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International Conference on display Technology, 2024

作者： Zang, Panpan Wu, Youjun Zhang, Zhen Wu, Peng Wang, Zixing Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Yanchang 149 Shanghai200072 China

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Broadband absorption performance of 3D-printed polyetheretherketone-based electromagnetic wave-absorbing composites

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Chinese Journal of Aeronautics 2024年第8期37卷 547-558页

作者： Lin BAI Nan CHANG Meiying ZHAO Chi HOU Yi CAO Dichen LI School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China Chengdu Aircraft Design and Research Institute Chengdu 610091China Xi’an Key Laboratory of Advanced Structure Design and Application of Aircraft Northwestern Polytechnical UniversityXi’an 710072China State Key Laboratory for Manufacturing System Engineering Xi’an Jiaotong UniversityXi’an 710054China

The rapid development of additive manufacturing technology has offered a new avenue for designing and fabricating high wave-absorbing meta *** this study,the mechanical properties and broadband absorption performance of Poly-Ether-Ether-Ketone(PEEK)–based electromagnetic wave–absorbing composite materials was *** high-performance polymer PEEK was used as the matrix,and the materials with electromagnetic wave loss,such as reduced graphene oxide,Carbonyl Iron(CI),and Flake CI(FCI),were used as *** on the theory of impedance matching,a wave-absorbing structure with a gradual impedance gradient was designed and *** test results showed that at the 2.0–18.0 GHz frequency band,the coverage rate of the effective absorption bandwidth was up to 72.0%,the average optimal reflectivity was–18.09 dB,and the wide-angle absorption range was 0°–30°.The advantages of additive manufacturing technology in designing and fabricating wave-absorbing structures are presented,demonstrating that the technology is an effective method for creating broadband absorbing structures.

关键词： Absorption performance Additive manufacturing Electromagnetic absorption PEEK composite materials Gradual structure Broadband absorption

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High efficiency and dynamic modulation of nonlinear metasurfaces

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Light(Science & applications) 2024年第11期13卷 2424-2426页

作者： Ruizhe Zhao Lingling Huang Beijing Engineering Research Center of Mixed Reality and Advanced Display MIIT Key Laboratory of Photoelectronic Imaging Technology and System of Ministry of Education of ChinaSchool of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China

Metasurfaces have facilitated numerous innovative applications in the scope of nonlinear ***,dynamically tuning the nonlinear response at the pixel level is very *** work proposed a novel method to electrically manipulate the local amplitude and phase of third-harmonics generation(THG)by integrating the giant nonlinear responses resulting from intersubband transitions of multiple quantum wells(MQW)with plasmonic *** demonstrated method may pave the way to realize nonlinear optical elements with versatile functionalities by electrically tuning and promoting the advancements of innovative applications such as lidar,3D displays,optical encryption,optical computing,and so on.

关键词： nonlinear harmonics integrating

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A novel Eu^(3+)-doped phosphor-in-glass for WLEDs and the effect of borophosphate matrix

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Journal of Rare Earths 2023年第2期41卷 190-199页

作者： Teng Ma Haohong Chen Luqiao Yin Fang Lei Ying Shi Jianjun Xie Lei Zhang Lingcong Fan School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Key Laboratory of Transparent Opto-functional Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Key Laboratory of Advanced Display and System Applications Shanghai UniversityShanghai 200072China

Phosphor-in-glass(PiG)is a potential color convertor for high power WLEDs.A novel glass matrix with advanced performance is still a ***,Eu^(3+)doped glass matrix has attracted much consideration mainly due to its red compensation.A new borophosphate matrix to realize Eu^(3+)red light was designed in the Na_(2)O-ZnO-P_(2)O_(5)-B_(2)O_(3)-Eu_(2)O_(3)***,a series of PiGs composed of different concentrations of Y3Al5O12:Ce phosphor and the matrix were also fabricated by *** crystallization of Eu^(3+)based phosphate offers a novel red emission quenching apart from normal concentration quenching in the glass *** direct energy transfer but only little reabso rption occurs between Eu^(3+)and Ce^(3+)*** Ce^(3+)concentration effect is obvious on the electroluminescent *** optimized color rendering index of 79.7,the CIE coordinates near natural white and the range of CCT from 3943 to 6097 K were obtained for the packaged white light emitting diodes(WLEDs)together with the excellent CCT stability higher than about 97.5%and the quadruple thermal conductivity than that of silicon *** work implies borophosphate glass based PiGs with fine transparence and energy conversion efficiency are promising for excellent WLEDs,while the LED by using the PiG sample without any yellow phosphor doped is of high color purity and has a potential use as the 465 nm blue source.

