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Large-Area Monolayer n-Type Molecular Semiconductors with Improved Thermal Stability and Charge Injection

Chinese Physics Letters 2023年第3期40卷 68-73页

作者： Sai Jiang Lichao Peng Xiaosong Du Qinyong Dai Jianhang Guo Jianhui Gu Jian Su Ding Gu Qijing Wang Huafei Guo Jianhua Qiu Yun Li School of Microelectronics and Control Engineering Changzhou UniversityChangzhou 213164China National Laboratory of Solid-State Microstructures School of Electronic Science and EngineeringCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

We fabricated monolayer n-type two-dimensional crystalline semiconducting films with millimeter-sized areas and remarkable morphological uniformity using an antisolvent-confined spin-coating *** antisolvent can cause a downstream Marangoni flow,which improves the film *** deposited crystalline monolayer films exhibit excellent thermal stabilities after annealing,which reveals the annealing-induced enhancement of *** transistors based on the n-type monolayer crystalline films show linear output characteristics and superior electron *** improved charge injection between monolayer films and Au electrodes results from the energy level shift as the films decrease to the monolayer,which leads to a lower injection *** work demonstrates a promising method for fabricating air-stable,low-cost,high-performance,and large-area organic electronics.

关键词： monolayer crystalline annealing

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Gate-tunable spin valve effect in Fe_(3)GeTe_(2)-based van der Waals heterostructures

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InfoMat 2023年第3期5卷 1-10页

作者： Ling Zhou Junwei Huang Ming Tang Caiyu Qiu Feng Qin Caorong Zhang Zeya Li Di Wu Hongtao Yuan National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjingthe People's Republic of China

Magnetic tunnel junctions(MTJs),a prominent type of spintronic device based on the spin valve effect,have facilitated the development of numerous spintronic *** technical appeal for the next-generation MTJ devices has been proposed in two directions:improving device performance by utilizing advanced two-dimensional(2D)ferromagnetic materials or extending device functionalities by exploring the gate-tunable magnetic properties of *** on the recent development of 2D magnets with the ease of external stimuli,such as electric field,due to their reduced dimensions,reliable prospects for gate-tunable MTJ devices can be achieved,shedding light on the great potential of next-generation MTJs with multiple functionalities for various application *** the electrical gate-tunable MTJ device is highly desirable for practical spintronic devices,it has not yet been ***,we demonstrate the experimental realization of a spin valve device by combining a vertical Fe_(3)GeTe_(2)/h-BN/Fe_(3)GeTe_(2) MTJ with an electrolyte *** magnetoresistance ratio(MR ratio)of 36%for the intrinsic MTJ confirms the good performance of the *** electrolyte gating,the tunneling MR ratio of Fe_(3)GeTe_(2)/h-BN/Fe_(3)GeTe_(2) MTJ can be elevated 2.5 times,from 26%to 65%.Importantly,the magnetic fields at which the magnetoresistance switches for the MTJ can be modulated by electrical gating,providing a promising method to control the magnetization configuration of the *** work demonstrates a gate-tunable MTJ device toward the possibility for gate-controlled spintronic devices,paving the way for performing 2D magnetism manipulations and exploring innovative spintronic applications.

关键词： Fe_(3)GeTe_(2)magnetic tunnel junction magnetoresistance spin valve van der Waals heterostructure

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Alloyed Pt-Sn nanoparticles on hierarchical nitrogen-doped carbon nanocages for advanced glycerol electrooxidation

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Nano Research 2024年第5期17卷 4055-4061页

作者： Jietao Jiang Liqi Zhou Fengfei Xu Guanghai Chen Xiaoyu Liu Zhen Shen Lijun Yang Qiang Wu Xizhang Wang Zheng Hu Key Laboratory of Mesoscopic Chemistry of MOE Jiangsu Provincial Laboratory for NanotechnologySchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

Glycerol is an alternative sustainable fuel for fuel cells,and efficient electrocatalyst is crucial for glycerol oxidation reaction(GOR).The promising Pt catalysts are subject to the inadequate capability of C-C bond cleavage and the susceptibility to ***,Pt-Sn alloyed nanoparticles are immobilized on hierarchical nitrogen-doped carbon nanocages(hNCNCs)by convenient ethylene glycol reduction and subsequent thermal *** optimal Pt_(3)Sn/hNCNC catalyst exhibits excellent GOR performance with a high mass activity(5.9 A·mg_(Pt)^(-1)),which is 2.7 and 5.4 times higher than that of Pt/hNCNC and commercial Pt/C,*** an enhancement can be mainly ascribed to the increased anti-poisoning and C-C bond cleavage capability due to the Pt_(3)Sn alloying effect and Sn-enriched surface,the high dispersion of Pt_(3)Sn active species due to N-participation,as well as the high accessibility of Pt_(3)Sn active species due to the three-dimensional(3D)hierarchical architecture of *** study provides an effective GOR electrocatalyst and convenient approach for catalyst preparation.

