Article
Chemistry, Multidisciplinary
Daniel Vaquero, Vito Clerico, Juan Salvador-Sanchez, Elena Diaz, Francisco Dominguez-Adame, Leonor Chico, Yahya M. Meziani, Enrique Diez, Jorge Quereda
Summary: This study investigates the photoresponse of fully h-BN encapsulated monolayer (1L) MoS2 phototransistors and identifies a rapidly-responding photogating effect mechanism. By fitting the power dependence of this photogating effect and estimating the energy level of the traps involved, it is found that the traps are compatible with shallow traps in MoS2 caused by sulfur vacancies.
Article
Chemistry, Multidisciplinary
Arindam Bala, Na Liu, Anamika Sen, Yongin Cho, Pavan Pujar, Byungjun So, Sunkook Kim
Summary: This study utilizes plasma-enhanced chemical vapor deposition to grow large-area MoS2 on regular glass and fabricate transparent thin film transistors (TFTs) with good performance parameters. The stable and uniform photoresponse of transparent MoS2 TFTs is significant for the fabrication of transparent image sensors in the field of optoelectronics.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Ruchi Singh, Chandrabhan Patel, Pawan Kumar, Mayank Dubey, Sharath Sriram, Shaibal Mukherjee
Summary: Metal-semiconductor-metal (MSM) photodetectors achieve efficient performance with low dark current and high photocurrent, as well as high peak responsivity and external quantum efficiency, through wet transfer and patterned electrode structure.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Pengcheng Jian, Shizhou Tan, Zhihua Zheng, Weijie Liu, Yongming Zhao, Dan Xu, Peng Wang, Jiangnan Dai, Feng Wu, Changqing Chen
Summary: A simple and cost-effective method is developed for fast synthesis of high-quality monolayer MoS2 nano-microribbons. The morphology and dimensionality of MoS2 can be controlled by adjusting the NaOH concentration and growth time. A phototransistor based on the synthesized MoS2 nanomicroribbons exhibits excellent performance.
SCIENCE CHINA-MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Kazi M. Islam, Timothy Ismael, Claire Luthy, Orhan Kizilkaya, Matthew D. Escarra
Summary: In this study, lateral Schottky-junction photovoltaic devices based on monolayer MoS2 were fabricated using chemical vapor deposition (CVD) and characterized. The devices showed repeatable performance under 1 sun illumination and an optoelectronic model was developed to understand loss mechanisms and optimize device designs. A large-area solar cell made with CVD-grown scalable 2D materials was successfully demonstrated.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Physics, Applied
Jiaxin Cheng, Chao An, Liang Li, Lijie Chen, Yana Cui, Qijie Yan, Yanling Yin, Weichang Zhou, Yuehua Peng, Weike Wang, Dongsheng Tang
Summary: (TaSe4)(2)I nanowires, prepared by the scotch-tape mechanical exfoliation method, exhibit superior optoelectronic properties and excellent performance as near-infrared photodetectors, with a high responsivity of 0.792 A W-1 and an external quantum efficiency of 100.259%. These outstanding properties make (TaSe4)(2)I a highly competitive candidate for high-performance near-infrared photodetectors.
APPLIED PHYSICS LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Lixiang Xing, Yujiao Xiahou, Xiang Zhang, Wei Du, Panpan Zhang, Haibing Xia
Summary: In this study, core-shell Au-5.5@Ag-m nanoparticles with controlled thicknesses of Ag shells were successfully synthesized. High-quality monolayer films of hexagonal close-packed Au@Ag nanoparticles were fabricated using self-assembly methods. These films exhibited uniform surface-enhanced Raman scattering signals when transferred onto PDMS substrates. They showed high sensitivity and quantitative detection ability for crystal violet and 4-aminothiophenol.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Timothy Ismael, Nathan J. Grinalds, Muhammad A. Abbas, Noah Hill, Claire E. Luthy, Matthew D. Escarra
Summary: This study investigates the dependence of large area 2D MoS2 phototransistor performance on film morphology through correlative mapping. The results demonstrate the benefit of using correlative mapping in understanding and advancing large area 2D material-based electronic and optoelectronic devices.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Ji Yu, Jie Zheng, Ning Tian, Lin Li, Yanmei Qu, Yongtao Huang, Yinxian Luo, Wenzhu Tan
Summary: Limited electrode structure types of current CH3NH3PbCl3 perovskite single crystal photodetectors result in devices with either good performance but small active area, or large active area but poor performance. In this study, a CH3NH3PbCl3 single crystal photodetector with asymmetrical Schottky interdigital contacts was fabricated, achieving both a large active area and excellent photoelectric performance.
