠ Y) = S, Se, Te) van der Waals heterostructure. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Alam Q, Sardar S, Din HU, Khan SA, Idrees M, Amin B, Rehman F, Muhammad S, Laref A. A first principles study of a van der Waals heterostructure based on MS 2 (M = Mo, W) and Janus CrSSe monolayers. NANOSCALE ADVANCES 2022; 4:3557-3565. [PMID: 36134356 PMCID: PMC9400489 DOI: 10.1039/d2na00298a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 07/02/2022] [Indexed: 06/16/2023]
Abstract
The strategy of stacking two-dimensional materials for designing van der Waals heterostructures has gained tremendous attention in realizing innovative device applications in optoelectronics and renewable energy sources. Here, we performed the first principles calculations of the geometry, optoelectronic and photocatalytic performance of MS2-CrSSe (M = Mo, W) vdW heterostructures. The mirror asymmetry in the Janus CrSSe system allows the designing of two models of the MS2-CrSSe system by replacing S/Se atoms at opposite surfaces in CrSSe. The feasible configurations of both models of the MS2-CrSSe system are found energetically, dynamically and thermally stable. The studied heterobilayers possess an indirect type-I band alignment, indicating that the recombination of photogenerated electrons and holes in the CrSSe monolayer is hence crucial for photodetectors and laser applications. Remarkably, a red-shift in the optical absorption spectra of MS2-CrSSe makes them potential candidates for light harvesting applications. More interestingly, all heterobilayers (except W(Mo)S2-CrSSe of model-I(II)) reveal appropriate band edge positions of the oxidation and reduction potentials of the photocatalysis of water dissociation into H+/H2 and O2/H2O at pH = 0. These results shed light on the practical design of the MS2-CrSSe system for efficient optoelectronic and photocatalytic water splitting applications.
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Affiliation(s)
- Q Alam
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - S Sardar
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - H U Din
- Department of Physics, Bacha Khan University Charsadda KP Pakistan
| | - S A Khan
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - M Idrees
- Department of Physics, Abbottabad University of Science & Technology Havelian Abbottabad KP Pakistan
| | - B Amin
- Department of Physics, Abbottabad University of Science & Technology Havelian Abbottabad KP Pakistan
| | - F Rehman
- Department of Physics, Khushal Khan Khattak University Karak KP Pakistan
| | - Saleh Muhammad
- Department of Physics, Hazara University Mansehra KP Pakistan
| | - A Laref
- Department of Physics and Astronomy, College of Science, King Saud University Riyadh 11451 Saudi Arabia
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14
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Choi E, Sim KI, Burch KS, Lee YH. Emergent Multifunctional Magnetic Proximity in van der Waals Layered Heterostructures. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200186. [PMID: 35596612 PMCID: PMC9313546 DOI: 10.1002/advs.202200186] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 04/01/2022] [Indexed: 05/10/2023]
Abstract
Proximity effect, which is the coupling between distinct order parameters across interfaces of heterostructures, has attracted immense interest owing to the customizable multifunctionalities of diverse 3D materials. This facilitates various physical phenomena, such as spin order, charge transfer, spin torque, spin density wave, spin current, skyrmions, and Majorana fermions. These exotic physics play important roles for future spintronic applications. Nevertheless, several fundamental challenges remain for effective applications: unavoidable disorder and lattice mismatch limits in the growth process, short characteristic length of proximity, magnetic fluctuation in ultrathin films, and relatively weak spin-orbit coupling (SOC). Meanwhile, the extensive library of atomically thin, 2D van der Waals (vdW) layered materials, with unique characteristics such as strong SOC, magnetic anisotropy, and ultraclean surfaces, offers many opportunities to tailor versatile and more effective functionalities through proximity effects. Here, this paper focuses on magnetic proximity, i.e., proximitized magnetism and reviews the engineering of magnetism-related functionalities in 2D vdW layered heterostructures for next-generation electronic and spintronic devices. The essential factors of magnetism and interfacial engineering induced by magnetic layers are studied. The current limitations and future challenges associated with magnetic proximity-related physics phenomena in 2D heterostructures are further discussed.
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Affiliation(s)
- Eun‐Mi Choi
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS)Sungkyunkwan University (SKKU)Suwon16419Republic of Korea
| | - Kyung Ik Sim
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS)Sungkyunkwan University (SKKU)Suwon16419Republic of Korea
| | - Kenneth S. Burch
- Department of PhysicsBoston College140 Commonwealth AveChestnut HillMA02467‐3804USA
| | - Young Hee Lee
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS)Sungkyunkwan University (SKKU)Suwon16419Republic of Korea
- Department of Energy ScienceSungkyunkwan UniversitySuwon16419Republic of Korea
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15
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Li N, Okmi A, Jabegu T, Zheng H, Chen K, Lomashvili A, Williams W, Maraba D, Kravchenko I, Xiao K, He K, Lei S. van der Waals Semiconductor Empowered Vertical Color Sensor. ACS NANO 2022; 16:8619-8629. [PMID: 35436098 DOI: 10.1021/acsnano.1c09875] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Biomimetic artificial vision is receiving significant attention nowadays, particularly for the development of neuromorphic electronic devices, artificial intelligence, and microrobotics. Nevertheless, color recognition, the most critical vision function, is missed in the current research due to the difficulty of downscaling of the prevailing color sensing devices. Conventional color sensors typically adopt a lateral color sensing channel layout and consume a large amount of physical space, whereas compact designs suffer from an unsatisfactory color detection accuracy. In this work, we report a van der Waals semiconductor-empowered vertical color sensing structure with the emphasis on compact device profile and precise color recognition capability. More attractive, we endow color sensor hardware with the function of chromatic aberration correction, which can simplify the design of an optical lens system and, in turn, further downscales the artificial vision systems. Also, the dimension of a multiple pixel prototype device in our study confirms the scalability and practical potentials of our developed device architecture toward the above applications.
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Affiliation(s)
- Ningxin Li
- Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, United States
| | - Aisha Okmi
- Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, United States
- Department of Physics, Jazan University, Jazan 45142, Saudi Arabia
| | - Tara Jabegu
- Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, United States
| | - Hongkui Zheng
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Kuangcai Chen
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Alexander Lomashvili
- Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, United States
| | - Westley Williams
- Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, United States
| | - Diren Maraba
- Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, United States
| | - Ivan Kravchenko
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Kai Xiao
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Kai He
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
- Department of Material Science and Engineering, University of California, Irvine, California 92697, United States
| | - Sidong Lei
- Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, United States
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16
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Galashev AY, Rakhmanova O. Two-layer silicene on the SiC substrate: lithiation investigation in the molecular dynamics experiment. Chemphyschem 2022; 23:e202200250. [PMID: 35712866 DOI: 10.1002/cphc.202200250] [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: 04/13/2022] [Revised: 06/08/2022] [Indexed: 11/10/2022]
Abstract
The functioning of the lithium ion battery anode composed of silicene/SiC composite is studied by the method of molecular dynamics. In this composite, silicene has vacancy defects of different sizes. Approximately the same degree of filling of such an anode with lithium is shown for both horizontal and vertical intercalations. However, during the horizontal intercalation as opposed to vertical one, lithium atoms not only fill the channel and deposit on its walls, but also penetrate into the substrate. In both cases, the self-diffusion coefficients of lithium atoms have similar values. However, the process of filling the system with lithium occurs with a smoother change in the total energy, when the intercalation is performed vertically. A detailed study of the lithium atoms packing via the construction of Voronoi polyhedra for each of the systems under consideration shows the better uniformity of the Li atoms distribution over the volume of the system during the vertical intercalation.