关键词： Phosphor-in-glass Eu^(3+)ion Borophosphate glass WLEDs YAG:Ce Rare earths

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Efficient Red Sn-Based Perovskite Light Emitting Diodes by a Competitive Antioxidation Strategy

IEEE Electron Device Letters

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IEEE Electron Device Letters 2025年第6期46卷 948-951页

作者： Gong, Yingqun Shi, Yuxin Huo, Sitao Wang, Lin Zhang, Xiaofei Kong, Lingmei Wang, Sheng Yang, Yingguo Yang, Xuyong Shanghai University Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai200072 China Seoul National University Department of Materials Science and Engineering Seoul08826 Korea Republic of Shanghai Tianma Micro-Electronics Company Ltd. Shanghai110044 China Zhangjiang Laboratory Shanghai200031 China Fudan University School of Microelectronics Shanghai200433 China

Tin (Sn)-based perovskite light-emitting diodes (PeLEDs) have emerged as a promising candidate for next-generation displays because of their eco-friendliness, exceptional optoelectronic properties, and cost-effective solution processability. However, their electroluminescence performance still lags behind their lead (Pb) counterparts, primarily due to the undesired Sn2+ oxidation to Sn4+ and the rapid crystallization of Sn-based perovskite, resulting in high defect density as well as poor film quality. Herein, we reported a competitive antioxidation strategy by utilizing a phosphorus ylide, namely (triphenylphosphoranilidene) acetaldehyde (TPPA), to suppress the oxidation of Sn2+ and regulate the growth kinetics, simultaneously. The TPPA with highly active polar phosphorus-carbon bonds can be oxidized prior to Sn2+, and their large steric hindrance can slow down the crystallization process of tin-based perovskite. Moreover, the main product from the oxidation reaction, namely triphenylphosphine oxide (TPPO), can further passivate defects by coordinating with SnI6 octahedra. The resulting Sn-based perovskite film exhibits enhanced optical properties and uniform, dense morphology. Leveraging these improvements, the optimized PeLED delivers pure-red light emission with Commission Internationale de L’Eclairage (CIE) color coordinates of (0.69, 0.30), an external quantum efficiency (EQE) of 8.1% and maximum luminance of 672 cd m−2. This work provides a facile route to enhance the overall performance of Sn-based PeLEDs. © 1980-2012 IEEE.

关键词： Perovskite

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Recent advances in flexible noninvasive electrodes for surface electromyography acquisition

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npj Flexible Electronics 2023年第1期7卷 139-164页

作者： Lian Cheng Jun Li Aiying Guo Jianhua Zhang School of Microelectronics Shanghai University201800 ShanghaiChina Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai University200072 ShanghaiPeople’s Republic of China

Surface electromyography(sEMG)is used to detect and analyze human muscle ***,flexible noninvasive electrodes(FNEs)have emerged to extract bioelectrical signals from individual *** FNEs to be deployed as a central component of physiological signal acquisition,the quest for elevated signal-to-noise ratio and density is compelling owing to the small amplitude of ***,we review recent progress in FNEs for sEMG *** summarize the needed properties of FNEs,compare the differences between passive electrodes and active electrodes and exemplify applications of *** also conclude the current challenges and future opportunities in sEMG acquisition.

关键词： potential. electrodes surface

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Simulation of Bonding and Reliability for Micro-LED Array Based on Copper Pillar Bump 21

Simulation of Bonding and Reliability for Micro-LED Array Ba...

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21st China International Forum on Solid State Lighting and 10th International Forum on Wide Bandgap Semiconductors, SSLCHINA: IFWS 2024

作者： Fu, Hao Yang, Zhu Meng, Xinhui Fan, Hong Lu, Xiuzhen Yin, Luqiao Zhang, Jianhua School of Microelectronics Shanghai University Shanghai201800 China Key Laboratory of Advanced Display and System Applications Shanghai University Ministry of Education Shanghai2000072 China

ISBN: (纸本)9798331541149

With the rapid development of automotive electronics and near-eye displays, more stringent requirements have appeared for the heterogeneous integration technology of Micro-LED. Copper pillar bumps, which offer enhanced electrical conductivity, thermal conductivity, and mechanical properties, can meet the demands for higher density and smaller size packaging in Micro-LED array applications. In Micro-LED system integration, bonding plays a critical role as the bonding conditions significantly influence the performance and reliability of Micro-LED. Consequently, it is essential to investigate the effects of bonding conditions on Micro-LED devices to ensure optimal performance and reliability of copper pillar bumps. A model with copper pillar bumps and Micro-LED chips was presented with a bonding simulation and parameter analysis performed in this paper. The finite element method was utilized to examine the thermal-mechanical coupling of one quarter of a 5×5 Micro-LED array model in this paper. The stress and deformation of the bumps during the bonding process and the effects of bonding conditions on the stress and deformation of the bumps was investigates. ©2024 IEEE.

