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Wang R, Chen Q, Liu X, Hu Y, Cao L, Dong B. Synergistic Effects of Dual-Doping with Ni and Ru in Monolayer VS 2 Nanosheet: Unleashing Enhanced Performance for Acidic HER through Defects and Strain. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2311217. [PMID: 38396321 DOI: 10.1002/smll.202311217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 02/04/2024] [Indexed: 02/25/2024]
Abstract
Amidst the escalating quest for clean energy, the hydrogen evolution reaction (HER) in acidic conditions has taken center stage, catalyzing the search for advanced electrocatalysts. The efficacy of these materials is predominantly dictated by the active site density on their surfaces. The propensity is leveraged for monolayer architectures to introduce defects, enhancing surface area, and increasing active sites. Doping enhances defects and fine-tunes catalyst activity. In this vein, defect-enriched monolayer nanosheets doped with nickel and a trace amount of ruthenium in VS2 (SL-Ni-Ru-VS2 ) are engineered and characterized. Evaluation in 0.5 m H2 SO4 solution unveils that the catalyst achieves overpotentials as low as 20 and 41 mV at current densities of -10 and -100 mA cm⁻2 . Impressively, the catalyst maintains a mass activity of 13.08 A mg⁻¹Ru , even with minimal Ru incorporation, indicating exceptional catalytic efficiency. This monolayer catalyst sustains its high activity at lower overpotentials, demonstrating its practical applicability. The comprehensive analysis, which combines experimental data and computational simulations, indicates that the co-doping of Ni and Ru enhances the electrocatalytic properties of VS2 . This research offers a strategic framework for crafting cutting-edge electrocatalysts specifically designed for enhanced performance in the HER.
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Affiliation(s)
- Ruonan Wang
- School of Materials Science and Engineering, Ocean University of China, 1299 Sansha Road, Qingdao, Shandong Province, 266100, P. R. China
| | - Qian Chen
- School of Materials Science and Engineering, Ocean University of China, 1299 Sansha Road, Qingdao, Shandong Province, 266100, P. R. China
| | - Xinzheng Liu
- School of Materials Science and Engineering, Ocean University of China, 1299 Sansha Road, Qingdao, Shandong Province, 266100, P. R. China
| | - Yubin Hu
- Marine Science and Technology, Shandong University, 72 Coastal Highway, Qingdao, 266237, P. R. China
| | - Lixin Cao
- School of Materials Science and Engineering, Ocean University of China, 1299 Sansha Road, Qingdao, Shandong Province, 266100, P. R. China
| | - Bohua Dong
- School of Materials Science and Engineering, Ocean University of China, 1299 Sansha Road, Qingdao, Shandong Province, 266100, P. R. China
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Kim J, Rhee D, Jung M, Cheon GJ, Kim K, Kim JH, Park JY, Yoon J, Lim DU, Cho JH, Kim IS, Son D, Jariwala D, Kang J. Defect-Engineered Semiconducting van der Waals Thin Film at Metal-Semiconductor Interface of Field-Effect Transistors. ACS NANO 2024; 18:1073-1083. [PMID: 38100089 DOI: 10.1021/acsnano.3c10453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
The significance of metal-semiconductor interfaces and their impact on electronic device performance have gained increasing attention, with a particular focus on investigating the contact metal. However, another avenue of exploration involves substituting the contact metal at the metal-semiconductor interface of field-effect transistors with semiconducting layers to introduce additional functionalities to the devices. Here, a scalable approach for fabricating metal-oxide-semiconductor (channel)-semiconductor (interfacial layer) field-effect transistors is proposed by utilizing solution-processed semiconductors, specifically semiconducting single-walled carbon nanotubes and molybdenum disulfide, as the channel and interfacial semiconducting layers, respectively. The work function of the interfacial MoS2 is modulated by controlling the sulfur vacancy concentration through chemical treatment, which results in distinctive energy band alignments within a single device configuration. The resulting band alignments lead to multiple functionalities, including multivalued transistor characteristics and multibit nonvolatile memory (NVM) behavior. Moreover, leveraging the stable NVM properties, we demonstrate artificial synaptic devices with 88.9% accuracy of MNIST image recognition.
