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FlexMat 2024年第2期1卷 127-149页

作者： Xiaozhe Cheng Zhitao Dou Hong Lian Zhitao Qin Hongen Guo Xifeng Li Wai-Yeung Wong Qingchen Dong MOE Key Laboratory of Advanced Display and System Applications Shanghai University Shanghai China School of Mechanical & Electronic Engineering and Automation Shanghai University Shanghai China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University (PolyU) Hong Kong China School of Microelectronics Shanghai University Shanghai China Qingchen Dong and Wai-Yeung Wong.

In recent decades, the microelectronics industry has developed rapidly based on the von Neumann architecture and under the guidance of Moore's law. However, as the size of electronic devices approaches the limit and power consumption increases, traditional microelectronic materials and devices are facing more and more challenges. As a new type of semiconductor material, halide perovskites (HPs) have excellent photoelectric characteristics, such as high carrier mobility, controllable band structure, etc., which have been widely used in solar cells, light emitting diodes (LEDs), photodetectors, memristors, and in other fields. Among them, the memristor, as a new type of electronic device, is very promising for in-memory computing with low power consumption by breaking the limit of von Neumann architecture. Especially, HPs-based memristors show outstanding photoelectric response performance, low power consumption, and flexible wearability, allowing them to hold great application potential in logical operation, polymorphic storage, and neuromorphic computing, etc. In this review, we first briefly introduce the basic characteristics and preparation methods of HPs. Secondly, the development history, device structure, and performance parameters of memristors are depicted in detail. Thirdly, the resistance mechanism and application of HPs-based memristors are discussed. Finally, the research status and development prospects of HPs-based memristors are outlined.

关键词： artificial synapse crystal structure halide perovskites memristor

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Investigation of post-thermal annealing-induced enhancement in photovoltaic performance for squaraine-based organic solar cells

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Frontiers of Materials Science 2020年第1期14卷 81-88页

作者： Rui Zhu Feiyang Liu Zixing Wang Bin Wei Guo Chen Key Laboratory of Advanced Display and System Applications(Ministry of Education) Shanghai UniversityYanchang Road 149Shanghai200072China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang212003China

In this work,we have systematically investigated the post-thermal annealing-induced enhancement in photovoltaic performance of a 2,4-bis[4-(N,N-diisobutylamino)-2,6-dihydroxyphenyl]squaraine(DIBSQ)/C60 planar heterojunction(PHJ)organic solar cells(OSCs).An increased power conversion efficiency(PCE)of 3.28%has been realized from a DIBSQ/C60 device with thermal annealing at 100°C for 4 min,which is about 33%enhancement compared with that of the as-cast *** improvement of the device performance may be mainly ascribed to the crystallinity of the DIBSQ film with post-thermal annealing,which will change the DIBSQ donor and C60 acceptor interface from^PHJ to hybrid planar-mixed *** new donor-acceptor heterojunction structure will significantly improve the charge separation and charge collection efficiency,as well as the open circuit voltage(Voc)of the device,leading to an enhanced *** work provides an effective strategy to improve the photovoltaic performance of SQ-based OSCs.

关键词： organic solar cell squaraine dye post-thermal annealing donor/acceptor interface power conversion efficiency

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Photo-controlled degradation of PLGA/Ti3C2 hybrid coating on Mg-Sr alloy using near infrared light

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Bioactive Materials 2021年第2期6卷 568-578页

作者： Li Liu Bo Huang Xiangmei Liu Wei Yuan Yufeng Zheng Zhaoyang Li Kelvin Wai Kwok Yeung Shengli Zhu Yanqin Liang Zhenduo Cui Shuilin Wu Hubei Key Laboratory of Polymer Materials Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsSchool of Materials Science&EngineeringHubei UniversityWuhan430062China State Key Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing100871China The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China School of Materials Science&EngineeringTianjin UniversityTianjin300072China Department of Orthopaedics&Traumatology Li Ka Shing Faculty of MedicineThe University of Hong KongPokfulamHong Kong999077China

A PLGA/Ti_(3)C_(2) hybrid coating was successfully deposited on the surface of magnesium-strontium(Mg-Sr)*** with the corrosion current density(icorr)of the Mg-Sr alloy(7.13×10^−5 A/cm^2),the modified samples(Mg/PLGA/Ti_(3)C_(2))was lower by approximately four orders of magnitude(7.65×10^−9 A/cm^2).After near infrared 808 nm laser irradiation,the icorr of the modified samples increased to 3.48×10^−7 A/cm^*** mechanism is that the local hyperthermia induced the free volume expansion of PLGA,and the increase in intermolecular gap enhanced the penetration of ***,the cytotoxicity study showed that the hybrid coating endowed the Mg-Sr alloy with enhanced biocompatibility.