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Affiliation(s)
- Alexander Y Galashev
- Institute of High-Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences: Institut vysokotemperaturnoj elektrohimii Ural'skogo otdelenia Rossijskoj akademii nauk, Laboratory of electrode processes, Akademicheskaya Str., 20, 620990, Yekaterinburg, RUSSIAN FEDERATION
| | - Oksana Rakhmanova
- Institute of High-Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences: Institut vysokotemperaturnoj elektrohimii Ural'skogo otdelenia Rossijskoj akademii nauk, Departament of Electrolysis, Akademicheskaya Str., 20, 620990, Yekaterinburg, RUSSIAN FEDERATION
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17
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Continuous photocatalysis via Z-scheme based nanocatalyst system for environmental remediation of pharmaceutically active compound: Modification, reaction site, defect engineering and challenges on the nanocatalyst. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118745] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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18
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Nascimento GM, Ogoshi E, Fazzio A, Acosta CM, Dalpian GM. High-throughput inverse design and Bayesian optimization of functionalities: spin splitting in two-dimensional compounds. Sci Data 2022; 9:195. [PMID: 35487920 PMCID: PMC9054849 DOI: 10.1038/s41597-022-01292-8] [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: 10/06/2021] [Accepted: 03/03/2022] [Indexed: 11/15/2022] Open
Abstract
The development of spintronic devices demands the existence of materials with some kind of spin splitting (SS). In this Data Descriptor, we build a database of ab initio calculated SS in 2D materials. More than that, we propose a workflow for materials design integrating an inverse design approach and a Bayesian inference optimization. We use the prediction of SS prototypes for spintronic applications as an illustrative example of the proposed workflow. The prediction process starts with the establishment of the design principles (the physical mechanism behind the target properties), that are used as filters for materials screening, and followed by density functional theory (DFT) calculations. Applying this process to the C2DB database, we identify and classify 358 2D materials according to SS type at the valence and/or conduction bands. The Bayesian optimization captures trends that are used for the rationalized design of 2D materials with the ideal conditions of band gap and SS for potential spintronics applications. Our workflow can be applied to any other material property. Measurement(s) | Spin polarized and spin-orbit coupling band structures • Spin-splitting type at the valence and/or conduction bands | | Technology Type(s) | Density functional theory • Bayesian optimization and High-throughput calculations | | | | | Factor Type(s) | Atomic composition and stoichiometry of two-dimensional compounds • Crystalline structure of two-dimensional compounds |
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Affiliation(s)
- Gabriel M Nascimento
- Center for Natural and Human Sciences, Federal University of ABC, Santo Andre, SP, Brazil
| | - Elton Ogoshi
- Center for Natural and Human Sciences, Federal University of ABC, Santo Andre, SP, Brazil
| | - Adalberto Fazzio
- Center for Natural and Human Sciences, Federal University of ABC, Santo Andre, SP, Brazil.,Brazilian Nanotechnology National Laboratory (LNNano), CNPEM, 13083-970, Campinas, São Paulo, Brazil
| | - Carlos Mera Acosta
- Center for Natural and Human Sciences, Federal University of ABC, Santo Andre, SP, Brazil.
| | - Gustavo M Dalpian
- Center for Natural and Human Sciences, Federal University of ABC, Santo Andre, SP, Brazil.
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19
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Kolos M, Karlický F. The electronic and optical properties of III–V binary 2D semiconductors: how to achieve high precision from accurate many-body methods. Phys Chem Chem Phys 2022; 24:27459-27466. [DOI: 10.1039/d2cp04432c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We tested the precision of accurate many-body GW and BSE methods on seven hexagonal 2D III–V binary semiconductors (BN, BP, BAs, AlN, GaN, GaP, and GaAs), and we provided benchmark electronic and optical properties.
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Affiliation(s)
- Miroslav Kolos
- Department of Physics, Faculty of Science, University of Ostrava, 30. dubna 22, 701 03, Ostrava, Czech Republic
| | - František Karlický
- Department of Physics, Faculty of Science, University of Ostrava, 30. dubna 22, 701 03, Ostrava, Czech Republic
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20
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21
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Torres-Cavanillas R, Morant-Giner M, Escorcia-Ariza G, Dugay J, Canet-Ferrer J, Tatay S, Cardona-Serra S, Giménez-Marqués M, Galbiati M, Forment-Aliaga A, Coronado E. Spin-crossover nanoparticles anchored on MoS 2 layers for heterostructures with tunable strain driven by thermal or light-induced spin switching. Nat Chem 2021; 13:1101-1109. [PMID: 34621077 DOI: 10.1038/s41557-021-00795-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 08/11/2021] [Indexed: 11/09/2022]
Abstract
In the past few years, the effect of strain on the optical and electronic properties of MoS2 layers has attracted particular attention as it can improve the performance of optoelectronic and spintronic devices. Although several approaches have been explored, strain is typically externally applied on the two-dimensional material. In this work, we describe the preparation of a reversible 'self-strainable' system in which the strain is generated at the molecular level by one component of a MoS2-based composite material. Spin-crossover nanoparticles were covalently grafted onto functionalized layers of semiconducting MoS2 to form a hybrid heterostructure. Their ability to switch between two spin states on applying an external stimulus (light irradiation or temperature change) serves to generate strain over the MoS2 layer. A volume change accompanies this spin crossover, and the created strain induces a substantial and reversible change of the electrical and optical properties of the heterostructure.
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Affiliation(s)
| | - Marc Morant-Giner
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | | | - Julien Dugay
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | - Josep Canet-Ferrer
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | - Sergio Tatay
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | | | | | - Marta Galbiati
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | | | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain.
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22
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Huang PY, Qin JK, Zhu CY, Zhen L, Xu CY. 2D-1D mixed-dimensional heterostructures: progress, device applications and perspectives. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:493001. [PMID: 34479213 DOI: 10.1088/1361-648x/ac2388] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
Two-dimensional (2D) materials have attracted broad interests and been extensively exploited for a variety of functional applications. Moreover, one-dimensional (1D) atomic crystals can also be integrated into 2D templates to create mixed-dimensional heterostructures, and the versatility of combinations provides 2D-1D heterostructures plenty of intriguing physical properties, making them promising candidate to construct novel electronic and optoelectronic nanodevices. In this review, we first briefly present an introduction of relevant fabrication methods and structural configurations for 2D-1D heterostructures integration. We then discuss the emerged intriguing physics, including high optical absorption, efficient carrier separation, fast charge transfer and plasmon-exciton interconversion. Their potential applications such as electronic/optoelectronic devices, photonic devices, spintronic devices and gas sensors, are also discussed. Finally, we provide a brief perspective for the future opportunities and challenges in this emerging field.
