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Molecular exchange and passivation at interface afford high-performing perovskite solar cells with efficiency over 24%

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Journal of Energy Chemistry 2023年第7期82卷 219-227,I0005页

作者： Jianjun Sun Wangchao Chen Yingke Ren Yunjuan Niu Zhiqian Yang Li'e Mo Yang Huang Zhaoqian Li Hong Zhang Linhua Hu Key Laboratory of Photovoltaic and Energy Conservation Materials Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031AnhuiChina School of Chemistry and Chemical Engineering Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of TechnologyHefei 230009AnhuiChina College of Science Hebei University of Science and TechnologyShijiazhuang 050018HebeiChina Hebei Computational Optical Imaging and Photoelectric Detection Technology Innovation Center Hebei International Joint Research Center for Computational Optical Imaging and Intelligent SensingSchool of Mathematics and Physics Science and EngineeringHebei University of EngineeringHandan 056038HebeiChina University of Science and Technology of Chin1 Anhui 230026HefeiChina

The interface is crucial for perovskite solar cells(PSCs).However,voids at interfaces induced by the trapped hygroscopic dimethyl sulfoxide(DMSO)can reduce charge extraction and accelerate the film degradation,seriously damaging the efficiency and *** this work,4,4’-dinonyl-2,2’-dipyridine(DN-DP),a Lewis base with long alkyl chains is introduced to solve this *** calculated and experimental results confirm that the dipyridyl group on DN-DP can more strongly coordinate with Pb^(2+)than that of the S=O group on *** strong coordination effect plays a crucial role in removing the DMSO-based adduct and reducing the formation of *** to the electron-donating properties of pyridine,the existence of DN-DP in the perovskite film can passivate the defects and optimize the energy level alignment of the perovskite *** open-circuit voltage(VOC)of the DN-DP-based PSC is improved from 1.107 V(control device)to 1.153 V,giving rise to a power conversion efficiency(PCE)of24.02%.Furthermore,benefiting from the moisture resistance stemming from the hydrophobic nonyl group,the PCE retains 90.4%of the initial performance after 1000 h of storage in the ambient condition.

关键词： Perovskite solar cell Anti-solvent 4 4′-Dinonyl-2 2′-dipyridine Optimized interfaceStability

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Highly Sensitive Lithium Niobate-Based Saw Strain Sensor With on-Chip Temperature Compensation

Highly Sensitive Lithium Niobate-Based Saw Strain Sensor Wit...

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IEEE International Conference on Micro Electro Mechanical Systems

作者： Chunlong Cheng Jingwen Yang Xiaoru Li Tong Tong Huahuang Luo Zekai Meng Qingqing Ke School of Microelectronics Science and Technology Sun Yat-sen University Zhuhai China Zhuhai Key Laboratory of Micro-Nano Sensing Technology and Intelligent Detection Sun Yat-sen University Zhuhai China

ISBN: (数字)9798331508890

ISBN: (纸本)9798331508906

We reported a surface acoustic wave (SAW) strain sensor based on 128° Y-cut lithium niobate, which was capable of exciting three modes. Based on these multiple modes, an on-chip temperature compensation scheme was therefore proposed. We conducted tests from 25 °C to 120 °C, and within 0-800 με, the maximum relative error between measured strain and reference strain was only 5.8%. Additionally, after the beat frequency, linearity of strain sensing was enhanced compared to a single mode, and sensitivity was 284.07 Hz/με, being two orders of magnitude higher than that of the SAW strain sensors reported in the literature with on-chip temperature compensation.

关键词： Temperature sensors Temperature measurement Temperature distribution Sensitivity Surface acoustic waves Linearity Capacitive sensors System-on-chip Sensors Strain

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Review of Non-Destructive Testing Methods for Defects in Insulating Polymers

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CSEE Journal of Power and Energy Systems 2025年第3期11卷 1380-1397页

作者： Liming Wang Yanxin Tu Bin Cao Yuhao Liu Hongwei Mei Lishuai Liu Fanghui Yin Institute of Advanced Technologies in Energy and Electrical Engineering (IAT3E) Shenzhen International Graduate School Tsinghua University Shenzhen China College of Electrical Engineering and Automation Fuzhou University Fuzhou China Shanghai Key Laboratory of Intelligent Sensing and Detection Technology School of Mechanical and Power Engineering East China University of Science and Technology Shanghai China

In the field of power systems, insulating polymers have been found to have extensive applications due to their outstanding properties. However, these materials are susceptible to defects arising from various factors during production and operation, which may progress and potentially lead to safety incidents. This paper comprehensively reviews non-destructive testing (NDT) techniques for insulating polymers. Based on the physical principles underlying these methods, they are categorized into electrical testing methods, non-electrical passive testing methods, and non-electrical active testing methods. The paper offers a retrospective assessment of the applications of these methods in insulating polymers. Finally, evaluation of the applicability, advantages, and limitations of these diverse methods is systematically conducted, aiming to facilitate the targeted selection of the optimal NDT method in engineering applications.