Article
Chemistry, Multidisciplinary
Hao-Yu Lan, Yu-Hung Hsieh, Zong-Yi Chiao, Deep Jariwala, Min-Hsiung Shih, Ta-Jen Yen, Ortwin Hess, Yu-Jung Lu
Summary: Monolayer transition metal dichalcogenides have low total absorption of photons, hindering the realization of high-performance optoelectronic functionalities. Gate-tunable plasmonic photoFETs show potential for enhancing photoresponsivity and photocurrent in monolayer MoS2, providing a systematic methodology for designing ultrathin plasmon-enhanced photodetectors for future compact optoelectronic devices.
Article
Nanoscience & Nanotechnology
Mattia Scagliotti, Matteo Salvato, Maurizio De Crescenzi, Neeraj Mishra, Filippo Fabbri, Vaidotas Miseikis, Camilla Coletti, Daniele Catone, Lorenzo Di Mario, Maurizio Boscardin, Paola Castrucci
Summary: The realized graphene/Si heterojunction device exhibits high sensitivity, fast response time, high quantum efficiency, and versatility in detecting various light sources, making it competitive and multifunctional in different applications.
Article
Physics, Applied
Yuhan Li, Qiaoqiao Li, Zichen Wang, Zhiyu Huang, Juntong Zhu, Ali Imran Channa, Fan Cui, Hao Xu, Xiao Li, Liujiang Zhou, Guifu Zou
Summary: This study engineered the optical properties of MoS2 by alloying with Se, extending its optical absorption to the near-infrared (NIR) region. Phototransistors based on this alloyed monolayer MoS2(1-x)Se2x exhibited high photoresponsivity and external quantum efficiency. Density functional theory calculations provided insight into the mechanism of near-infrared absorption.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Aaron M. Schankler, Lingyuan Gao, Andrew M. Rappe
Summary: This study investigates the shift current bulk photovoltaic effect in MoS2, revealing that a distortion to the material through an applied electric field can enhance the integrated shift current. The overlap in the Brillouin zone of the shift vector distributions and transition intensity is found to be crucial for increasing the shift current. This suggests a new method for engineering the shift current response of materials, in addition to previously reported methods using mechanical strain.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Taegeon Lee, Young-Gui Yoon, Seung Won Lee, Ji-Hoon Ahn, Heesuk Rho
Summary: In this study, the evolution of strain and charge carriers in monolayer MoS2 during large-area growth was investigated using Raman and photoluminescence techniques. The results showed that both compressive strain and charge carriers increased as the morphology changed from a triangular flake to a partially coalesced film and finally to a fully covered film, indicating an increase in sulfur vacancies with surface coverage. Theoretical calculations supported these evolution scenarios. Photoluminescence and Raman correlation data provided quantitative information about electron concentrations. Additionally, chemical treatment with a p-type dopant relaxed compressive strain and decreased excess electrons, with a more significant effect in the fully covered film region.
APPLIED SURFACE SCIENCE
(2023)
Article
Physics, Applied
Xudong Zheng, Eli Gerber, Jisung Park, Don Werder, Orrin Kigner, Eun-Ah Kim, Saien Xie, Darrell G. Schlom
Summary: Bandgap engineering is crucial for heterojunction device design, where controlling carrier concentration in monolayer-thick materials like MoS2 is achieved through growth on various substrates. This approach allows for precise carrier concentration control in large-scale heterostructures involving monolayer-thick materials.
APPLIED PHYSICS LETTERS
(2021)
Review
Chemistry, Physical
Yang Zhao, Jiazhao Huang, Jianqiang Chen, Youwen Liu, Tianyou Zhai
Summary: Two-dimensional transition metal dichalcogenides (TMDs) have shown excellent catalytic performance for hydrogen evolution and are considered suitable substitutes for commercial Pt-based catalysts. Chemical vapor deposition (CVD) is an important technique for synthesizing controllable and high-purity TMDs for electrocatalysis and electronic devices. Recent research progress in CVD-grown TMDs nanosheets for electrocatalytic hydrogen evolution, including synthesis factors and engineering strategies, has been presented in this review.
