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Direct Photolithography of WO_(x)Nanoparticles for High‑Resolution Non‑Emissive Displays

Nano-Micro Letters 2025年第3期17卷 297-309页

作者： Chang Gu Guojian Yang Wenxuan Wang Aiyan Shi Wenjuan Fang Lei Qian Xiaofei Hu Ting Zhang chaoyu xiang Yu‑Mo Zhang Laboratory of Optoelectronic Information Technology and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Hangzhou Bay Laboratory of Advanced Nano‑Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315336People’s Republic of China Smart Materials for Architecture Research Lab Innovation Center of Yangtze River DeltaZhejiang UniversityJiaxing 314100People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China State Key Lab of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012People’s Republic of China

High-resolution non-emissive displays based on electrochromic tungsten oxides(WOx)are crucial for future near-eye virtual/augmented reality interactions,given their impressive attributes such as high environmental stability,ideal outdoor readability,and low energy ***,the limited intrinsic structure of inorganic materials has presented a significant challenge in achieving precise patterning/pixelation at the micron ***,we successfully developed the direct photolithography for WOx nanoparticles based on in situ photo-induced ligand *** strategy enabled us to achieve ultra-high resolution efficiently(line width3600 cycles),as well as promising applications in electronic logos,pixelated displays,flexible electronics,*** success and advancements presented here are expected to inspire and accelerate research and development(R&D)in high-resolution non-emissive displays and other ultra-fine micro-electronics.

关键词： Electrochromic Direct photolithography WOx nanoparticles In situ photo-induced ligand exchange High-resolution displays

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Proton‑Prompted Ligand Exchange to Achieve High‑Efficiency CsPbI_(3) Quantum Dot Light‑Emitting Diodes

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Nano-Micro Letters 2024年第6期16卷 53-62页

作者： Yanming Li Ming Deng Xuanyu Zhang Lei Qian chaoyu xiang Laboratory of Advanced Nano‑Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315300People’s Republic of China Division of Functional Materials and Nanodevices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211ZhejiangPeople’s Republic of China University of Nottingham Ningbo China Ningbo 315100People’s Republic of China

CsPbI_(3)perovskite quantum dots(QDs)are ideal materials for the next generation of red light-emitting ***,the low phase stability of CsPbI_(3)QDs and long-chain insulating capping ligands hinder the improvement of device *** in-situ ligand replacement and ligand exchange after synthesis were often difficult to ***,we proposed a new ligand exchange strategy using a proton-prompted insitu exchange of short 5-aminopentanoic acid ligands with long-chain oleic acid and oleylamine ligands to obtain stable small-size CsPbI_(3)*** exchange strategy maintained the size and morphology of CsPbI_(3)QDs and improved the optical properties and the conductivity of CsPbI_(3)QDs *** a result,high-efficiency red QD-based light-emitting diodes with an emission wavelength of 645 nm demonstrated a record maximum external quantum efficiency of 24.45%and an operational half-life of 10.79 h.

关键词： CsPbI_(3) perovskite quantum dots Light-emitting diodes Ligand exchange Proton-prompted in-situ exchange

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A systematic study on efficiency enhancements in phosphorescent green, red and blue microcavity organic light emitting devices

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Light(Science & Applications) 2013年第1期2卷 143-149页

作者： chaoyu xiang Wonhoe Koo Franky So Hisahiro Sasabe Junji Kido Department of Materials Science and Engineering University of FloridaGainesvilleFL 32611-6400USA Department of Polymer Science and Engineering Yamagata UniversityYamagata 992-8510Japan

A systematic study has been conducted on microcavity organic light emitting diodes(OLEDs)based on green,red and blue phosphorescent emitters to elucidate the microcavity effects for different color *** found that the luminance output is determined by the reflectivity of the semitransparent electrode and the photopic response of the green,red and blue *** the luminance enhancements of blue and red phosphorescent microcavity devices are small,a current efficiency as high as 224 cd A21 is obtained in the green phosphorescent microcavity OLEDs.