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Affiliation(s)
- Pei-Yu Huang
- Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, People's Republic of China
| | - Jing-Kai Qin
- Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, People's Republic of China
| | - Cheng-Yi Zhu
- Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, People's Republic of China
| | - Liang Zhen
- Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, People's Republic of China
- MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Harbin Institute of Technology, Harbin 150080, People's Republic of China
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
| | - Cheng-Yan Xu
- Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, People's Republic of China
- MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Harbin Institute of Technology, Harbin 150080, People's Republic of China
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23
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Li S, Wang Y, Cheng P, Feng B, Chen L, Wu K. Realization of Large Scale, 2D van der Waals Heterojunction of SnS 2 /SnS by Reversible Sulfurization. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2101154. [PMID: 34331375 DOI: 10.1002/smll.202101154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 05/25/2021] [Indexed: 06/13/2023]
Abstract
2D van der Waals heterojunction provides an attractive opportunity for realizing novel electronic or optoelectronic devices. It remains challenging to realize high-quality heterostructures through scalable methods such as molecular epitaxy growth (MBE). Here, growth of few-layer SnS thin films is reported on mica and Nb-doped SrTiO3 (100) substrates by MBE. Then the top layer of SnS film is uniformly sulfurized to monolayer SnS2 in a sulfur atmosphere, resulting in a high-quality SnS2 /SnS 2D heterojunction. Furthermore, the SnS2 layer can be recovered to SnS by annealing SnS2 /SnS without sulfur supply, indicating the heterojunction formation is reversible. The scanning tunneling spectroscopy measurements on SnS2 /SnS heterostructure indicate the type-II band alignment in SnS2 /SnS. The work provides a promising approach to construct artificial 2D heterojunctions with desired properties, which could be extended to other sulfide and selenide systems.
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Affiliation(s)
- Shuhui Li
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Yu Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Peng Cheng
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Baojie Feng
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Lan Chen
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Kehui Wu
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
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Nayak S, Parida K. Recent Progress in LDH@Graphene and Analogous Heterostructures for Highly Active and Stable Photocatalytic and Photoelectrochemical Water Splitting. Chem Asian J 2021; 16:2211-2248. [PMID: 34196114 DOI: 10.1002/asia.202100506] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 06/25/2021] [Indexed: 01/16/2023]
Abstract
Photocatalytic (PC) and photoelectrochemical (PEC) water splitting is a plethora of green technological process, which transforms copiously available photon energy into valuable chemical energy. With the augmentation of modern civilization, developmental process of novel semiconductor photocatalysts proceeded at a sweltering rate, but the overall energy conversion efficiency of semiconductor photocatalysts in PC/PEC is moderately poor owing to the instability ariseing from the photocorrosion and messy charge configuration. Particularly, layered double hydroxides (LDHs) as reassuring multifunctional photocatalysts, turned out to be intensively investigated owing to the lamellar structure and exceptional physico-chemical properties. However, major drawbacks of LDHs material are its low conductivity, sluggish mass transfer and structural instability in acidic media, which hinder their applicability and stability. To surmount these obstacles, the formation of LDH@graphene and analogus heterostructures could proficiently amalgamate multi-functionalities, compensate distinct shortcomings, and endow novel properties, which ensure effective charge separation to result in stability and superior catalytic activities. Herein, we aim to summarize the currently updated synthetic strategies used to design heterostructures of 2D LDHs with 2D/3D graphene and graphene analogus material as graphitic carbon nitride (g-C3 N4 ), and MoS2 as mediator, or interlayer support, or co-catalyst or vice versa for superior PC/PEC water splitting activities along with long-term stabilities. Furthermore, latest characterization technique measuring the stability along with variant interface mode for imparting charge separation in LDH@graphene and graphene analogus heterostructure has been identified in this field of research with understanding the intrinsic structural features and activities.
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Affiliation(s)
- Susanginee Nayak
- Centre for Nano Science and Nano Technology, ITER, Siksha 'O' Anusandhan Deemed to be University, Bhubaneswar, 751030, Odisha, India
| | - Kulamani Parida
- Centre for Nano Science and Nano Technology, ITER, Siksha 'O' Anusandhan Deemed to be University, Bhubaneswar, 751030, Odisha, India
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25
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Chen Y, Sun M. Two-dimensional WS 2/MoS 2 heterostructures: properties and applications. NANOSCALE 2021; 13:5594-5619. [PMID: 33720254 DOI: 10.1039/d1nr00455g] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The successful fabrication of WS2/MoS2 heterostructures provides more possibilities for optoelectronic and thermoelectric applications than graphene because of their direct bandgap characteristics; therefore, scientific investigations on WS2/MoS2 heterostructures are more significant and thriving. In this paper, we review the latest research progress in WS2/MoS2 heterostructures, and look forward to their properties and applications. Firstly, we analyze the crystal structure and electronic structure of WS2, MoS2, and their heterostructures. Secondly, we comprehensively present the widely used methods for preparing heterostructures. Finally, based on the unique physical characteristics of WS2/MoS2 heterostructures, we focus on their properties and applications in mechanics, electronics, optoelectronics, and thermoelectronics.
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Affiliation(s)
- Yichuan Chen
- School of Mathematics and Physics, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, PR China.
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26
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Rahman MH, Chowdhury EH, Redwan DA, Mitra S, Hong S. Characterization of the mechanical properties of van der Waals heterostructures of stanene adsorbed on graphene, hexagonal boron-nitride and silicon carbide. Phys Chem Chem Phys 2021; 23:5244-5253. [PMID: 33629670 DOI: 10.1039/d0cp06426b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stanene has revealed a new horizon in the field of quantum condensed matter and energy conversion devices but its significantly lower tensile strength limits its further applications and effective operation in these nanodevices. Van der Waals heterostructures have given substantial flexibility to integrate different two-dimensional (2D) layered materials over the past few years and have proven highly functional with exceptional features, appealing applications, and innovative physics. Considerable efforts have been made for the preparation, thorough understanding, and applications of van der Waals heterostructures in the fields of electronics and optoelectronics. In this paper, we have executed Molecular Dynamics (MD) simulations to predict the tensile strength of van der Waals heterostructures of stanene (Sn) adsorbed on graphene (Gr), hexagonal boron nitride (hBN), and silicon carbide (SiC) (Sn/Gr, Sn/hBN, and Sn/SiC, respectively) subjected to both armchair and zigzag directional loading at different strain rates for the first time, which has enticing applications in electronic, optoelectronic, energy storage and bio-engineered devices. Among all the van der Waals heterostructures, the Sn/SiC heterostructure exhibits the lowest tensile strength and tensile strain. Furthermore, it has been found that zigzag directional loading could endure more tensile strain before fracture. Besides, it has been disclosed that though the rule of mixtures may accurately reproduce the Young's modulus of these heterostructures, it has limitations to predict the tensile strength. Fracture analysis suggests that for the Sn/hBN heterostructure the fracture initiates from the stanene layer while for the Sn/Gr and Sn/SiC heterostructures the fracture initiates from the Gr and SiC layer, respectively, for both armchair and zigzag directional loading. Overall, this study would aid in the design and efficient operation of Sn/Gr, Sn/hBN, and Sn/SiC heterostructures when subjected to mechanical force.