关键词： Insulation Plastics Testing Insulators Temperature measurement Pulse measurements Power transformer insulation Partial discharges Feature extraction Water pollution

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Wearable and interactive multicolored photochromic fiber display

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Light(Science & Applications) 2024年第3期13卷 454-465页

作者： Pan Li Yuwei Wang Xiaoxian He Yuyang Cui Jingyu Ouyang Ju Ouyang Zicheng He Jiayu Hu Xiaojuan Liu Hang Wei Yu Wang Xiaoling Lu Qian Ji Xinyuan Cai Li Liu Chong Hou Ning Zhou Shaowu Pan Xiangru Wang Huamin Zhou Cheng-Wei Qiu Yan-Qing Lu Guangming Tao State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and Engineering and Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Vascular Aging(HUST) Ministry of EducationWuhan 430030China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and ManipulationCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China School of Performing Arts Wuhan Conservatory of MusicWuhan 430060China School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China School of Architecture and Urban Planning Huazhong University of Science and TechnologyWuhan 430074China School of Fashion Beijing Institute of Fashion TechnologyBeijing 100029China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Tongji Medical College Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Endowing flexible and adaptable fiber devices with light-emitting capabilities has the potential to revolutionize the current design philosophy of intelligent,wearable interactive ***,significant challenges remain in developing fiber devices when it comes to achieving uniform and customizable light effects while utilizing lightweight ***,we introduce a mass-produced,wearable,and interactive photochromic fiber that provides uniform multicolored light *** designed independent waveguides inside the fiber to maintain total internal reflection of light as it traverses the *** impact of excessive light leakage on the overall illuminance can be reduced by utilizing the saturable absorption effect of fluorescent materials to ensure light emission uniformity along the transmission *** addition,we coupled various fluorescent composite materials inside the fiber to achieve artificially controllable spectral radiation of multiple color systems in a single *** prepared fibers on mass-produced kilometer-long using the thermal drawing *** fibers can be directly integrated into daily wearable devices or clothing in various patterns and combined with other signal input components to control and display patterns as *** work provides a new perspective and inspiration to the existing field of fiber display interaction,paving the way for future human–machine integration.

关键词： fiber interactive colored

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MAX-DOAS and in-situ measurements of aerosols and trace gases over Dongying,China:Insight into ozone formation sensitivity based on secondary HCHO

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Journal of Environmental Sciences 2024年第1期135卷 656-668页

作者： Xiaojun Zheng Zeeshan Javed Cheng Liu Aimon Tanvir Osama Sandhu Haoran Liu Xiangguang Ji Chengzhi Xing Hua Lin Daolin Du Institute of Environment and Ecology School of the Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013China Department of Precision Machinery and Precision Instrumentation University of Science and Technology of ChinaHefei 230026China Key Laboratory of Environmental Optics&Technology Anhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes University of Science and Technology of ChinaHefei 230026China Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Department of Environmental Science and EngineeringFudan UniversityShanghai 200433China National Agromet Center Pakistan Meteorological DepartmentIslamabad 44000Pakistan Institute of Physical Science and Information Technology Anhui UniversityHefei 230601China Information Materials and Intelligent Sensing Laboratory of Anhui Province Anhui UniversityHefei 230601China School of Environmental Science and Optoelectronic Technology University of Science and Technology of ChinaHefei 230026China

This study presents a comprehensive overview of the atmospheric pollutants including Sulfur dioxide(SO_(2)),Nitrogen dioxide(NO_(2)),Formaldehyde(HCHO),Particulate Matter PM;PM_(10):diameter≤10μm,and PM_(2.5):diameter≤2.5μm,and Ozone(O_(3)),over Dongying(Shandong Province)from March-April 2018 and September-October 2019 by employing ground-based Multiple Axis Differential Optical Absorption Spectroscopy(MAX-DOAS)observations along with the in-situ measurements attained by the national air quality monitoring *** concentrations of SO_(2)and NO_(2)were under the acceptable level,while both PM_(2.5),and PM_(10)were higher than the safe levels as prescribed by national and international air quality *** results depict that 21%of the total observation days were found to be complex polluted days(PM_(2.5)>35μg/m^(3) and O_(3)>160μg/m^(3)).The secondary HCHO was used for accurate analysis of O_(3)sensitivity.A difference of 11.40%and 10%during March-April 2018 and September-October 2019 respectively in O_(3)sensitivity was found between HCHO_(total)/NO_(2)and HCHO_(sec)/NO_(2).The results indicate that primary HCHO have significant contribution in HCHO.O_(3)formation predominantly remained to be in VOC-limited and transitional regime during March-April 2018 and September-October 2019 in *** results imply that concurrent control of both NO_(x) and VOCs would benefit in ozone ***,the criteria pollutants(PM,SO_(2),and NO_(2))depicted strong correlations with each other except for O_(3)for which weak correlation coefficient was obtained with all the *** study will prove to be baseline for designing of air pollution control strategies.

