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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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Intermolecular Charge Transfer for High-Performance Organic Light-Emitting Diodes

Intermolecular Charge Transfer for High-Performance Organic ...

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International Conference on display Technology, 2024

作者： Zhang, Zhen Wang, Zixing Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Yanchang 149 Shanghai 200072 China

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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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Efficient and Stable Perovskite Light-Emitting Diodes Enabled by Oriented Growth Regulation

IEEE Electron Device Letters

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IEEE Electron Device Letters 2025年第6期46卷 952-955页

作者： Zhang, Kun Zhang, Xiaofei Zhang, Chengxi Feng, Jie Kong, Lingmei Wang, Sheng Yang, Yingguo Wang, Lin Yang, Xuyong Shanghai University Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai200072 China Jiangsu University of Science and Technology School of Science Zhenjiang212100 China Zhangjiang Lab Shanghai Advanced Research Institute Shanghai China Fudan University School of Microelectronics Shanghai China

Metal halide perovskites have demonstrated remarkable progress in optoelectronic applications, including solar cells and light-emitting diodes (LEDs). However, the long-term stability of perovskite LEDs (PeLEDs) remains a critical challenge, impeding their practical applications and commercialization. Herein, we regulate the growth kinetics of perovskites in liquid-solid stages by introducing 2,3,4,5, 6-pentafluorophenylphosphonic acid (PFBPA) into the precursor solution. The PFBPA molecules will create a protective passivation layer by coordinating with uncoordinated lead (Pb2+) on the perovskite surface, which regulates the growth of perovskite crystals during the liquid-solid stages and results in the formation of uniform perovskite films with reduced grain size. Moreover, the coordination of PFBPA with Pb2+ also improves the moisture resistance of perovskites, favoring the operational stability of devices. The resulting PeLED devices achieved a maximum brightness of 12426 cd m-2, a peak external quantum efficiency (EQE) of 22.6%, and a remarkable operational stability with a half-lifetime exceeding 1187 hours at initial luminance of 100 cd m-2. © 1980-2012 IEEE.

关键词： Perovskite

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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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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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Linker aggregation engineering of TADF materials to tune carrierbalance for highly efﬁcient organic LEDs with long operationallifetime

Aggregate

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Aggregate 2024年第5期5卷 385-393页

作者： Zhen Zhang Rongrong Xia Ke Wang Youjun Wu Panpan Zang Xuemin Gan Zhangcheng Liao Bin Wei Peng Wu Stefan Bräse Zixing Wang Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai UniversityShanghaiChina Institute of Organic Chemistry Karlsruhe Institute of Technology(KIT)KarlsruheGermany Institute of Biological and Chemical Systems-Functional Molecular Systems(IBCS-FMS) Karlsruhe Institute of Technology(KIT)KarlsruheGermany

Thermally activated delayedﬂuorescence(TADF)molecules are regarded as promis-ing materials for realizing high-performance organic light-emitting diodes(OLEDs).The connecting groups between donor(D)and acceptor(A)units in D–A type TADF molecules could affect the charge transfer and luminescence performance of TADF materials in aggregated *** this work,we design and synthesize four TADF molecules using planar and twisted linkers to connect the aza-azulene donor(D)and triazine acceptor(A).Compared with planar linkers,the twisted ones(Az-NP-T and Az-NN-T)can enhance A–A aggregation interaction between adjacent molecules to balance hole and electron *** a result,highly efﬁcient and stable deep-red top-emission OLEDs with a high electroluminescence efﬁciency of 57.3%and an impressive long operational lifetime(LT_(95)∼30,000 h,initial luminance of 1000 cd m^(-2))are *** study provides a new strategy for designing more efﬁ-cient and stable electroluminescent devices through linker aggregation engineering in donor–acceptor molecules.

关键词： acceptor stacking balanced carrier transfer host materials long device lifetime thermally activated delayedﬂuorescence

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Global optimization of process parameters for low-temperature SiN_(x) based on orthogonal experiments

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Advances in Manufacturing 2023年第2期11卷 181-190页

作者： Lian-Qiao Yang Chi Zhang Wen-Lei Li Guo-He Liu Jia-Qi Wu-Ma Jin-Qiang Liu Jian-Hua Zhang School of Materials Science and Engineering Shanghai UniversityShanghai200444People's Republic of China Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai UniversityShanghai200072People's Republic of China Huawei Technologies Co. LtdShanghai200120People's Republic of China

Low-temperature silicon nitride(SiNx)films deposited by plasma-enhanced chemical vapor deposition(PECVD)have huge application potential in the flexible ***,the applicability of SiNx largely depends on the film’s general properties,including flexibility,deposition rate,residual stress,elastic modulus,fracture strain,dielectric constant,refraction index,*** optimization towards specific application by conventional experiment design needs lots of work due to the interaction of muti quality and process ***,an efficient global optimization approach for the process technology was proposed based on the Taguchi orthogonal experiment method considering muti-factor *** of all,the Taguchi orthogonal experiment design and analysis was used to rank the influences of main process parameters on the quality characteristics,including radio frequency(RF)power,pressure,silane flow rate,ammonia flow rate and nitrogen flow ***,the global optimization approach was carried out utilizing the multi-response optimizer considering the combination target of film formation rate,residual stress,dielectric constant,elastic modulus,fracture strain,refractive ***,the optimal solution of the SiNx film was finally obtained and verified.

关键词： Plasma-enhanced chemical vapor deposition(PECVD) Low-temperature silicon nitride(SiNx) Flexible display Taguchi orthogonal experiment Process optimization

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Highly Efficient Light-emitting Devices Based on Quantum dots/Perovskites

Highly Efficient Light-emitting Devices Based on Quantum dot...

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International Conference on display Technology, ICDT 2022

作者： Wang, Lin Kong, Lingmei Yang, Xuyong Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University 149 Yanchang Road 200072 China

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