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Affiliation(s)
- Md Habibur Rahman
- Department of Mechanical Engineering, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh
| | - Emdadul Haque Chowdhury
- Department of Mechanical Engineering, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh
| | - Didarul Ahasan Redwan
- Department of Mechanical Engineering, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh
| | - Shailee Mitra
- Department of Mechanical Engineering, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh
| | - Sungwook Hong
- Department of Physics and Engineering, California State University, Bakersfield, Bakersfield, 93311, USA.
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Cai W, Wang J, He Y, Liu S, Xiong Q, Liu Z, Zhang Q. Strain-Modulated Photoelectric Responses from a Flexible α-In 2Se 3/3R MoS 2 Heterojunction. NANO-MICRO LETTERS 2021; 13:74. [PMID: 34138284 PMCID: PMC8128968 DOI: 10.1007/s40820-020-00584-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 12/08/2020] [Indexed: 06/12/2023]
Abstract
Semiconducting piezoelectric α-In2Se3 and 3R MoS2 have attracted tremendous attention due to their unique electronic properties. Artificial van der Waals (vdWs) heterostructures constructed with α-In2Se3 and 3R MoS2 flakes have shown promising applications in optoelectronics and photocatalysis. Here, we present the first flexible α-In2Se3/3R MoS2 vdWs p-n heterojunction devices for photodetection from the visible to near infrared region. These heterojunction devices exhibit an ultrahigh photoresponsivity of 2.9 × 103 A W-1 and a substantial specific detectivity of 6.2 × 1010 Jones under a compressive strain of - 0.26%. The photocurrent can be increased by 64% under a tensile strain of + 0.35%, due to the heterojunction energy band modulation by piezoelectric polarization charges at the heterojunction interface. This work demonstrates a feasible approach to enhancement of α-In2Se3/3R MoS2 photoelectric response through an appropriate mechanical stimulus.
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Affiliation(s)
- Weifan Cai
- Center for Micro- and Nano-Electronics, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Jingyuan Wang
- Center for Micro- and Nano-Electronics, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Yongmin He
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Sheng Liu
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Qihua Xiong
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Zheng Liu
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Qing Zhang
- Center for Micro- and Nano-Electronics, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
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Liu DS, Wu J, Xu H, Wang Z. Emerging Light-Emitting Materials for Photonic Integration. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2003733. [PMID: 33306201 DOI: 10.1002/adma.202003733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 07/26/2020] [Indexed: 06/12/2023]
Abstract
The arrival of the information explosion era is urging the development of large-bandwidth high-data-rate optical interconnection technology. Up to now, the biggest stumbling block in optical interconnections has been the lack of efficient light sources despite significant progress that has been made in germanium-on-silicon (Ge-on-Si) and III-V-on-silicon (III-V-on-Si) lasers. 2D materials and metal halide perovskites have attracted much attention in recent years, and exhibit distinctive advantages in the application of on-chip light emitters. Herein, this Progress Report reviews the recent progress made in light-emitting materials with a focus on new materials, i.e., 2D materials and metal halide perovskites. The report briefly introduces the current status of Ge-on-Si and III-V-on-Si lasers and discusses the advances of 2D and perovskite light-emitting materials for photonic integration, including their optical properties, preparation methods, as well as the light sources based on these materials. Finally, challenges and perspectives of these emerging materials on the way to the efficient light sources are discussed.
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Affiliation(s)
- De-Sheng Liu
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Jiang Wu
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Hongxing Xu
- School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Zhiming Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
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Zhu X, He J, Zhang R, Cong C, Zheng Y, Zhang H, Zhang S, Chen L. Effects of dielectric screening on the excitonic and critical points properties of WS 2/MoS 2 heterostructures. NANOSCALE 2020; 12:23732-23739. [PMID: 33231235 DOI: 10.1039/d0nr04591h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Vertical van der Waals heterostructures have aroused great attention for their promising application in next-generation nanoelectronic and optoelectronic devices. The dielectric screening effect plays a key role in the properties of two-dimensional (2D) heterostructures. Here, we studied the dielectric screening effects on the excitonic properties and critical points (CPs) of the WS2/MoS2 heterostructure using spectroscopic ellipsometry (SE). Owing to the type-II band alignment of the WS2/MoS2 heterostructure, charged carriers spatially separated and created an interlayer exciton, and the transition energy and binding energy have been accurately found to be 1.58 ± 0.050 eV and 431.39 ± 127.818 meV by SE, respectively. We found that stacking the WS2/MoS2 vertical heterostructure increases the effective dielectric screening compared with the monolayer counterparts. The increased effective dielectric screening in the WS2/MoS2 heterostructure weakens the long-range Coulomb force between electrons and holes. Consequently, the quasi-particle band gap and the exciton binding energies are reduced, and because of the orbital overlap, more CPs are produced in the WS2/MoS2 heterostructure in the high photon energy range. Our results not only shed light on the interpretation of recent first-principles studies, but also provide important physical support for improving the performance of heterostructure-based optoelectronic devices with tunable functionalities.
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Affiliation(s)
- Xudan Zhu
- Key Laboratory of Micro and Nano Photonic Structures, Ministry of Education, Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, School of Information Science and Engineering, Fudan University, Shanghai 200433, China.
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First principles study of structural, optoelectronic and photocatalytic properties of SnS, SnSe monolayers and their van der Waals heterostructure. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2020.110939] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Alrebdi TA, Amin B. Optoelectronic and photocatalytic applications of hBP-XMY (M = Mo, W; (X ≠ Y) = S, Se, Te) van der Waals heterostructures. Phys Chem Chem Phys 2020; 22:23028-23037. [PMID: 33047747 DOI: 10.1039/d0cp03926h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Stacking of layers via weak van der Waals interactions is an important technique for tuning the physical properties and designing viable electronic products. Using first-principles calculations, the geometry, electronic structure, and optical and photocatalytic performance of novel vdW heterostructures based on hexagonal boron phosphide (hBP) and Janus (XMY (M = Mo, W; (X ≠ Y) = S, Se, Te)) monolayers are investigated. Favorable (dynamically and energetically) stacking patterns of two different models of hBP-XMY heterostructures are presented with an alternative order of chalcogen atoms at opposite surfaces in SMSe. A direct type-II band alignment is obtained in both models of hBP-SMoSe, hBP-SWSe and hBP-SeWTe, while the rest are type-II indirect bandgap semiconductors. The Bader charge, and planer-averaged and plane-averaged charge density differences are investigated, which show that hBP donates electrons to the SMoSe and SWSe layer in the hBP-SMoSe and hBP-SWSe vdW heterostructure, while in the case of the hBP-SMoTe (hBP-SWTe) and hBP-SeMoTe (hBP-SeWTe) vdW heterostructures, the transfer of electrons is observed from SMoTe (SWTe) and SeMoTe (SeWTe) to hBP. The imaginary part of the dielectric function shows that the lowest energy transitions are dominated by excitons with a systematic red shift for heavier chalcogen atoms. Furthermore, the photocatalytic performance indicates that the hBP-XMY (M = Mo, W; (X ≠ Y) = S, Se, Te) vdW heterostructures in model-I are suitable for water splitting at pH = 0.