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Affiliation(s)
- Jihyun Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Dongjoon Rhee
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
- Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Myeongjin Jung
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
- Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Gang Jin Cheon
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Kangsan Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Jae Hyung Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Ji Yun Park
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Jiyong Yoon
- Department of Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Dong Un Lim
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Jeong Ho Cho
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - In Soo Kim
- Nanophotonics Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- KIST-SKKU Carbon-Neutral Research Center, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Donghee Son
- Department of Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
- Nanophotonics Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- KIST-SKKU Carbon-Neutral Research Center, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Deep Jariwala
- Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Joohoon Kang
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
- Nanophotonics Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- KIST-SKKU Carbon-Neutral Research Center, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
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3
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Yilmaz E, Yavuz E. Use of transition metal dichalcogenides (TMDs) in analytical sample preparation applications. Talanta 2024; 266:125086. [PMID: 37633038 DOI: 10.1016/j.talanta.2023.125086] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 08/10/2023] [Accepted: 08/15/2023] [Indexed: 08/28/2023]
Abstract
Since the discovery of graphene, nano-sized two-dimensional (2D) transition metal dichalcogenides (TMDs) such as MoS2, MoSe2, MoTe2, NbS2, NbSe2, WS2, WSe2, TaS2 and TaSe2, which have been classified as next-generation nanomaterials resembling graphene (G) have complementary basic properties with those of graphene in terms of their practical applications. TMDs are attracting great attention due to their attractive physical, chemical and electronic properties. Despite being overshadowed by graphene in terms of frequency of use, TMDs have been used frequently in many areas in recent years instead of carbon-based materials such as graphene (G), graphene oxide (GO), carbon nanotubes (CNTs) and nanodiamonds (NDs). It is seen that the first and frequent uses of TMDs, which are classified as new generation materials, are in the fields of catalysis, electronic applications, hydrogen production processes and energy storage, but it has been used as an adsorbent in sample preparation techniques in recent years. Similar to graphene, layers of TMDs are held together by weak van der Waals interactions. The sandwiched layers of TMDs provide sufficient and effective interlayer spaces so that foreign molecules, ions and atoms can easily enter these spaces between the layers. Intermolecular interactions increase with the entry of different materials into these spaces, and thus, high activity, adsorption capacity and efficiency are obtained in adsorption-based analytical sample preparation methods. Although there are about 35 research articles using TMDs, which are classified as promising materials in analytical sample preparation techniques, no review studies have been found. This review, which was designed with this awareness, contains important informations on the properties of metal dichalcogenides, their production methods and their use in analytical sample preparation techniques.
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Affiliation(s)
- Erkan Yilmaz
- Technology Research & Application Center (TAUM), Erciyes University, 38039, Kayseri, Turkey; ERNAM-Erciyes University, Nanotechnology Application and Research Center, 38039, Kayseri, Turkey; Erciyes University, Faculty of Pharmacy, Department of Analytical Chemistry, 38039, Kayseri, Turkey; ChemicaMed Chemical Inc., Erciyes University Technology Development Zone, 38039 Kayseri, Turkey.
| | - Emre Yavuz
- Erzincan Binali Yildirim University, Cayirli Vocational School, Department of Medical Services and Technicians, 24503, Erzincan, Turkey.
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Kim J, Im C, Lee C, Hwang J, Jang H, Lee JH, Jin M, Lee H, Kim J, Sung J, Kim YS, Lee E. Solvent-assisted sulfur vacancy engineering method in MoS 2 for a neuromorphic synaptic memristor. NANOSCALE HORIZONS 2023; 8:1417-1427. [PMID: 37538027 DOI: 10.1039/d3nh00201b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Recently, two-dimensional transition metal dichalcogenides (TMDs) such as molybdenum disulfide (MoS2) have attracted great attention due to their unique properties. To modulate the electronic properties and structure of TMDs, it is crucial to precisely control chalcogenide vacancies and several methods have already been suggested. However, they have several limitations such as plasma damage by ion bombardment. Herein, we introduced a novel solvent-assisted vacancy engineering (SAVE) method to modulate sulfur vacancies in MoS2. Considering polarity and the Hansen solubility parameter (HSP), three solvents were selected. Sulfur vacancies can be modulated by immersing MoS2 in each solvent, supported by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy analyses. The SAVE method can further expand its application in memory devices representing memristive performance and synaptic behaviors. We represented the charge transport mechanism of sulfur vacancy migration in MoS2. The non-destructive, scalable, and novel SAVE method controlling sulfur vacancies is expected to be a guideline for constructing a vacancy engineering system of TMDs.