关键词： Magnesium Ti_(3)C_(2)Mxene Coating Photoresponsive Degradation

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Research on panoramic illumination imaging system based on SURF algorithm 18

Research on panoramic illumination imaging system based on S...

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18th China International Forum on Solid State Lighting and 7th International Forum on Wide Bandgap Semiconductors, SSLChina: IFWS 2021

作者： Wang, Fei Ji, Xiaoxiao Yin, Luqiao Guo, Aiying Zhang, Jianhua Shanghai University School of Microelectronics Shanghai201800 China Shanghai University Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai200072 China School of Mechatronic Engineering and Automation Shanghai University Shanghai200072 China

ISBN: (纸本)9781665495462

Underwater lighting systems and imaging systems are mainly used in underwater pipeline internal inspection, underwater environment information collection, resource detection, etc. This article explores a panoramic lighting imaging system based on an underwater environment. Mainly from the intelligent lighting system, panoramic imaging system, and system integration optimization. The intelligent lighting system mainly explores a high-brightness intelligent lighting device with a high-brightness lighting system. The imaging system mainly works in conjunction with the lighting system. The imaging system mainly collects 250° panoramic picture information and 250° video information for scientific research and other tasks. Provide appropriate information and data. Finally, system integration optimization and joint work are carried out. © 2021 IEEE.

关键词： Imaging systems

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Simulation study on thermal mechanical properties of 4×4 Micro-LED array in flip-chip bonding process 18

Simulation study on thermal mechanical properties of 4×4 Mi...

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18th China International Forum on Solid State Lighting and 7th International Forum on Wide Bandgap Semiconductors, SSLChina: IFWS 2021

作者： Ji, Xiaoxiao Wang, Fei Yin, Luqiao Zhang, Jianhua Shanghai University Ministry of Education Key Laboratory of Advanced Display and System Applications Shanghai200072 China School of Mechatronic Engineering and Automation Shanghai University Shanghai200072 China School of Microelectronics Shanghai University Shanghai201800 China

ISBN: (纸本)9781665495462

With the advent of the Micro-light-emitting diodes, it has become the focus of display and visible light communication research. However, as the LED chip size shrinks, the difficulty of integration increase gradually. Nowadays, the integration of Micro- LEDs in display is still a challenge for commercialization. In this work, we conducted a comparative study by finite element method simulation to reveal the influencing factors of bonding yield. The results show that stress concentrates at the junction of the bumps and electrodes of Micro-LED chips, and the stress concentration at the corner of Micro-LED array is more seriously. By altering the parameters of bumps, such as shapes and materials to reduce the stress and stress concentration. Numerical simulate results provide theoretical basis for reducing stress and stress concentration and optimizing the bump shape. © 2021 IEEE.

关键词： Light emitting diodes

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Light-emitting field-effect transistors with EQE over 20%enabled by a dielectric-quantum dots-dielectric sandwich structure

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Science Bulletin 2022年第5期67卷 529-536,M0004页

作者： Lingmei Kong Jialong Wu Yunguo Li Fan Cao Feijiu Wang Qianqian Wu Piaoyang Shen Chengxi Zhang Yun Luo Lin Wang Lyudmila Turyanska Xingwei Ding Jianhua Zhang Yongbiao Zhao Xuyong Yang Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai UniversityShanghai 200072China CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Henan Key Laboratory of Photovoltaic Materials Henan UniversityKaifeng 475004China Faculty of Engineering University of NottinghamNottingham NG72RDUK Center for Optoelectronic Engineering Research Department of PhysicsSchool of Physics and AstronomyYunnan UniversityKunming 650091China