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Affiliation(s)
- Tahani A Alrebdi
- Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
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Abstract
Two-dimensional (2D) layered materials and their heterostructures have recently been recognized as promising building blocks for futuristic brain-like neuromorphic computing devices. They exhibit unique properties such as near-atomic thickness, dangling-bond-free surfaces, high mechanical robustness, and electrical/optical tunability. Such attributes unattainable with traditional electronic materials are particularly promising for high-performance artificial neurons and synapses, enabling energy-efficient operation, high integration density, and excellent scalability. In this review, diverse 2D materials explored for neuromorphic applications, including graphene, transition metal dichalcogenides, hexagonal boron nitride, and black phosphorous, are comprehensively overviewed. Their promise for neuromorphic applications are fully discussed in terms of material property suitability and device operation principles. Furthermore, up-to-date demonstrations of neuromorphic devices based on 2D materials or their heterostructures are presented. Lastly, the challenges associated with the successful implementation of 2D materials into large-scale devices and their material quality control will be outlined along with the future prospect of these emergent materials.
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Dai TJ, Chen YQ, Zhou ZY, Sun J, Peng XS, Liu XZ. Two-dimensional MoSe2/graphene heterostructure thin film with wafer-scale continuity via van der Waals epitaxy. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137762] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ketolainen T, Macháčová N, Karlický F. Optical Gaps and Excitonic Properties of 2D Materials by Hybrid Time-Dependent Density Functional Theory: Evidences for Monolayers and Prospects for van der Waals Heterostructures. J Chem Theory Comput 2020; 16:5876-5883. [DOI: 10.1021/acs.jctc.0c00387] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tomi Ketolainen
- Department of Physics, Faculty of Science, University of Ostrava, 30. Dubna 22, 701 03 Ostrava, Czech Republic
| | - Nikola Macháčová
- Department of Physics, Faculty of Science, University of Ostrava, 30. Dubna 22, 701 03 Ostrava, Czech Republic
- Grammar School Matičnı́, Dr. Šmerala 25/2565, 728 04 Ostrava, Czech Republic
| | - František Karlický
- Department of Physics, Faculty of Science, University of Ostrava, 30. Dubna 22, 701 03 Ostrava, Czech Republic
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Aftab S, Yousuf S, Khan MU, Khawar R, Younus A, Manzoor M, Iqbal MW, Iqbal MZ. Carrier polarity modulation of molybdenum ditelluride (MoTe 2) for phototransistor and switching photodiode applications. NANOSCALE 2020; 12:15687-15696. [PMID: 32672307 DOI: 10.1039/d0nr03904g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Two-dimensional (2D) transition-metal dichalcogenides (TMDs) are layered semiconductor materials that have recently emerged as promising candidates for advanced nano- and photoelectronic applications. Previously, various doping methods, such as surface functionalization, chemical doping, substitutional doping, surface charge transfer, and electrostatic doping, have been introduced, but they are not stable or efficient. In this study, we have developed carrier polarity modulation of molybdenum ditelluride (MoTe2) for the development of phototransistors and switching photodiodes. Initially, we treated p-MoTe2 in a N2 environment under DUV irradiation and found that the p-type MoTe2 changed to n-type MoTe2. However, the treated devices exhibited environmental stability over a long period of 60 days. Kelvin probe force microscopy (KPFM) measurements demonstrated that the values of the work function for p-MoTe2 and n-MoTe2 were ∼4.90 and ∼4.49 eV, respectively, which confirmed the carrier tunability. Also, first-principles studies were performed to confirm the n-type carrier polarity variation. Interestingly, the n-type MoTe2 reversed its polarity to p-type after the irradiation of the devices under DUV in an O2 environment. Additionally, a lateral homojunction-based p-n diode of MoTe2 with a rectification ratio of ∼2.5 × 104 was formed with the value of contact potential difference of ∼400 mV and an estimated fast rise time of 29 ms and decay time of 38 ms. Furthermore, a well self-biased photovoltaic behavior upon illumination of light was achieved and various photovoltaic parameters were examined. Also, VOC switching behavior was established at the p-n diode state by switching on and off the incident light. We believe that this efficient and facile carrier polarity modulation technique may pave the way for the development of phototransistors and switching photodiodes in advanced nanotechnology.
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Affiliation(s)
- Sikandar Aftab
- Department of Physics & Astronomy and Graphene Research Institute, Sejong University, Seoul 05006, Korea.
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Pan X, Jin T, Gao J, Han C, Shi Y, Chen W. Stimuli-Enabled Artificial Synapses for Neuromorphic Perception: Progress and Perspectives. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2001504. [PMID: 32734644 DOI: 10.1002/smll.202001504] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 05/27/2020] [Indexed: 06/11/2023]
Abstract
Brain-inspired neuromorphic computing is intended to provide effective emulation of the functionality of the human brain via the integration of electronic components. Recent studies of synaptic plasticity, which represents one of the most significant neurochemical bases of learning and memory, have enhanced the general comprehension of how the brain functions and have thereby eased the development of artificial neuromorphic devices. An understanding of the synaptic plasticity induced by various types of stimuli is essential for neuromorphic system construction. The realization of multiple stimuli-enabled synapses will be important for future neuromorphic computing applications. In this Review, state-of-the-art synaptic devices with particular emphasis on their synaptic behaviors under excitation by a variety of external stimuli are summarized, including electric fields, light, magnetic fields, pressure, and temperature. The switching mechanisms of these synaptic devices are discussed in detail, including ion migration, electron/hole transfer, phase transition, redox-based resistive switching, and other mechanisms. This Review aims to provide a comprehensive understanding of the operating mechanisms of artificial synapses and thus provides the principles required for design of multifunctional neuromorphic systems with parallel processing capabilities.
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Affiliation(s)
- Xuan Pan
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
| | - Tengyu Jin
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, 350207, P. R. China
| | - Jing Gao
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
| | - Cheng Han
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Yumeng Shi
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Wei Chen
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, 350207, P. R. China
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
- National University of Singapore (Suzhou) Research Institute, 377 Lin Quan Street, Suzhou Industrial Park, Jiangsu, 215123, China
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Device Architecture for Visible and Near-Infrared Photodetectors Based on Two-Dimensional SnSe 2 and MoS 2: A Review. MICROMACHINES 2020; 11:mi11080750. [PMID: 32751953 PMCID: PMC7465435 DOI: 10.3390/mi11080750] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/26/2020] [Accepted: 07/28/2020] [Indexed: 01/30/2023]
Abstract
While band gap and absorption coefficients are intrinsic properties of a material and determine its spectral range, response time is mainly controlled by the architecture of the device and electron/hole mobility. Further, 2D-layered materials such as transition metal dichalogenides (TMDCs) possess inherent and intriguing properties such as a layer-dependent band gap and are envisaged as alternative materials to replace conventional silicon (Si) and indium gallium arsenide (InGaAs) infrared photodetectors. The most researched 2D material is graphene with a response time between 50 and 100 ps and a responsivity of <10 mA/W across all wavelengths. Conventional Si photodiodes have a response time of about 50 ps with maximum responsivity of about 500 mA/W at 880 nm. Although the responsivity of TMDCs can reach beyond 104 A/W, response times fall short by 3–6 orders of magnitude compared to graphene, commercial Si, and InGaAs photodiodes. Slow response times limit their application in devices requiring high frequency. Here, we highlight some of the recent developments made with visible and near-infrared photodetectors based on two dimensional SnSe2 and MoS2 materials and their performance with the main emphasis on the role played by the mobility of the constituency semiconductors to response/recovery times associated with the hetero-structures.