关键词： MAX-DOAS Trace gases Ozone sensitivity Secondary HCHO Complex Pollution

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Research on Traffic Inspection Method in Urban Irregular Area Based on Multi-UAV 23

Research on Traffic Inspection Method in Urban Irregular Are...

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23rd COTA International Conference of Transportation Professionals: Emerging Data-Driven Sustainable Technological Innovation in Transportation, CICTP 2023

作者： Yue, Guanghua Du, Wentao Yue, Jiangfeng Liu, Chenglong Du, Yuchuan Key Laboratory of Road and Traffic Engineering of Ministry of Education Tongji Univ. Shanghai China Henan Wanli Transportation Technology Group Co. Ltd. Xuchang China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province Univ. of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9780784485040

ISBN: (纸本)9780784485040

When multiple unmanned aerial vehicles (UAV) patrol urban traffic status, the complex road network, and high buildings lead to irregularities in the airspace above. In addition, the communication signals and positioning systems between multi-UAV are often easily blocked by buildings and plants. Traditional multi-UAV path planning algorithms cannot guarantee mission reliability. In this paper, we take the actual typical scene of urban environmental traffic inspection as an example and propose a distributed weak-sensing UAV swarm scanning coverage based on the action mechanism of neighboring members in the cluster, combined with the virtual artificial potential field method to constrain the consistent behavior system. This method can realize the adaptive scanning coverage of irregular areas by multi-UAV coordination under limited communication in the urban environment and avoid collisions between UAVs and buildings. It has a good application sweep coverage in urban traffic inspection in the future. © ASCE.

关键词： Inspection

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In-Situ Saw/Baw Sensors Based on P(VDF-TRFE) for Strain and Temperature Measurement

In-Situ Saw/Baw Sensors Based on P(VDF-TRFE) for Strain and ...

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IEEE International Conference on Micro Electro Mechanical Systems

作者： Xiaoru Li Chunlong Cheng Jingwen Yang Guoxiang Zhang Zihan Lu Xuefei Yan Huahuang Luo Zekai Meng Qingqing Ke School of Microelectronics Science and Technology Sun Yat-sen University Zhuhai China Zhuhai Key Laboratory of Micro-Nano Sensing Technology and Intelligent Detection Sun Yat-sen University Zhuhai China

ISBN: (数字)9798331508890

ISBN: (纸本)9798331508906

The paper presents an in-situ Surface Acoustic Wave (SAW) / Bulk Acoustic Wave (BAW) sensor based on P(VDF-TrFE), which is directly integrated onto a metal surface. Characterization results confirm that the P(VDF-TrFE) film is well-suited for fabricating SAW/BAW sensors. The sensor excites multiple BAW modes, enabling temperature sensing with a maximum temperature coefficient of frequency (TCF) of 738 ppm/°C in BAW mode 3, which is six times higher than the reported in-situ BAW devices. In SAW mode 1, the TCF reaches 745 ppm/°C, almost eight times greater than the previous in-situ SAW devices. Moreover, the SAW mode 1 exhibits good linearity across a large strain measurement range of 7000 με, with a sensitivity of 146 Hz/με, surpassing the strain range of the reported in-situ SAW devices by nearly fourfold. Overall, the developed in-situ SAW/BAW sensor features outstanding performance in both temperature and strain sensing, which demonstrates the significant potential for multifunctional and multimodal sensing applications in structural health monitoring (SHM).

关键词： Temperature sensors Temperature measurement Micromechanical devices Sensitivity Multimodal sensors Surface acoustic waves Surface acoustic wave devices Strain measurement Sensors Strain

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Fruit detection research based on near-infrared spectroscopy and lightweight neural network 5

Fruit detection research based on near-infrared spectroscopy...