Article
Materials Science, Multidisciplinary
Lixin Liu, Pengyu Li, Yinghe Zhao, Haiyang Song, Teng Liu, Huiqiao Li, Tianyou Zhai
Summary: This study identifies zeolite-like molecules as potential dielectric materials for 2D semiconductors. These molecules exhibit similar properties to SiO2, the commonly used dielectric material in the Si-based semiconductor industry, and can form ideal interfaces with 2D semiconductors while preserving their intrinsic semiconductor properties. Additionally, the molecules with a zeolite-like backbone demonstrate remarkable environmental stability.
SCIENCE CHINA-MATERIALS
(2023)
Review
Physics, Applied
Jie Wu, Fuwei Zhuge, Huiqiao Li, Tianyou Zhai
Summary: Two-dimensional metal chalcogenides (MCs) have shown great potential in high-performance (opto) electronic devices. The development of p-type MCs is urgently needed for various applications. In this review, we summarize recent advances in the synthesis routes and doping strategies of 2D p-type MCs, as well as their applications in electronics and optoelectronics. We also highlight the challenges and prospects in this field.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Guxin Huang, Jianing Liang, Xingguo Zhong, Haoyue Liang, Can Cui, Cheng Zeng, Shuhao Wang, Mengyi Liao, Yue Shen, Tianyou Zhai, Ying Ma, Huiqiao Li
Summary: In this study, the pre-lithiation performance of Li2C2O4 as a cathode additive was greatly improved by optimizing the combination of conductive additives and catalysts, reducing the particle size, and designing a bilayer electrode. By lowering the delithiation potential, the capacity of Li2C2O4 was increased to its theoretical value and effectively applied to a hard carbon anode.
Review
Chemistry, Multidisciplinary
Shaohua Li, Decai Ouyang, Na Zhang, Yi Zhang, Akshay Murthy, Yuan Li, Shiyuan Liu, Tianyou Zhai
Summary: This review focuses on the use of substrate engineering strategies for the controlled growth of large-scale 2D transition metal dichalcogenides (TMDs). It provides insights into the interaction between TMDs and substrates and summarizes the effects of various substrate engineering approaches on the growth of 2D TMDs. The review also discusses the opportunities and challenges of substrate engineering for the future development of 2D TMDs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jiabin Wu, Jianwei Su, Tao Wu, Liang Huang, Qun Li, Yongxin Luo, Hongrun Jin, Jun Zhou, Tianyou Zhai, Dingsheng Wang, Yury Gogotsi, Yadong Li
Summary: A new salt-assisted templating approach is developed for the direct synthesis of low-defect concentration 2D molybdenum carbide. The thickness of the produced carbide flakes can range from monolayer to 10 layers, with the monolayer showing remarkable electrocatalytic hydrogen evolution reaction (HER) performance. This approach also expands the family of 2D carbides.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yuan Chen, HuiChao Dai, Kun Fan, Guoqun Zhang, Mi Tang, Yanbo Gao, Chengyang Zhang, Linnan Guan, Minglei Mao, Huan Liu, Tianyou Zhai, Chengliang Wang
Summary: Redox organic electrode materials (OEMs) have the potential for high performance in batteries but practical application still faces challenges in terms of cost, recyclability, scalability, and performance. This study presents an OEM for high-performance aqueous organic batteries, demonstrating fast proton storage and high mass loading capabilities. The laminated pouch cells showed Ampere-hour-scale capacity and excellent cycling performance. The electrodes, with their small molecular nature and stable charged and discharged states, can be recycled with high yields at any charge state. This work is a significant step towards the practical applications of OEMs for sustainable batteries in the future.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Jinzhong Zhang, Lixin Liu, Xu Luo, Wei Lu, Tianyou Zhai
Summary: Large-area Sb2O3 films were successfully deposited by thermal evaporation deposition, and their optical behaviors were investigated in detail. The as-deposited films exhibited a cubic phase with a lattice constant of about 11.16 angstroms. The thermal stability of lattice vibrations and optical constants, as well as the electronic transitions, were studied at different temperatures. The thermally robust crystalline structure and optical properties of a-Sb2O3 films make them promising for (opto)electronic devices.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Shunshun Zhao, Guangmeng Qu, Chenggang Wang, Xixi Zhang, Xiao Wang, Peiyu Hou, Gang Zhao, Jiancai Leng, Xijin Xu, Tianyou Zhai
Summary: An in-situ interfacial modification strategy is presented to construct a high-performance cathode (N-NCP@POx) for alkaline zinc batteries, which features an ultra-thin amorphous phosphate interfacial coating. The amorphous phosphate layers are beneficial for the adsorption and deprotonation of OH-, and protect the active species from passivation. The N-NCP@POx electrode exhibits remarkable energy storage capability and electrochemical stability, with outstanding specific capacity, rate performance, and cyclic stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Haitao Wang, Jizhou Jiang, Lianglang Yu, Jiahe Peng, Zhou Song, Zhiguo Xiong, Neng Li, Kun Xiang, Jing Zou, Jyh-Ping Hsu, Tianyou Zhai
Summary: Despite challenges, adjusting the microstructures and photo/electrochemical parameters of g-C3N4 is crucial for photocatalytic hydrogen evolution reaction. This study designs a novel S-g-C3N4-D catalyst with nitrogen-defects and sulfur-doping, which exhibits efficient light utilization and carrier separation and transfer. The developed S-g-C3N4-D catalyst shows a high H2 evolution rate of 5651.5 μmol g-1 h-1 and provides guidance for designing high-efficiency photocatalysts.