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Liu N, Lu N, Yu H, Chen S, Quan X. Efficient day-night photocatalysis performance of 2D/2D Ti 3C 2/Porous g-C 3N 4 nanolayers composite and its application in the degradation of organic pollutants. CHEMOSPHERE 2020; 246:125760. [PMID: 31901663 DOI: 10.1016/j.chemosphere.2019.125760] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 12/02/2019] [Accepted: 12/25/2019] [Indexed: 06/10/2023]
Abstract
It is hindered by the limited light time that the development of photocatalysis technology, which is a clean and energy-saving advanced oxidation process. In this work, a 2D/2D Ti3C2/porous g-C3N4 nanolayers composited van der Waals (VDW) heterostructure photocatalyst (Ti3C2/PCN) was prepared by a straightforward vacuum filtration method after an ultrasonic stripping process. In this Ti3C2/PCN composite photocatalyst, PCN nanolayers play the role of absorbing visible light, while Ti3C2 nanolayers form VDW heterojunction with PCN nanolayers, which is beneficial to migration of photo-generated electrons from PCN to Ti3C2. The band structure match of Ti3C2/PCN and the build-in electric field from the VDW heterojunction both favor the effective separation and migration of photo-induced charge carriers that is why the Ti3C2/PCN composite shows good day-photocatalytic capability with 98% phenol removal efficiency. Besides, as a good electronic storage material, the Ti3C2 can store excess photo-generated electrons under light irradiation and release them when exposed to electron acceptors in the dark condition. Therefore, the night-photocatalysis can work out even without sunlight, in which 32% phenol was decomposed. In addition, the universality of Ti3C2/PCN day-night photocatalytic system is proved by the degradation of various organic pollutants. The design of this day-night photocatalyst can facilitate the application of photocatalytic reaction to actual environmental scenes, since it reduces the limitation imposed by the presence or absence of sunlight.
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Affiliation(s)
- Ning Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, PR China
| | - Na Lu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, PR China; School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, PR China.
| | - HongTao Yu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, PR China
| | - Shuo Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, PR China
| | - Xie Quan
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, PR China.
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Yan Y, Zhai D, Liu Y, Gong J, Chen J, Zan P, Zeng Z, Li S, Huang W, Chen P. van der Waals Heterojunction between a Bottom-Up Grown Doped Graphene Quantum Dot and Graphene for Photoelectrochemical Water Splitting. ACS NANO 2020; 14:1185-1195. [PMID: 31934740 DOI: 10.1021/acsnano.9b09554] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
van der Waals heterojunctions (vdWHs) formed between 2D materials have attracted tremendous attention recently due to their extraordinary properties, which cannot be offered by their individual components or other heterojunctions. Intriguing electronic coupling, lowered energy barrier, intimate charge transfer, and efficient exciton separation occurring at the atomically sharp interface promise their applications in catalysis, which, however, are largely unexplored. Herein, we demonstrate a 0D/2D vdWH between 0D graphene quantum dots (GQDs) and 2D pristine graphene sheets, simply prepared by ultrasonication of graphite powder using GQDs as intercalation surfactant. Such an all-carbon Schottky-diode-like 0D/2D vdWH is employed for the emerging photoelectrochemical catalysis (water splitting) with high performance. The demonstrated low-cost and scalable bottom-up growth of heteroatom-doped GQDs will greatly promote their widespread applications. Moreover, the mechanisms underlying GQD growth and heterojunction-mediated catalysis are revealed both experimentally and theoretically.
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Affiliation(s)
- Yibo Yan
- Shaanxi Institute of Flexible Electronics , Northwestern Polytechnical University , 127 West Youyi Road , Xi'an 710072 , People's Republic of China
- School of Chemical and Biomedical Engineering, Innovative Centre for Flexible Devices , Nanyang Technological University , 70 Nanyang Drive , Singapore , 637457 , Singapore
| | - Dong Zhai
- Materials Genome Institute (MGI), International Centre for Quantum and Molecular Structures (ICQMS), Department of Physics , Shanghai University , 333 Nanchen Road , Shanghai 200444 , People's Republic of China
- Institute of Molecular Sciences and Engineering , Shandong University , 72 Binhai Road , Qingdao 266237 , People's Republic of China
| | - Yi Liu
- Materials Genome Institute (MGI), International Centre for Quantum and Molecular Structures (ICQMS), Department of Physics , Shanghai University , 333 Nanchen Road , Shanghai 200444 , People's Republic of China
| | - Jun Gong
- School of Chemical and Biomedical Engineering, Innovative Centre for Flexible Devices , Nanyang Technological University , 70 Nanyang Drive , Singapore , 637457 , Singapore
| | - Jie Chen
- School of Chemical and Biomedical Engineering, Innovative Centre for Flexible Devices , Nanyang Technological University , 70 Nanyang Drive , Singapore , 637457 , Singapore
| | - Ping Zan
- School of Chemical and Biomedical Engineering, Innovative Centre for Flexible Devices , Nanyang Technological University , 70 Nanyang Drive , Singapore , 637457 , Singapore
| | - Zhiping Zeng
- School of Chemical and Biomedical Engineering, Innovative Centre for Flexible Devices , Nanyang Technological University , 70 Nanyang Drive , Singapore , 637457 , Singapore
| | - Shuzhou Li
- School of Materials Science and Engineering , Nanyang Technological University , Singapore , 639798 , Singapore
| | - Wei Huang
- Shaanxi Institute of Flexible Electronics , Northwestern Polytechnical University , 127 West Youyi Road , Xi'an 710072 , People's Republic of China
| | - Peng Chen
- School of Chemical and Biomedical Engineering, Innovative Centre for Flexible Devices , Nanyang Technological University , 70 Nanyang Drive , Singapore , 637457 , Singapore
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Ren K, Luo Y, Yu J, Tang W. Theoretical prediction of two-dimensional ZnO/GaN van der Waals heterostructure as a photocatalyst for water splitting. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2019.110539] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Duarte de Vargas D, Baierle RJ. Tunable spin-polarized band gap in Si2/NiI2 vdW heterostructure. RSC Adv 2020; 10:8927-8935. [PMID: 35496562 PMCID: PMC9050046 DOI: 10.1039/c9ra10199c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 02/07/2020] [Indexed: 12/23/2022] Open
Abstract
Using density functional theory (DFT) calculations we investigate the structural and electronic properties of a heterogeneous van der Waals (vdW) structure consisting of silicene and NiI2 single layers. We observe an interaction between the two layers with a net charge transfer from the ferromagnetic semiconductor NiI2 to silicene, breaking the inversion symmetry of the silicene structure. However, the charges flow in opposite directions for the two spin channels, which leads to a vdW heterostructure with a spin-polarized band gap between the π and π* states. The band gap can be tuned by controlling the vertical distance between the layers. The features shown by this vdW heterostructure are new, and we believe that silicene on a NiI2 layer can be used to construct heterostructures which have appropriate properties to be used in nanodevices where control of the spin-dependent carrier mobility is necessary and can be incorporated into silicon based electronics. Using density functional theory (DFT) calculations we investigate the structural and electronic properties of a heterogeneous van der Waals (vdW) structure consisting of silicene and NiI2 single layers.![]()
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42
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Li XH, Wang BJ, Li H, Yang XF, Zhao RQ, Jia XT, Ke SH. Two-dimensional layered Janus-In2SeTe/C2N van der Waals heterostructures for photocatalysis and photovoltaics: first-principles calculations. NEW J CHEM 2020. [DOI: 10.1039/d0nj03296d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Through DFT calculations, Janus-In2SeTe/C2N heterostructures are found to have great potential applications in the fields of clean and sustainable energy.