Emerging quantum dots(QDs)based light-emitting field-effect transistors(QLEFETs)could generate light emission with high color purity and provide facile route to tune optoelectronic properties at a low fabrication *** efforts have been devoted to designing device structure and to understanding the underlying physics,yet the overall performance of QLEFETs remains low due to the charge/exciton loss at the interface and the large band offset of a QD layer with respect to the adjacent carrier transport ***,we report highly efficient QLEFETs with an external quantum efficiency(EQE)of over 20%by employing a dielectric-QDs-dielectric(DQD)sandwich *** DQD structure is used to control the carrier behavior by modulating energy band alignment,thus shifting the exciton recombination zone into the emissive ***,enhanced radiative recombination is achieved by preventing the exciton loss due to presence of surface traps and the luminescence quenching induced by interfacial charge *** DQD sandwiched design presents a new concept to improve the electroluminescence performance of QLEFETs,which can be transferred to other material systems and hence can facilitate exploitation of QDs in a new type of optoelectronic devices.

关键词： Light-emitting field-effect transistors Quantum dots Electroluminescence External quantum efficiency

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Computational Analysis of Quantum Dots as Color Conversion Layer for Micro-LED applications 18

Computational Analysis of Quantum Dots as Color Conversion L...

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18th China International Forum on Solid State Lighting and 7th International Forum on Wide Bandgap Semiconductors, SSLChina: IFWS 2021

作者： Lin, Pengsen Ji, Xiaoxiao Yin, Luqiao Zhang, Jianhua Shanghai University School of Materials Science and Engineering Shanghai200072 China Shanghai University Ministry of Education Key Laboratory of Advanced Display and System Applications Shanghai200072 China School of Mechatronics and Automation Shanghai University Shanghai200072 China

ISBN: (纸本)9781665495462

We propose a simulation scheme for studying quantum dot (QD) light effects of full-color micro-light-emitting-diode (micro-LED) arrays. We have studied the influence of QD thickness and concentration on light efficiency. The results show that the QD concentration and thickness have an impact on the light efficiency. When the thickness of the QD is 5 μm, or the maximum light conversion efficiency can be obtained when the concentration is 0.1 mol/L. By analyzing the light field distribution of different QD thicknesses, the light crosstalk phenomenon is observed. This kind of crosstalk can cause blurry display images and should be avoided. © 2021 IEEE.

关键词： Crosstalk

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Magnesium cationic cue enriched interfacial tissue microenvironment nurtures the osseointegration of gamma-irradiated allograft bone

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Bioactive Materials 2022年第4期7卷 32-47页

作者： Wenhao Wang Jie Shen Yuan Meng Miaoman Ye Shaozhang Lin Qi Zhao Le Wang Kenneth M.C.Cheung Shuilin Wu Yufeng Zheng Xuanyong Liu Paul K.Chu Kelvin W.K.Yeung Zhi-Yong Zhang Translational Research Centre of Regenerative Medicine and 3D Printing of Guangzhou Medical University Guangdong Province Engineering Research Center for Biomedical EngineeringState Key Laboratory of Respiratory DiseaseThe Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhou510150PR China Department of Orthopaedics and Traumatology The University of Hong KongHong Kong999077PR China Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma The University of Hong Kong Shenzhen HospitalShenzhen518053PR China Department of Orthopaedic Surgery The Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhou510150PR China Shenzhen Key Laboratory of Spine Surgery Department of Spine SurgeryPeking University Shenzhen HospitalShenzhen518036PR China Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Key Laboratory of Polymer MaterialsSchool of Materials&EngineeringHubei UniversityWuhan430062PR China Ministry of Education Key Laboratory for Advanced Ceramics and Machining Technology School of Materials Science&EngineeringTianjin UniversityTianjin300352PR China State Key Laboratory for Turbulence and Complex System Department of Materials Science and EngineeringCollage of EngineeringPeking UniversityBeijing100871PR China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050PR China Department of Materials Science and Engineering City University of Hong KongHong Kong999077PR China