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Affiliation(s)
- Jiyeon Kim
- Department of Applied Bioengineering, Graduate School of Convergence Science and Technology, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea.
| | - Changik Im
- Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Chan Lee
- Department of Chemical and Biological Engineering, College of Engineering, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Jinwoo Hwang
- Department of Chemical Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi-si, Gyeongsangbuk-do, 39177, Republic of Korea.
| | - Hyoik Jang
- Department of Chemical Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi-si, Gyeongsangbuk-do, 39177, Republic of Korea.
| | - Jae Hak Lee
- Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, Republic of Korea
- Samsung Display Company, Ltd., 1 Samsung-ro, Giheung-gu, Yongin-si, Gyeonggi-do, 17113, Republic of Korea
| | - Minho Jin
- Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Haeyeon Lee
- Department of Chemical and Biological Engineering, College of Engineering, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Junyoung Kim
- Inspection Business Unit (IBU), Onto Innovation, 4900 W 78th St, Bloomington, MN 55435, USA
| | - Junho Sung
- Department of Chemical Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi-si, Gyeongsangbuk-do, 39177, Republic of Korea.
| | - Youn Sang Kim
- Department of Applied Bioengineering, Graduate School of Convergence Science and Technology, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea.
- Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, Republic of Korea
- Department of Chemical and Biological Engineering, College of Engineering, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, Republic of Korea
- Advanced Institutes of Convergence Technology, Gwanggyo-ro 145, Yeongtong-gu, Suwon, 16229, Republic of Korea
| | - Eunho Lee
- Department of Chemical Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi-si, Gyeongsangbuk-do, 39177, Republic of Korea.
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Ren H, Xiang G. Recent Progress in Research on Ferromagnetic Rhenium Disulfide. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3451. [PMID: 36234579 PMCID: PMC9565357 DOI: 10.3390/nano12193451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 09/26/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Since long-range magnetic ordering was observed in pristine Cr2Ge2Te6 and monolayer CrCl3, two-dimensional (2D) magnetic materials have gradually become an emerging field of interest. However, it is challenging to induce and modulate magnetism in non-magnetic (NM) materials such as rhenium disulfide (ReS2). Theoretical research shows that defects, doping, strain, particular phase, and domain engineering may facilitate the creation of magnetic ordering in the ReS2 system. These predictions have, to a large extent, stimulated experimental efforts in the field. Herein, we summarize the recent progress on ferromagnetism (FM) in ReS2. We compare the proposed methods to introduce and modulate magnetism in ReS2, some of which have made great experimental breakthroughs. Experimentally, only a few ReS2 materials exhibit room-temperature long-range ferromagnetic order. In addition, the superexchange interaction may cause weak ferromagnetic coupling between neighboring trimers. We also present a few potential research directions for the future, and we finally conclude that a deep and thorough understanding of the origin of FM with and without strain is very important for the development of basic research and practical applications.