Article
Chemistry, Multidisciplinary
Pengyu Li, Yinghe Zhao, Huiqiao Li, Tianyou Zhai
Summary: This study systematically investigates the working mechanisms of Sb2O3 and two Sb2O3-like molecules (As2O3 and Bi2O3) as dielectrics, using a combination of first-principles calculations and gate leakage current theories. It is found that molecules-based vdW dielectrics have a significant advantage over conventional materials, as defects have hardly any impact on their insulating properties. Furthermore, the study reveals that Sb2O3 faces challenges in meeting the requirements for both p-MOS and n-MOS devices, while As2O3 can serve as a dielectric for both types. This research provides a theoretical foundation for the application of molecules-based vdW dielectrics and offers a competitive choice (As2O3) for optimizing the dielectric layer in 2D vdW semiconductor-based CMOS devices, with profound implications for the future semiconductor industry.
Article
Multidisciplinary Sciences
Jun Yu, Han Wang, Fuwei Zhuge, Zirui Chen, Man Hu, Xiang Xu, Yuhui He, Ying Ma, Xiangshui Miao, Tianyou Zhai
Summary: The authors demonstrate the realization of ultrafast and robust memory operation in a two-dimensional van der Waals flash memory with 2H-MoS2 as the semiconductor channel and metallic 1T-LixMoS2 as the edge contact. The contact engineering strategy improves the performance of 2D flash memory devices, achieving program/erasing speed of similar to 10/100ns, endurance of >10^6 cycles, and expected retention lifetime of >10 years.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yu Lin, Jiakun Fang, Wenbin Wang, Qunlei Wen, Danji Huang, Defang Ding, Zhen Li, Youwen Liu, Yi Shen, Tianyou Zhai
Summary: Economical NiFe-based catalysts that can accelerate green hydrogen production through water electrolysis have gained attention. However, the leaching of Fe atoms during operation limits their practical application. In this study, an operando reconstructed molecule fence, with sulfate-anchored aromatic ring molecules, is proposed to inhibit Fe leaching and improve catalyst durability. The protected catalysts show excellent stability under high current densities and frequent fluctuations, as well as in industrial water electrolysis equipment with low energy consumption.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yinghe Zhao, Haobo Li, Ruoou Yang, Shuxian Xie, Teng Liu, Pengyu Li, Youwen Liu, Huiqiao Li, Fa Yang, Tianyou Zhai
Summary: By using first-principles calculations, in situ attenuated total reflection surface enhanced infrared absorption spectroscopy and X-ray absorption fine structure measurements, this study identifies a transient phase-transition behavior in 2H-MoS2, which enables its basal plane to exhibit high HER activity. This discovery provides new opportunities for designing heterogeneous electrocatalysts and investigating the mechanistic process of heterogeneous electrocatalysis.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Hongyuan Zhang, Zhi Zheng, Zhicheng Zhang, Liang Hai, Haiyang Li, Shenghong Liu, Xiaoding Lou, Tianyou Zhai, Fan Xia
Summary: A gate-voltage-modulated strategy was proposed to enhance the detection performance of telomerase. The mechanism for the improved detection performance was comprehensively investigated by modulating the electrostatic interaction between a single-stranded DNA probe and electrons of the In2O3 channel. This gate-voltage modulation could potentially be utilized as a universal strategy for high-performance FET biosensors.
CHEMICAL COMMUNICATIONS
(2023)