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Affiliation(s)
- Xiao-Hua Li
- School of Physics and Electronic Information Engineering
- Henan Polytechnic University
- Jiaozuo 454000
- China
| | - Bao-Ji Wang
- School of Physics and Electronic Information Engineering
- Henan Polytechnic University
- Jiaozuo 454000
- China
| | - Hui Li
- School of Physics and Electronic Information Engineering
- Henan Polytechnic University
- Jiaozuo 454000
- China
| | - Xue-Feng Yang
- School of Physics and Electronic Information Engineering
- Henan Polytechnic University
- Jiaozuo 454000
- China
| | - Rui-Qi Zhao
- School of Materials Science and Engineering
- Henan Polytechnic University
- Jiaozuo 454000
- China
| | - Xing-Tao Jia
- School of Physics and Electronic Information Engineering
- Henan Polytechnic University
- Jiaozuo 454000
- China
| | - San-Huang Ke
- MOE Key Labortoray of Microstructured Materials
- School of Physics Science and Engineering
- Tongji University
- Shanghai
- China
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43
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Chen F, Yao Y, Su W, Ding S, Fu L. Optical performance and growth mechanism of a 2D WS2–MoWS2 hybrid heterostructure fabricated by a one-step CVD strategy. CrystEngComm 2020. [DOI: 10.1039/c9ce01652j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A large-scale 2D WS2-Mo1−xWxS2 hybrid heterostructure can be realized by the reaction of S powder and sputtered Mo/W films through the chemical vapor deposition method.
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Affiliation(s)
- Fei Chen
- College of Materials and Environmental Engineering
- Hangzhou Dianzi University
- Hangzhou
- China
| | - Yi Yao
- College of Materials and Environmental Engineering
- Hangzhou Dianzi University
- Hangzhou
- China
| | - Weitao Su
- School of Sciences
- Hangzhou Dianzi University
- Hangzhou
- China
| | - Su Ding
- College of Materials and Environmental Engineering
- Hangzhou Dianzi University
- Hangzhou
- China
| | - Li Fu
- College of Materials and Environmental Engineering
- Hangzhou Dianzi University
- Hangzhou
- China
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44
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Tan A, Zhang P. Tailoring the growth and electronic structures of organic molecular thin films. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:503001. [PMID: 31422957 DOI: 10.1088/1361-648x/ab3c22] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In the rapidly developing electronics industry, it has become increasingly necessary to explore materials that are cheap, flexible and versatile which have led to significant research efforts towards organic molecular thin films. Organic molecules are unique compared to their inorganic atomic counterparts as their properties can be tuned drastically through chemical functionalization, offering versatility, though their extended shape and weak intermolecular interactions bring significant challenges to the control of both the growth and the electronic structures of molecular thin films. In this paper, we will review the self-assembly process and how to establish long-range ordered organic molecular thin films. We will also discuss how the electronic structures of thin films are impacted by the molecule's local electrostatic environment and its interaction with the substrate, within the context of controlling interfacial energy level alignment between organic semiconductors and electrodes in electronic devices.
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Affiliation(s)
- Andrew Tan
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, United States of America
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45
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Xu H, Guo C, Zhang J, Guo W, Kuo CN, Lue CS, Hu W, Wang L, Chen G, Politano A, Chen X, Lu W. PtTe 2 -Based Type-II Dirac Semimetal and Its van der Waals Heterostructure for Sensitive Room Temperature Terahertz Photodetection. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1903362. [PMID: 31736239 DOI: 10.1002/smll.201903362] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 10/23/2019] [Indexed: 05/15/2023]
Abstract
Recent years have witnessed rapid progresses made in the photoelectric performance of two-dimensional materials represented by graphene, black phosphorus, and transition metal dichalcogenides. Despite significant efforts, a photodetection technique capable for longer wavelength, higher working temperature as well as fast responsivity, is still facing huge challenges due to a lack of best among bandgap, dark current, and absorption ability. Exploring topological materials with nontrivial band transport leads to peculiar properties of quantized phenomena such as chiral anomaly, and magnetic-optical effect, which enables a novel feasibility for an advanced optoelectronic device working at longer wavelength. In this work, the direct generation of photocurrent at low energy terahertz (THz) band at room temperature is implemented in a planar metal-PtTe2 -metal structure. The results show that the THz photodetector based on PtTe2 with bow-tie-type planar contacts possesses a high photoresponsivity (1.6 A W-1 without bias voltage) with a response time less than 20 µs, while the PtTe2 -graphene heterostructure-based detector can reach responsivity above 1.4 kV W-1 and a response time shorter than 9 µs. Remarkably, it is already exploitable for large area imaging applications. These results suggest that topological semimetals such as PtTe2 can be ideal materials for implementation in a high-performing photodetection system at THz band.