关键词： efficiency enhancements microcavity organic light emitting devices phosphorescence photopic luminosity

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Revealing the origin of the photo-instability to improve the performance of PbS quantum dot solar

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Nano Research 2024年第12期17卷 10644-10648页

作者： Chunyan Wu Jinpeng Yang Shuo Ding Tengzuo Huang Tao Sun Lei Qian chaoyu xiang Laboratory of Advanced Nano-Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315336China Laboratory of Advanced Nano-Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China International Joint Research Center of China for Optoelectronic and Energy Materials Energy Research InstituteYunnan UniversityKunming 650091China Department of Mechanical Materials and Manufacturing EngineeringUniversity of Nottingham Ningbo ChinaNingbo 315100China

Stability under light is critical for lead sulfide quantum dots(PbS QDs)in solar cell *** improve the stability of PbS QDs solar cells,the influence of the light illumination on the performance of the as-prepared PbS QDs solar cells was carefully *** with X-ray and ultraviolet photoelectron spectroscopies,it was revealed that the 1,2-ethanedithiol(EDT)ligands of the hole transport p-type PbS QDs reacted with the ligands of the PbS QDs active layer under light *** reaction not only undermines the n-type characteristics of the active layer,but also increases the number of defects,leading to a serious deterioration in device *** interface layer was introduced to block the EDT penetration to avoid this issue,significantly improving the stability of the device under light ***,the separation of carriers was also enhanced due to the better matching the energy level of the interface *** device with an interface layer yielded a power conversion efficiency of 12.55%and sustained to a long time light illumination.

关键词： solar cell lead sulfide quantum dots(PbS QDs) photo-instability interlayer lght illumination

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Materials and device engineering to achieve high-performance quantum dots light emitting diodes for display applications

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Chinese Physics B 2023年第12期32卷 1-13页

作者：韩长峰钱若曦向超宇钱磊 Laboratory of Advanced Nano-Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315300China Division of Functional Materials and Nanodevices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Jiangsu JITRI Molecular Engineering Inst.Co. Ltd.Changshu 215500China Shenzhen Research Institute Beijing Institute of Technology Shenzhen 518057China

Quantum dots(QDs)have attracted wide attention from academia and industry because of their advantages such as high emitting efficiency,narrow half-peak width,and continuously adjustable emitting *** light emitting diodes(QLEDs)are expected to become the next generation commercial display *** paper reviews the progress of QLED from physical mechanism,materials,to device *** strategies to improve QLED performance from the perspectives of quantum dot materials and device structures are summarized.

关键词： quantum dots light emitting diodes device engineering

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Optimal Strategies Trajectory with Multi-Local-Worlds Graph

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Computers, Materials & Continua 2023年第4期75卷 2079-2099页

作者： xiang Yu Chonghua Wang Xiaojing Zheng chaoyu Zeng Brij BGupta School of Electronics and Information Engineering Taizhou UniversityTaizhouZhejiang318000China China Industrial Control Systems Cyber Emergency Response Team Beijing100040China School of Economics and Management Weifang University of Science and TechnologyShouguangShandong262700China National Computer System Engineering Research Institute of China Beijing102699China Department of Computer Science and Information Engineering Asia UniversityTaiwanTaichung413China Research and Innovation Department Skyline University CollegeSharjahP.O.Box 1797United Arab Emirates Staffordshire University Stoke-on-TrentST42DEUK