Regardless of the advancement of synthetic bone substitutes,allograft-derived bone substitutes still dominate in the orthopaedic circle in the treatments of bone ***,the stringent devitalization process jeopardizes their osseointegration with host bone and therefore prone to long-term ***,improving osseointegration and transplantation efficiency remains *** alteration of bone tissue microenvironment(TME)to facilitate osseointegration has been generally ***,the concept of exerting metal ionic cue in bone TME without compromising the mechanical properties of bone allograft is *** address this concern,an interfacial tissue microenvironment with magnesium cationc cue was tailored onto the gamma-irradiated allograft bone using a customized magnesium-plasma surface *** formation of the Mg cationic cue enriched interfacial tissue microenvironment on allograft bone was verified by the scanning ion-selective electrode *** cellular activities of human TERT-immortalized mesenchymal stem cells on the Mg-enriched grafts were notably *** the animal test,superior osseointegration between Mg-enriched graft and host bone was found,whereas poor integration was observed in the gamma-irradiated controls at 28 days ***,the bony in-growth appeared on magnesium-enriched allograft bone was significant *** mechanism possibly correlates to the up-regulation of integrin receptors in mesenchymal stem cells under modified bone TME that directly orchestrate the initial cell attachment and osteogenic differentiation of mesenchymal stem ***,our findings demonstrate the significance of magnesium cation modified bone allograft that can potentially translate to various orthopaedic procedures requiring bone augmentation.

关键词： Osseointegration Allograft bone Bone tissue microenvironment Bone-implant interface Magnesium

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An Optical Tracking system with Defaced Marker Detection 4

An Optical Tracking System with Defaced Marker Detection

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4th International Conference on Sensors, Signal and Image Processing, SSIP 2021

作者： Qiu, Yu Zheng, Zhao Ou, Ruidi Hu, Xiaoming Fan, Jingfan Yang, Jian Beijing Engineering Research Center Of Mixed Reality And Advanced Display School Of Optics And Photonics Beijing Institute of Technology China Key Laboratory Of Convergence Medical Engineering System And Healthcare Technology School Of Life Science Beijing Institute of Technology China

ISBN: (纸本)9781450385725

Optical tracking systems (OTSs) have been widely used in clinical practice to fulfill the high precision needs of contemporary surgery. The markers that are defaced in the production or surgery reduce the accuracy and tracking range of OTS. This effect was not considered in current products from either industry or academia. In this paper, we propose an OTS which can detect the defaced markers automatically. A stereo camera module is set to track surgical instruments by locating the markers affixed to them. An adaptive threshold approach is suggested to locate the markers. The typical fiducial localization error of our OTS reaches 0.28 mm, which is totally comparable to commercial devices. A defaced marker detection method based on the luminous energy model of OTS is proposed and can be used to recognize the defaced markers regardless of their relative positions to the OTS. © 2021 ACM.

关键词： Stereo image processing

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Instability Mechanism of Phosphomolybdic Acid Solution and its Effect on Organic Solar Cells as a Hole-Transporting Layer

SSRN

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SSRN 2023年

作者： Chen, Guo Qu, Minghao Li, Yaozhao Li, Peng Yang, Xuyong Wei, Bin School of Materials Science and Engineering Shanghai University Shanghai200072 China School of Medicine Shanghai University Shanghai200444 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Yanchang Road 149 Shanghai200072 China

Phosphomolybdic acid (H3PMo12O40, PMA) containing twelve MoO3 units exhibits an efficient hole-transporting property in organic electronics. Low-cost, easy synthesis and high thermal-stability PMA is promising solution-processed hole-transporting material for high efficiency organic solar cells (OSCs). We have studied the degradation mechanism of phosphomolybdic acid in methanol solution that was stored for days, and further investigated its effect on the performance of OSC devices. We found that PMA had been slowly reduced to phosphomolybdic heteropoly blue during the solution storage process. Besides the morphology of the PMA film, its energy level and molybdenum valence which changed with solution storage time were also investigated. The instability of PMA in methanol solution resulted in a significant negative effect on the device performance. Comparing to the PM6:Y6 device based on PMA from pristine solution, the power conversion efficiencies of OSCs with PMA hole transporting layer prepared from solution stored for 8 days and 16 days decreased from 14.69% to 3.01% and 0.58%, respectively. Fortunately, using other stable processing solvent systems instead of methanol for the fabrication of the PMA hole transporting layer has been found as an efficient method to avoid the degration of the device performance. © 2023, The Authors. All rights reserved.

关键词： Stability

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