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Affiliation(s)
- Huang Xu
- State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu-tian Road, Shanghai, 200083, China
| | - Cheng Guo
- State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu-tian Road, Shanghai, 200083, China
| | - Jiazhen Zhang
- State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu-tian Road, Shanghai, 200083, China
| | - Wanlong Guo
- State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu-tian Road, Shanghai, 200083, China
| | - Chia-Nung Kuo
- Department of Physics, National Cheng Kung University, 1 Ta-Hsueh Road, Tainan, 70101, Taiwan
| | - Chin Shan Lue
- Department of Physics, National Cheng Kung University, 1 Ta-Hsueh Road, Tainan, 70101, Taiwan
| | - Weida Hu
- State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu-tian Road, Shanghai, 200083, China
| | - Lin Wang
- State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu-tian Road, Shanghai, 200083, China
| | - Gang Chen
- State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu-tian Road, Shanghai, 200083, China
| | - Antonio Politano
- Department of Physical and Chemical Sciences, University of L'Aquila, via Vetoio, L'Aquila (AQ), 67100, Italy
- CNR-IMM Istituto per la Microelettronica e Microsistemi, Chinese Academy of Sciences, VIII strada 5, Catania, I-95121, Italy
| | - Xiaoshuang Chen
- State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu-tian Road, Shanghai, 200083, China
| | - Wei Lu
- State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu-tian Road, Shanghai, 200083, China
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46
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Liu X, Zhang Z, Luo Z, Lv B, Ding Z. Tunable Electronic Properties of Graphene/g-AlN Heterostructure: The Effect of Vacancy and Strain Engineering. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E1674. [PMID: 31771190 PMCID: PMC6956148 DOI: 10.3390/nano9121674] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 11/17/2019] [Accepted: 11/20/2019] [Indexed: 11/16/2022]
Abstract
The structural and electronic properties of graphene/graphene-like Aluminum Nitrides monolayer (Gr/g-AlN) heterojunction with and without vacancies are systematically investigated by first-principles calculation. The results prove that Gr/g-AlN with nitrogen-vacancy (Gr/g-AlN-VN) is energy favorable with the smallest sublayer distance and binding energy. Gr/g-AlN-VN is nonmagnetic, like that in the pristine Gr/g-AlN structure, but it is different from the situation of g-AlN-VN, where a magnetic moment of 1 μB is observed. The metallic graphene acts as an electron acceptor in the Gr/g-AlN-VN and donor in Gr/g-AlN and Gr/g-AlN-VAl contacts. Schottky barrier height Φ B , n by traditional (hybrid) functional of Gr/g-AlN, Gr/g-AlN-VAl, and Gr/g-AlN-VN are calculated as 2.35 (3.69), 2.77 (3.23), and 1.10 (0.98) eV, respectively, showing that vacancies can effectively modulate the Schottky barrier height. Additionally, the biaxial strain engineering is conducted to modulate the heterojunction contact properties. The pristine Gr/g-AlN, which is a p-type Schottky contact under strain-free condition, would transform to an n-type contact when 10% compressive strain is applied. Ohmic contact is formed under a larger tensile strain. Furthermore, 7.5% tensile strain would tune the Gr/g-AlN-VN from n-type to p-type contact. These plentiful tunable natures would provide valuable guidance in fabricating nanoelectronics devices based on Gr/g-AlN heterojunctions.
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Affiliation(s)
- Xuefei Liu
- College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, China;
- Semiconductor Power Device Reliability Engineering Center of Ministry of Education, Guiyang 550025, China;
- Key Laboratory of Low Dimensional Condensed Matter Physics of Higher Educational Institution of Guizhou Province, School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550025, China;
| | - Zhaofu Zhang
- Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, UK
| | - Zijiang Luo
- Semiconductor Power Device Reliability Engineering Center of Ministry of Education, Guiyang 550025, China;
- College of Information, Guizhou Finance and Economics University, Guiyang 550025, China
| | - Bing Lv
- Key Laboratory of Low Dimensional Condensed Matter Physics of Higher Educational Institution of Guizhou Province, School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550025, China;
| | - Zhao Ding
- College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, China;
- Semiconductor Power Device Reliability Engineering Center of Ministry of Education, Guiyang 550025, China;
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47
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Wu J, Qiu C, Feng S, Yao T, Yan Y, Lin S. A synergetic enhancement of localized surface plasmon resonance and photo-induced effect for graphene/GaAs photodetector. NANOTECHNOLOGY 2019; 31:105204. [PMID: 31751950 DOI: 10.1088/1361-6528/ab5a08] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Photodetectors based on graphene/GaAs heterostructure were fabricated and demonstrated for application in self-powered photodetection. Then, Si quantum dots (QDs) were spin-coated onto the surface of the devices to enhance the built-in field by photo-induced doping, because of the tunable Fermi level (E F) of graphene and shallow junction of the heterojunction. Additionally, Au nanoparticles working as a light trapping structure were used to the enhance quantum efficiency of the Si QDs and the optical absorption of the heterojunction, benefitting from localized surface plasmon resonance. Therefore, a large-area photodetector under self-powered conditions achieved a high performance i.e. responsivity (1.81 × 105 V W-1), detectivity (2.0 × 1012 Jones), fast response speed (<0.04 ms), and on-off ratio (6 × 103). The high voltage responsivity opens a promising pathway to ultra-weak light detection, and facilities the development of novel sensors.
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Affiliation(s)
- Jianghong Wu
- College of Microelectronics, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
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48
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Sumesh CK, Peter SC. Two-dimensional semiconductor transition metal based chalcogenide based heterostructures for water splitting applications. Dalton Trans 2019; 48:12772-12802. [DOI: 10.1039/c9dt01581g] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent research and development is focused in an intensive manner to increase the efficiency of solar energy conversion into electrical energy via photovoltaics and photo-electrochemical reactions.
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Affiliation(s)
- C. K. Sumesh
- Department of Physical Sciences
- P. D. Patel Institute of Applied Sciences
- Charotar University of Science and Technology (CHARUSAT)
- Changa-388421
- India
| | - Sebastian C. Peter
- New Chemistry Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research
- Bengaluru 560064
- India
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49
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Huo N, Konstantatos G. Recent Progress and Future Prospects of 2D-Based Photodetectors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1801164. [PMID: 30066409 DOI: 10.1002/adma.201801164] [Citation(s) in RCA: 145] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 05/10/2018] [Indexed: 06/08/2023]
Abstract
Conventional semiconductors such as silicon- and indium gallium arsenide (InGaAs)-based photodetectors have encountered a bottleneck in modern electronics and photonics in terms of spectral coverage, low resolution, nontransparency, nonflexibility, and complementary metal-oxide-semiconductor (CMOS) incompatibility. New emerging two-dimensional (2D) materials such as graphene, transition metal dichalcogenides (TMDs), and their hybrid systems thereof, however, can circumvent all these issues benefitting from mechanically flexibility, extraordinary electronic and optical properties, as well as wafer-scale production and integration. Heterojunction-based photodiodes based on 2D materials offer ultrafast and broadband response from the visible to far-infrared range. Phototransistors based on 2D hybrid systems combined with other material platforms such as quantum dots, perovskites, organic materials, or plasmonic nanostructures yield ultrasensitive and broadband light-detection capabilities. Notably the facile integration of 2D photodetectors on silicon photonics or CMOS platforms paves the way toward high-performance, low-cost, broadband sensing and imaging modalities.
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Affiliation(s)
- Nengjie Huo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, 08860, Barcelona, Spain
| | - Gerasimos Konstantatos
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, 08860, Barcelona, Spain
- ICREA-Institució Catalana de Recerca i Estudis Avançats, Lluis Companys 23, 08010, Barcelona, Spain
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50
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Stergiou A, Tagmatarchis N. Molecular Functionalization of Two‐Dimensional MoS
2
Nanosheets. Chemistry 2018; 24:18246-18257. [DOI: 10.1002/chem.201803066] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Anastasios Stergiou
- Theoretical and Physical Chemistry InstituteNational Hellenic Research Foundation 48 Vassileos Constantinou Avenue Athens 11635 Greece
| | - Nikos Tagmatarchis
- Theoretical and Physical Chemistry InstituteNational Hellenic Research Foundation 48 Vassileos Constantinou Avenue Athens 11635 Greece
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