This paper constructs a non-cooperative/cooperative stochasticdifferential game model to prove that the optimal strategies trajectory ofagents in a system with a topological configuration of a Multi-Local-Worldgraph would converge into a certain attractor if the system’s configuration isfixed. Due to the economics and management property, almost all systems aredivided into several independent Local-Worlds, and the interaction betweenagents in the system is more complex. The interaction between agents inthe same Local-World is defined as a stochastic differential cooperativegame;conversely, the interaction between agents in different Local-Worldsis defined as a stochastic differential non-cooperative game. We construct anon-cooperative/cooperative stochastic differential game model to describethe interaction between agents. The solutions of the cooperative and noncooperativegames are obtained by invoking corresponding theories, and thena nonlinear operator is constructed to couple these two solutions *** last, the optimal strategies trajectory of agents in the system is proven toconverge into a certain attractor, which means that strategies trajectory arecertainty as time tends to infinity or a large positive integer. It is concluded thatthe optimal strategy trajectory with a nonlinear operator of cooperative/noncooperativestochastic differential game between agents can make agentsin a certain Local-World coordinate and make the Local-World paymentmaximize, and can make the all Local-Worlds equilibrated;furthermore, theoptimal strategy of the coupled game can converge into a particular attractorthat decides the optimal property.

关键词： Multi-Local-world graph stochastic differential game optimal strategy attractor

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Robust transport of charge carriers in in-plane 1T′-2H MoTe_(2) homojunctions with ohmic contact

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Nano Research 2021年第5期14卷 1311-1318页

作者： Donglin Lu Zhenqing Li Congsheng Xu Siwei Luo chaoyu He Jun Li Gang Guo Guolin Hao xiang Qi Jianxin Zhong Hunan Key Laboratory for Micro-Nano Energy Materials and Devices Laboratory for Quantum Engineering and Micro-Nano Energy Technologyand School of Physics and OptoelectronicsXiangtan UniversityHunan411105China

Metal-semiconductor ohmic contacts are required to reduce the energy dissipation for two-dimensional (2D) electronic devices, and phase engineering of 2D transition-metal dichalcogenides (TMDCs) is a promising approach for building ohmic contacts. Here, 2D in-plane 1T′-2H MoTe2 homojunctions were prepared by direct epitaxy via vapor deposition. The interface properties of in-plane 1T′-2H MoTe2 homojunction were investigated in detail by combining experiments, calculations and theories. The ohmic contact properties of 1T′-2H MoTe2 homojunction were proved according to Kelvin force probe microscopy and density functional theory calculations. The charge carriers robust transport in in-plane 1T′-2H MoTe2 homojunction without Fermi-level pinning can be well described by Poisson equation and band alignment. These results indicate that phase engineering of 2D TMDCs is promising to construct ohmic contacts for device applications.

关键词： 1T′-2H MoTe_(2)homojunction ohmic contact surface potential built-in potential

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Revealing the correlation between structure evolution and electrochemical performance of high-voltage lithium cobalt oxide

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Journal of Energy Chemistry 2021年第3期30卷 786-794页

作者： Jiajia Wan Jianping Zhu Yuxuan xiang Guiming Zhong xiangsi Liu Yixiao Li Kelvin H.L.Zhang chaoyu Hong Jianming Zheng Kai Wang Yong Yang Collaborative Innovation Center of Chemistry for Energy Materials State Key Laboratory for Physical Chemistry of Solid SurfaceCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Xiamen Institute of Rare Earth Materials Haixi InstitutesChinese Academy of SciencesXiamen 361021FujianChina Department of Chemical and Biochemical Engineering College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Ningde Amperex Technology Ltd Ningde 352100FujianChina School of Energy Xiamen UniversityXiamen 361005FujianChina

Lithium cobalt oxide(LCO)is the dominating cathode materials for lithium-ion batteries(LIBs)deployed in consumer electronic devices for its superior volumetric energy density and electrochemical *** constantly increasing demands of higher energy density urge to develop high-voltage LCO via a variety of ***,the corresponding modification mechanism,especially the influence of the long-and short-range structural transitions at high-voltage on electrochemical performance,is still not well understood and needs further *** on ss-NMR,in-situ X-ray diffraction,and electrochemical performance results,it is revealed that the H3 to H1-3 phase transition dictates the structural reversibility and stability of LCO,thereby determining the electrochemical *** introduction of La and Al ions could postpone the appearance of H1-3 phase and induce various types of local environments to alleviate the volume variation at the atomic level,leading to better reversibility of the H1-3 phase and smaller lattice strain,and significantly improved cycle *** a comprehensive long-range,local,and electronic structure characterization enables an in-depth understanding of the structural evolution of LCO,providing a guiding principle for developing high-voltage LCO for high energy density LIBs.