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5th International Conference on Computer Information Science and Application technology, CISAT 2022

作者： Zhang, Jinfu Tang, Bin Wang, Jianxu Cai, Linfeng Miao, Junfeng Chen, Qing Liu, Hang Mingfu, Zhao Chongqing Key Laboratory of Optical Fiber Sensing and Photoelectric Detection Chongqing400054 China Intelligent Optical Fiber Sensing Technology Chongqing University Engineering Research Center Chongqing400054 China School of Electrical and Electronic Engineering Chongqing University of Technology Chongqing400054 China

ISBN: (纸本)9781510660076

Spectroscopy is an important method in the field of nondestructive testing of fruits, and spectral pretreatment and feature screening are the difficulties and keys, which have a greater impact on the accuracy of the model, so this paper aims to use the lightweight neural network (MoblieNetV1) combined with near-infrared spectroscopy to improve the accuracy and stability of the model, reduce its computational amount, and verify its feasibility and effect. First, the fruit dataset is classified and labeled, and apples, pears, citrus, and peaches are labeled as 1, 2, 3, and 4, respectively, and then the sample spectra are put into model training in batches. MoblieNetV1 extracts features through the bottom layer, and then further extracts features at a deeper level, and finally obtains the classification of the target. Experimental results show that the moblieNetV1 used has achieved a high recognition accuracy, which is more suitable for use in the field of spectral detection than other neural networks, and avoids the cumbersome process of manually extracting features. © 2022 SPIE.

关键词： Near infrared spectroscopy

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A Novel Design for SRAM Bitcell with 3-Complementary-FETs

arXiv

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arXiv 2025年

作者： Cheng, Xiaoyu Hu, Yangyang Miao, Tianci Liu, Wenbo Zheng, Qihang Liu, Yisi Liang, Jie Chen, Liang Guo, Aiying Yin, Luqiao Zhang, Jianhua Ren, Kailin School of Microelectronics Shanghai University Shanghai200444 China Shanghai Collaborative Innovation Center of Intelligent Sensing Chip Technology Shanghai University Shanghai200444 China Shanghai Key Laboratory of Chips and Systems for Intelligent Connected Vehicle Shanghai University Shanghai200444 China

The complementary field-effect transistors (CFETs), featuring vertically stacked n/p-FETs, enhance integration density and significantly reduce the area of standard cells such as static random-access memory (SRAM). However, the advantage of area scaling by utilizing the CFET structure is hindered by the imbalance in the number of N/P transistors (normally 4N/2P) within the SRAM standard cell. In this article, a novel design that achieves a 6T-SRAM configuration composed of three sets of CFETs is proposed, by stacking two n-FET pass-gate (PG) transistors vertically through a CFET structure. The channel doping concentration, as well as the number of top and bottom nanosheets (NS) are optimized using TCAD simulations, concluding that junctionless accumulation mode (JAM) device instead of inversion mode (IM) device is a better choice for PG and pull-down (PD) transistors in SRAM. An area reduction of 37% in the SRAM standard cell layout is achieved compared with the conventional SRAM layout based on CFET. The predicted performance of the 3-CFET SRAM with n-type channel doping of 1×1015 cm-3 and NS number of '1B4T' demonstrates the greatest overall performances in write margin (349.60 mV) and write delay (54.4 ps). This work provides a promising strategy for the SRAM design in the CFET framework. Copyright © 2025, The Authors. All rights reserved.

关键词： Static random access storage

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A Novel Pulse Width Modulation Strategy Used for Permanent Magnet Synchronous Motor Drives 10

A Novel Pulse Width Modulation Strategy Used for Permanent M...

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10th IEEE International Power Electronics and Motion Control Conference, IPEMC 2024 ECCE Asia

作者： Xue, Yuxiang Li, Hui Wu, Yingzhe Wang, Lisheng Zhang, Hengbin University of Electronic Science and Technology of China School of Aeronautics and Astronautics Chengdu China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province Chengdu China Shanghai Gatek Automotive Electronics Company Ltd. Beijing Research and Development Center Beijing China

ISBN: (纸本)9798350351330

The pulse width modulation (PWM) technique is extensively employed in permanent magnet synchronous motor (PMSM) drives, which is classified into continuous PWM and discontinuous PWM (DPWM). The continuous PWM is more prevalent in PMSM drives, however, its performance diminishes notably in the high modulation index region compared to DPWM. In this paper, a novel DPWM method is proposed to enhance PMSM performance in the high modulation index region. According to the simulation and experiment results, it is demonstrated that the proposed DPWM method exhibits reduced high-order harmonics in this region compared to other DPWM strategies like DPWMMIN, DPWMMAX, and DPWM3. Additionally, a mixed PWM strategy is introduced and implemented in 12-V PMSM drives. The relative results indicate that space vector PWM (SVPWM) is utilized in the low modulation index region and transitions to the novel DPWM in the high modulation index region, resulting in reduced harmonics throughout the control process. © 2024 IEEE.

关键词： Pulse width modulation

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