关键词： Pt_(3)Sn alloy hierarchical nitrogen-doped carbon nanocages glycerol electrooxidation anti-poisoning C-C bond cleavage

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A highly visible-transparent thermochromic smart window with broadband infrared modulation for all-season energy savings

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National Science Review 2025年第2期12卷 197-207页

作者： Yi Jiang Yunlong Wang Deshuo Kong Zipeng Chen Zhengwei Yang Ningning Cao Haowen Chi Shining Zhu Qiuhong Zhang Jia Zhu Bin Zhu National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsFrontiers Science Center for Critical Earth Material Cycling Collaborative Innovation Center of Advanced MicrostructuresNanjing University Key Laboratory of High Performance Polymer Material and Technology of MOE Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringNanjing University

Thermochromic smart windows effectively reduce the energy consumption for buildings through passive light modulation including the transmission of visible(TVis) and near-infrared(TNIR) light, and the emissivity of mid-infrared light(εMIR) in response to ambient temperature change. However,thermochromic windows that maintain high TViswhile modulating TNIRand εMIRsimultaneously are highly desirable but still challenging. Here, we develop a thermochromic smart window based on a two-way shape memory polymer to enable reversible transformation and achieve TNIRmodulation of 44.0% and εMIRmodulation of 76.5% while maintaining high TVis（>50%）. Compared to traditional windows based on silica glass, this device shows 4℃ lower temperature in summer daytime, 2℃ higher in winter daytime,and 1℃ higher in spring nighttime. It is expected that our device can achieve greater annual energy savings in comparison with commercial glass anywhere in the world and promote the progress of thermochromic windows for energy-efficient buildings.

关键词： thermochromic smart window visible transparency infrared modulation two-way shape memory polymer

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Beating the Fault-Tolerance Bound and Security Loopholes for Byzantine Agreement with a Quantum Solution

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Research 2024年第3期2023卷 445-455页

作者： Chen-Xun Weng Rui-Qi Gao Yu Bao Bing-Hong Li Wen-Bo Liu Yuan-Mei Xie Yu-Shuo Lu Hua-Lei Yin Zeng-Bing Chen National Laboratory of Solid State Microstructures and School of Physics Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education)Renmin University of ChinaBeijing 100872China.

Byzantine agreement,the underlying core of blockchain,aims to make every node in a decentralized network reach *** Byzantine agreements unavoidably face two major *** is 1/3 fault-tolerance bound,which means that the system to tolerate f malicious players requires at least 3f+1 *** other is the security loopholes from its classical cryptography ***,we propose a Byzantine agreement framework with unconditional security to break this bound with nearly 1/2 fault tolerance due to multiparty correlation provided by quantum digital *** is intriguing that quantum entanglement is not necessary to break the 1/3 fault-tolerance bound,and we show that weaker correlation,such as asymmetric relationship of quantum digital signature,can also *** work strictly obeys two Byzantine conditions and can be extended to any number of players without requirements for multiparticle *** experimentally demonstrate three-party and five-party consensus for a digital *** work indicates the quantum advantage in terms of consensus problems and suggests an important avenue for quantum blockchain and quantum consensus networks.

关键词： methods quantum signature

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Formation of hierarchically 3D cactus-like architecture as efficient Mott-Schottky electrocatalyst for long-life Li-S batteries

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Nano Research 2023年第7期16卷 9318-9326页

作者： Biao Wang Yilun Ren Shaowei Chen Qingxi Zhai Yuxuan Shi Yujie Ma Shaochun Tang Xiangkang Meng National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093China Haian Institute of High-Tech Research Nanjing UniversityNanjing 226600China

Searching for new promising electrocatalysts with favorable architectures allowing abundant active sites and remarkable structure stability is an urgent task for the practical application of lithium-sulfur(Li-S)***,inspired by the structure of natural cactus,a new efficient and robust electrocatalyst with three-dimensional(3D)hierarchical cactus-like architecture constructed by functional zero-dimensional(0D),one-dimensional(1D),and two-dimensional(2D)components is *** cactus-inspired catalyst(denoted as Co@NCNT/NCNS)consists of N-doped carbon nanosheets(NCNS)and standing Ndoped carbon nanotubes(NCNT)forest with embedded Co nanoparticles on the top of NCNT,which was achieved by an in situ catalytic growth *** unique structure design integrates the advantages of 0D Co accelerating catalytic redox reactions,1D NCNT providing a fast electron pathway,and 2D NCNS assuring strong structure ***,the rich Mott-Schottky heterointerfaces between metallic Co and semiconductive NCNT can further facilitate the electron transfer,thus improving the electrocatalyst ***,a Li-S battery with the Co@NCNT/NCNS modified separator achieves ultralong cycle life over 4000 cycles at 2 C with ultralow capacity decay of 0.016%per cycle,much superior over that of recently reported *** work provides a new strategy for developing ultra-stable catalysts towards long-life Li-S batteries.