关键词： Lithium cobalt oxide High-voltage In-situ XRD Solid-state NMR Structure change

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声学超表面的非对称声分束特性研究

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人工晶体学报 2021年第7期50卷 1362-1370页

作者：宋爱玲孙超彧陈天宁项延训轩福贞华东理工大学机械与动力工程学院上海200237 西安交通大学机械工程学院西安710049

非对称声分束超表面是由人工微单元结构按照特定序列构建的二维平面结构,可将垂直入射的声波分成两束传播方向和分束比自由调控的透射波,在声功能器件设计及声通信领域具有广泛的应用前景。本文系统研究了一种实现非对称声分束的设计理... 详细信息

非对称声分束超表面是由人工微单元结构按照特定序列构建的二维平面结构,可将垂直入射的声波分成两束传播方向和分束比自由调控的透射波,在声功能器件设计及声通信领域具有广泛的应用前景。本文系统研究了一种实现非对称声分束的设计理论和实现方法,基于局域声功率守恒条件研究了声分束器的设计理论、阻抗矩阵分布、法向声强分布、声压场分布等。利用遗传算法对四串联共振腔结构进行参数优化实现了声分束器所需的阻抗矩阵分布,声压场分布表明声波入射到声分束器后在入射侧激发出两列传播方向相反且幅值和衰减系数均相同的表面波,实现了入射侧与透射侧的局域声功率相互匹配。声波经过声分束器后被分为两束透射波,两束透射波的折射角和透射系数与理论值十分吻合,证明了设计理论及实现方法的正确性和可行性。本文的研究工作可以为新型非对称声分束结构设计提供理论参考、设计方法和技术支持,并促进其在工程领域的实际应用。

关键词：非对称声分束声学超表面局域声功率阻抗矩阵共振腔

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高温固体氧化物燃料电池多孔电极结构介尺度研究方法

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化工进展 2020年第3期39卷 906-915页

作者：梁超余王家堂苗鹤韩越冯祥叶伟强袁金良宁波大学海运学院浙江宁波315211 广州航海学院轮机工程学院广东广州510330

高温固体氧化物燃料电池(SOFC)在可持续新能源领域具有广泛的研究与应用前景,多孔电极结构的本质特征是介尺度,这种特性对电极内物质传输和电池性能起着决定性作用。本文综述了应用于多孔电极结构的微尺度和介尺度的数值、物理研究方法... 详细信息

高温固体氧化物燃料电池(SOFC)在可持续新能源领域具有广泛的研究与应用前景,多孔电极结构的本质特征是介尺度,这种特性对电极内物质传输和电池性能起着决定性作用。本文综述了应用于多孔电极结构的微尺度和介尺度的数值、物理研究方法以及介尺度耦合其他尺度的多尺度方法,分别讨论了各方法适用的研究内容、研究进展及其优缺点。通过分析得出,微尺度方法可精确模拟SOFC电极材料的微观特性,介尺度方法可重构复杂的电极微观结构、模拟三相反应,同时是研究电极微观结构和宏观模拟之间的重要桥梁,因此,介尺度与其他尺度方法的耦合可以较好地解决微观结构和多物理场耦合下的相互作用。在未来的研究中,降低介尺度及其耦合的多尺度方法的计算成本、发展先进的实验设备和可视化技术具有重要的研究潜力与价值。

关键词：燃料电池多孔电极微尺度介尺度多尺度

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