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Affiliation(s)
- Hongtao Ren
- School of Materials Science and Engineering, Liaocheng University, Hunan Road No. 1, Liaocheng 252000, China
| | - Gang Xiang
- College of Physics, Sichuan University, Wangjiang Road No. 29, Chengdu 610064, China
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6
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Zhang X, Hua S, Lai L, Wang Z, Liao T, He L, Tang H, Wan X. Strategies to improve electrocatalytic performance of MoS 2-based catalysts for hydrogen evolution reactions. RSC Adv 2022; 12:17959-17983. [PMID: 35765324 PMCID: PMC9204562 DOI: 10.1039/d2ra03066g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 06/13/2022] [Indexed: 02/01/2023] Open
Abstract
Electrocatalytic hydrogen evolution reactions (HERs) are a key process for hydrogen production for clean energy applications. HERs have unique advantages in terms of energy efficiency and product separation compared to other methods. Molybdenum disulfide (MoS2) has attracted extensive attention as a potential HER catalyst because of its high electrocatalytic activity. However, the HER performance of MoS2 needs to be improved to make it competitive with conventional Pt-based catalysts. Herein, we summarize three typical strategies for promoting the HER performance, i.e., defect engineering, heterostructure formation, and heteroatom doping. We also summarize the computational density functional theory (DFT) methods used to obtain insight that can guide the construction of MoS2-based materials. Additionally, the challenges and prospects of MoS2-based catalysts for the HER have also been discussed. In this review, we summarize three general classes of effective strategies to enhance the HER activity of MoS2 and DFT calculation methods, i.e. defect engineering, heterostructure formation, and heteroatom doping.![]()
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Affiliation(s)
- Xinglong Zhang
- School of Materials and Energy, University of Electronic Science and Technology of China Chengdu 611731 P. R. China
| | - Shiying Hua
- Wuhan Institute of Marine Electric Propulsion Wuhan 430064 P. R. China
| | - Long Lai
- School of Materials and Energy, University of Electronic Science and Technology of China Chengdu 611731 P. R. China
| | - Zihao Wang
- School of Materials and Energy, University of Electronic Science and Technology of China Chengdu 611731 P. R. China
| | - Tiaohao Liao
- School of Materials and Energy, University of Electronic Science and Technology of China Chengdu 611731 P. R. China
| | - Liang He
- School of Mechanical Engineering, Sichuan University Chengdu 610065 P. R. China
| | - Hui Tang
- School of Materials and Energy, University of Electronic Science and Technology of China Chengdu 611731 P. R. China
| | - Xinming Wan
- China Automotive Engineering Research Institute Co., Ltd. Chongqing 401122 P. R. China
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7
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Shi J, Chen T, Sun X. The effect of heteroatom doping on the active metal site of CoS 2 for hydrogen evolution reaction. RSC Adv 2022; 12:17257-17263. [PMID: 35765429 PMCID: PMC9186305 DOI: 10.1039/d2ra01865a] [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: 03/23/2022] [Accepted: 06/01/2022] [Indexed: 11/21/2022] Open
Abstract
The exploration of cost-effective hydrogen evolution reaction (HER) electrocatalysts through water splitting is important for developing clean energy technology and devices. The application of CoS2 in HER has been drawing more and more attention due to its low cost and relatively satisfactory HER catalytic performance. And CoS2 was found to exhibit excellent HER catalytic performance after appropriate doping according to other experimental investigations. However, the theoretical simulation and the intrinsic catalytic mechanism of CoS2 remains insufficiently investigated. Therefore, in this study, density functional theory is used to investigate the HER catalytic activity of CoS2 doped with a heteroatom. The results show that Pt-, N- and O-doped CoS2 demonstrates smaller Gibbs free energies close to that of Pt, compared with the original CoS2 and CoS2 doped with other atoms. Furthermore, HER catalytic performance of CoS2 can be improved by tuning d-band centers of H adsorption sites. This study provides an effective method to achieve modified CoS2 for high-performance HER and to investigate other transition metal sulfides as HER electrode. The linear relationship between ΔGH* and d-band centers of H adsorption sites.![]()
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Affiliation(s)
- Jianjian Shi
- School of Electronic Engineering, Chengdu Technological University Chengdu 611730 PR China
| | - Tao Chen
- School of Electronic Engineering, Chengdu Technological University Chengdu 611730 PR China
| | - Xiaoli Sun
- Department of Energy and Power Engineering, Tsinghua University Beijing 100084 P. R. China .,Beijing Graphene Institute Beijing 100095 P. R. China
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Ippolito S, Samorì P. Defect Engineering Strategies Toward Controlled Functionalization of Solution‐Processed Transition Metal Dichalcogenides. SMALL SCIENCE 2022. [DOI: 10.1002/smsc.202100122] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- Stefano Ippolito