关键词： lithium-sulfur batteries multifunctional separator shuttle effect enhanced catalytic activity Mott-Schottky electrocatalyst

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Batteries for wearables

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National Science Review 2023年第1期10卷 9-11页

作者： Lie Wang Ye Zhang Peter G.Bruce National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional Materials Chemistry and Biomedicine Innovation Center (Chem BIC) Collaborative Innovation Center of Advanced Microstructures College of Engineering and Applied Sciences Nanjing University Departments of Materials and Chemistry University of Oxford

Batteries that convert the stored chemical energy directly into electricity have been known for hundreds of *** the lithium-ion battery as representative because of its high energy-conversion efficiency and long cycle *** is widely used as a power accessory for electronic devices and has become an important part of modern electronics.

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From lab to fab: path forward for 2D material electronics

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Science China(Information Sciences) 2023年第6期66卷 115-121页

作者： Hongkai NING Zhihao YU Taotao LI Haoliang SHEN Gen LONG Yi SHI Xinran WANG National Laboratory of Solid State Microstructures School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced MicrostructuresNanjing University School of Integrated Circuits Nanjing University College of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications Suzhou Laboratory

The increasing demand for computation requires the development of energy-efficient logic devices with reduced dimensions. Owing to their atomic thickness, 2D semiconductors are expected to provide possible solutions at the sub-1 nm technology node. Furthermore, taking advantage of the van der Waals nature, the low-temperature back-end of line integration with silicon may occur in the near future. In this perspective, vital progress in material synthesis, device engineering, and integration technologies toward integrated circuits based on 2D materials is reviewed. The challenges and important milestones on the roadmap for the next decade toward the fab adoption of 2D materials are outlined. Particularly, performance,power, area, cost, and equipment for further technology development in this area are proposed as key metrics and enablers.

关键词： two-dimensional materials transition-metaldichalcogenides equipment integrated circuits roadmap

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Gate-tunable high-responsivity photodiode based on 2D ambipolar semiconductor

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Chinese Physics B 2025年第1期34卷 189-193页

作者： Wentao Yu Long Zhao Yanfei Gao Shiping Gao Yuekun Yang Chen Pan Shi-Jun Liang Bin Cheng Institute of Interdisciplinary Physical Sciences School of PhysicsNanjing University of Science and TechnologyNanjing 210094China Institute of Brain-Inspired Intelligence National Laboratory of Solid State MicrostructuresSchool of PhysicsCollaborative Innovation Center of Advanced MicrostructuresJiangsu Physical Science Research CenterNanjing UniversityNanjing 210093China

Electrically tunable homojunctions based on ambipolar two-dimensional materials have attracted widespread attention in the field of intelligent *** devices exhibit inherent switchable positive and negative photovoltaic properties that effectively mimic the behavior of human retinal ***,the photovoltaic responsivity of most electrically tunable homojunctions remains significantly low due to the weak light absorption,making it challenging to meet the application requirements for high-sensitivity target detection in the field of intelligent ***,we propose a gate-tunable photodiode based on two-dimensional ambipolar WSe_(2)with an asymmetric gate electrode,achieving high photovoltaic *** adjusting the gate voltage and keeping bias voltage zero,we can dynamically realize reconfigurable n-–p and n-–n homojunction states,as well as gate-tunable photovoltaic response characteristics that range from positive to *** maximum photovoltaic responsivity of the electrically tunable WSe_(2)homojunction is approximately 0.4 A/W,which is significantly larger than the previously reported value~0.1 A/W in homojunction *** addition,the responsivity can be further enhanced to approximately 1.0 A/W when the n-–p photodiode operates in reverse bias mode,enabling highsensitivity detection of *** work paves the way for developing gate-tunable photodiodes with high photovoltaic responsivity and advancing high-performance intelligent vision technology.

关键词： reconfigurable homojunction in sensor computing ambipolar material

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C_(60) as a metal-free catalyst for lithium-oxygen batteries

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Nano Research 2024年第5期17卷 3982-3987页

作者： Xinxin Zhang Jiaming Tian Yu Wang Shaohua Guo Yafei Li Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials School of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional MaterialsNational Laboratory of Solid State MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresFrontiers Science Center for Critical Earth Material CyclingNanjing UniversityNanjing 210023China

Carbon materials have shown significant potential as catalysts for lithium-oxygen batteries(LOBs).However,the intrinsic carbon sites are typically inert,necessitating extensive modifications and resulting in a limited density of active *** we present C_(60) as a metal-free cathode catalyst for LOBs,using density functional theory calculations and experimental *** lithiation reactions on the pristine carbon sites of C_(60) are energetically favorable due to its curvedπ-conjugation over the pentagon-hexagon *** kinetic analysis specifically reveals low energy barriers for Li_(2)O_(2) decomposition and Li diffusion on C_(60).Consequently,C_(60) exhibits significantly higher catalytic activity than typical carbon materials such as graphene and carbon *** electrochemical measurements validate the predictions,notably demonstrating that the intrinsic activity of C_(60) is comparable to that of noble metals.

关键词： lithium-oxygen batteries C_(60) density functional theory(DFT)calculations metal-free cathode

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