关键词： bonding copper pillar bump Micro-LED orthogonal test

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Low subthreshold swing enables high synaptic weight gains based on channel-side gate dependent electrolyte transistors FET design 21

Low subthreshold swing enables high synaptic weight gains ba...

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21st China International Forum on Solid State Lighting and 10th International Forum on Wide Bandgap Semiconductors, SSLCHINA: IFWS 2024

作者： Gong, Qiming Wang, Fei Zheng, Hao Li, Mengjiao School of Microelectronics Shanghai University Shanghai200444 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai200072 China

ISBN: (纸本)9798331541149

With the development of IoT and AI technologies, brain-like synaptic devices with precise weight modulation of synaptic plasticity and controllable preparation are of great significance for developing neuromorphic computing and intelligent sensing technologies. In this paper, we design a series of side-gate electrolyte transistors with varying gate-channel distances and systematically examine the structural design effect on synaptic weight modulation. A synaptic transistor device with an ultra-low subthreshold swing of 89.8 mV/dec has been successfully achieved by optimizing the gate-channel design. Additionally, Further characterizations of the short-term synaptic plasticity and long-term synaptic plasticity of synaptic transistors uncover the flexible modulation of the gate-channel distance-dependent synaptic weight gain behaviors, which span from as low as 6.1 to as high as 87.5 under 50 successive stimuli. The results of this work provide a reliable solution for the design and preparation of high-performance synaptic devices and lay the foundation for high-precision neural networks and intelligent sensing technologies. ©2024 IEEE.

关键词： Integrated circuit design

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Oxide Semiconductor Thin-Film Transistors with High Mobility and Stability

Oxide Semiconductor Thin-Film Transistors with High Mobility...

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International Conference on display Technology, 2024

作者： Yan, Guowen Wang, Dejian Sun, Xiaoqi Wen, Pan Peng, Cong Xu, Lin Ding, Lidong Chen, Fa-Hsyang Li, Xifeng Xi, Wangfeng Xing, Rubo Li, Junfeng Hefei Visionox Technology Co. Ltd Anhui Hefei230000 China Kunshan Govisionox Optoelectronics Co. Ltd Jiangsu Suzhou215301 China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai200072 China

This paper presents a oxide thin film transistors with high mobility by a new fabricate method. The high mobility TFT with ultra-high mobility of 55cm2/Vs has been obtained, and the PBTS and NBTS has also been optimiz... 详细信息

关键词： Thin film transistors

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Three-dimensional MXene/carbon nanotube composite electrodes in flexible 64-channel arrays for noninvasive electromyography signal acquisition

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Science China Materials 2024年第9期67卷 2977-2984页

作者： Lian Cheng Aiying Guo Jun Li Mengjiao Li Qiang Lei Wen Xu Xiaolin Guo Jianhua Zhang School of Microelectronics Shanghai UniversityShanghai201800China Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai UniversityShanghai200072China

Non-invasive surface electromyography(sEMG)electrodes have vast potential in fields such as healthcare,human-computer interaction,and entertainment,providing diverse information related to electromyographic ***-invasive sEMG electrodes reduce user risks but gather sEMG signals of lower quality compared to invasive ***,various advanced electrode materials have been developed for detecting physiological electrical signals,but the majority of them are single channel ***,we report 64-channel three-dimensional(3D)Ti_(3)C_(2)MXene/CNT composite electrodes fabricated using bonding-driven self-assembly *** electrodes are characterized by low skin-electrode contact impedance and a high signal-to-noise ratio(SNR)for collection of EMG *** electrode arrays exhibit remarkable flexibility,conforming seamlessly to the skin’s ***,the skin-electrode contact impedance of 3D Ti_(3)C_(2)MXene/CNT electrodes decreases by 10-fold compared to Ag/AgCl gel electrodes at a frequency of 100 ***,when collecting sEMG signals from the arm,the prepared Ti_(3)C_(2)MXene/CNT electrodes exhibit lower baseline noise and higher SNR compared to Ag/AgCl gel ***,Ti_(3)C_(2)MXene/CNT electrodes can collect sEMG signals of different hand gestures,while maintaining a high SNR(∼25 dB).By combining machine learning,sEMG signals from different gestures can be identified with a recognition rate exceeding 90%.The exceptional performance and scalability of these 3D Ti_(3)C_(2)MXene/CNT electrodes indicate a promising future for shaping electronic skin and wearable device technologies.

关键词： electrodes surface electromyography skin-contact impedance Ti_(3)C_(2)MXenes CNTs

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