- CNRS ISIS UMR 7006 University of Strasbourg 8 Allée Gaspard Monge 67000 Strasbourg France
| | - Paolo Samorì
- CNRS ISIS UMR 7006 University of Strasbourg 8 Allée Gaspard Monge 67000 Strasbourg France
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Liu Y, Liu Y, Zhou H, Yang Z, Qu Y, Tan Y, Chen F. Defect Engineering of Out-of-Plane Charge Transport in van der Waals Heterostructures for Bi-Direction Photoresponse. ACS NANO 2021; 15:16572-16580. [PMID: 34550681 DOI: 10.1021/acsnano.1c06238] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Defects are ubiquitous in two-dimensional (2D) transition-metal dichalcogenides (TMDs), generated by the initial growth- or the postprocessing. However, the defects may play negative roles in the photoelectronic properties of TMDs due to the reduction of in-plane transport of carriers. In this work, we demonstrate that the Se-vacancy defects in MoSe2 side of the van der Waal heterostructure is able to switch direction of out-of-plane charge transport. Photoresponse spectra showed defect density enable modified surface potential of MoSe2-x, leading to the barrier reverse between graphene and MoSe2-x and switches of the photoresponse from the negative to the positive. This unexpected property stemmed from appearance of midgap states by defects at heterostructure, as demonstrated by the density functional theory calculation and scanning tunneling microscope results. MoSe2-0.2/graphene heterostructure has a broadband response ranging from 450 to 1064 nm and exhibits comparable or higher positive responsivity (5.4 × 103 A/W to -15.3 × 103 A/W at 632.8 and 5.7 × 103 A/W to -1.2 × 103 A/W at 1064 nm) to the negative one of the pristine MoSe2/graphene. Based on defect-engineered heterostructures, we construct optoelectronic OR and AND logic devices with a broadband operation. Our work elucidates an alternative avenue to tailor the out-of-plane charge transport in TMD-based heterostructure through defects, and potentially invokes applicable utilization for 2D photodetectors and optoelectronic logic gates.
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Affiliation(s)
- Yanran Liu
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
| | - Yue Liu
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
| | - Hua Zhou
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
| | - Zaixing Yang
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
| | - Yuanyuan Qu
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
| | - Yang Tan
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
| | - Feng Chen
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
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Kim J, Kim S, Cho YS, Choi M, Jung SH, Cho JH, Whang D, Kang J. Solution-Processed MoS 2 Film with Functional Interfaces via Precursor-Assisted Chemical Welding. ACS APPLIED MATERIALS & INTERFACES 2021; 13:12221-12229. [PMID: 33657809 DOI: 10.1021/acsami.1c00159] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Molybdenum disulfide (MoS2) presents fascinating properties for next-generation applications in diverse fields. However, fully exploiting the best properties of MoS2 in largescale practical applications still remains a challenge due to lack of proper processing methods. Solution-based processing can be a promising route for scalable production of MoS2 nanosheets, but the resulting assembled film possesses an enormous number of interfaces that significantly compromise the intrinsic electrical properties. Herein, we demonstrate the solution processing of MoS2 and subsequent precursor-assisted chemical welding to form defective MoS2-x at the nanosheet interfaces. The formation of defective MoS2-x significantly reduces the electrical contact resistances, and thus the chemically welded MoS2 film exhibits more than 2 orders of magnitude improved electrical conductivity. Furthermore, the chemical welding provides MoS2-x interface induced additional defect originated functionalities for diverse applications such as broadband photodetection over the near-infrared range and improved electrocatalytic activity for hydrogen evolution reactions. Overall, this precursor-assisted chemical welding strategy can be a facile route to produce high-quality MoS2 films with low-quality defective MoS2-x at the interfaces having multifunctionalities in electronics, optoelectronics, and electrocatalysis.
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Affiliation(s)
- Jihyun Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Seongchan Kim
- SKKU Advanced Institute of Nanotechnology (SAINT), Suwon 16419, Republic of Korea
| | - Yun Seong Cho
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Minseok Choi
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Su-Ho Jung
- SKKU Advanced Institute of Nanotechnology (SAINT), Suwon 16419, Republic of Korea
| | - Jeong Ho Cho
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Dongmok Whang
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
- SKKU Advanced Institute of Nanotechnology (SAINT), Suwon 16419, Republic of Korea
| | - Joohoon Kang
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
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