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Julolidine functionalized benzimidazoline-doped fullerene derivatives for efficient and stable perovskite solar cells

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Interdisciplinary materials 2024年第3期3卷 369-379页

作者： Yanqing Zhu Chenglong Li JiaHui Chen Yuxi Zhang Jianfeng Lu Min Hu Wangnan Li Fuzhi Huang Yi-Bing Cheng Hyesung Park Shengqiang Xiao State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhanChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanChina School of Electronic and Electrical Engineering Hubei Province Engineering Research Centre for Intelligent Micro-Nano Medical Equipment and Key TechnologiesWuhan Textile UniversityWuhanChina Hubei Key Laboratory of Low Dimensional Optoelectronic Material and Devices Hubei University of Arts and ScienceXiangyangHubeiChina KU-KIST Graduate School of Converging Science and Technology Korea UniversitySeoulRepublic of Korea Department of Integrative Energy Engineering Korea UniversitySeoulRepublic of Korea Hubei Key Laboratory of Fuel Cell WuhanChina

Fullerene derivatives are highly attractive materials in solar cells,organic thermoelectrics,and other ***,the intrinsic low electron mobility and electrical conductivity restrict their potential device performance,such as perovskite solar cells(PSCs).Herein,we successfully enhanced the electric properties and morphology of phenyl-C61-butyric acid methyl ester(PCBM)by n-doping it with a benzimidazoline derivative,9-(1,3-dimethyl-2,3-dihydro-1H-benzoimidazol-2-yl)-julolidine(JLBI-H)via a solution *** found the n-doping can not only improve the conductivity and optimize the band alignment but also enable the PCBM to have a constantly strong charge extraction ability in a wide temperature from 173 to 373 K,which guarantees a stable photovoltaic performance of the corresponding PSCs under a wide range of operating *** the JLBI-H-doped PCBM,we improved the efficiency from 17.9%to 19.8%,along with enhanced stability of the nonencapsulated devices following the aging protocol of ISOS-D-1.

关键词： charge extraction electron mobility n-doping PSCs wide operation temperature

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Pressure-driven metallization with significant changes of structural and photoelectric properties in two-dimensional EuSbTe_(3)

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Rare Metals 2024年第11期43卷 5943-5952页

作者： Zhi-Kai Zhu Zhong-Yang Li Zhen Qin Yi-Ming Wang Dong Wang Xiao-Hui Zeng Fu-Yang Liu Hong-Liang Dong Qing-Yang Hu Ling-Ping Kong Hao-Zhe Liu Wen-Ge Yang Yan-Feng Guo Shuai Yan Xuan Fang Wei He Gang Liu State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materialsand School of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China Center for High Pressure Science and Technology Advanced Research(HPSTAR) Shanghai 201203China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Poly Technologies INCBeijing 100010China ShanghaiTech Laboratory for Topological Physics ShanghaiTech UniversityShanghai 201210China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201204China Sch Sci State Key Lab High Power Semicond LasersChangchun University Science and TechnologyChangchun 130022China Shanghai Key Laboratory of Material Frontiers Research in Extreme Environments(MFree) Shanghai Advanced Research in Physical Sciences(SHARPS)Shanghai 201203China

Two-dimensional materials are widely considered to be highly promising for the development of *** improve the performance of these devices,researchers often employ techniques such as defect ***,pressure is employed as a clean and novel means to manipulate the structural and physical properties of EuSbTe_(3),an emerging two-dimensional *** experimental results demonstrate that the structural phase transformation of EuSbTe_(3)occurs under pressure,with an increase in infrared reflectivity,a band gap closure,and a metallization at *** with X-ray diffraction(XRD)and Raman characterizations,it is evident that the pressure-driven transition from semiconductor Pmmn phase to metallic Cmcm phase causes the disappearance of the charge density ***,at a mild pressure,approximately 2 GPa,the maximum photocurrent of EuSbTe_(3)is three times higher than that at ambient condition,suggesting an untapped potential for various practical applications.

关键词： Pressure Phase transition Metallization Photoresponse Two-dimensional(2D)

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Hierarchical Structured Fabrics with Enhanced Pressure Sensing Performance Based on Orientated Growth of Functional Bacterial Cellulose

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advanced Fiber materials 2024年第5期6卷 1554-1568页

作者： Chong Gao Yingcun Liu Zongxue Gu Juan Li Yue Sun Wei Li Keshuai Liu Duo Xu Bin Yu Weilin Xu College of Textile Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200People’s Republic of China College of Textile and Clothing Engineering Soochow UniversitySuzhou 215123People’s Republic of China

Wearable electronics based on natural biomaterials,such as bacterial cellulose(BC),have shown promise for a variety of healthcare and human-computer interaction ***,current BC-based pressure sensors have an inherent limi-tation,which is the two-dimensional rigid structures and limited compressibility of BC restrict the sensitivity and working range for pressure ***,we propose a strategy for fabricating BC/polypyrrole/spacer fabric(BPSF)pressure sensors with a hierarchical structure constructed by integrating conductive BC nanonetwork into a compressible fabric frame via the in situ biofermentation *** hierarchical structure design includes a cross-scale network from the nanoscale BC sensor networks to the macroscopic three-dimensional compressible fabric sensor network,which significantly improves the working range(0-300 kPa)and sensitivity(40.62 kPa-1)of *** this unique structural design,the sensor also achieves a high fatigue life(~5000 cycles),wearability,and reproducibility even after several washing and abrasion ***,a flexible and wearable electronic textile featuring an n×n sensing matrix was developed by constructing BPSF arrays,allowing for the precise control of machines and weight distribution *** empirical insights are valuable for the biofabrication and textile structure design of wearable devices toward the realization of highly intuitive human-machine interfaces.

关键词： Bacterial cellulose textile In situ biofermentation Hierarchical structure Pressure sensing

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Nonautonomous Breather and Rogue Wave in Spinor Bose–Einstein Condensates with Space-Time Modulated Potentials

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Chinese Physics Letters 2023年第4期40卷 6-10页

作者：丁崔崔周勤徐四六 Houria Triki Mohammad Mirzazadeh 刘文军 Research Group of Nonlinear Optical Science and Technology School of Mathematical and Physical SciencesWuhan Textile UniversityWuhan 430200China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China School of Biomedical Engineering and Medical Imaging Xianning Medical CollegeHubei University of Science and TechnologyXianning 437100China Radiation Physics Laboratory Department of PhysicsFaculty of SciencesBadji Mokhtar UniversityP.O.Box 1223000 AnnabaAlgeria Department of Engineering Sciences Faculty of Technology and EngineeringEast of GuilanUniversity of GuilanRudsar-VajargahIran State Key Laboratory of Information Photonics and Optical Communications School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China

To study controlled evolution of nonautonomous matter-wave breathers and rogue waves in spinor Bose–Einstein condensates with spatiotemporal modulation,we focus on a system of three coupled Gross–Pitaevskii equations with spacetime-dependent external potentials and temporally modulated gain-loss *** different external potentials and gain-loss distributions,various solutions for controlled nonautonomous matterwave breathers and rogue waves are derived by the Darboux transformation method,such as breathers and rogue waves on arched and constant backgrounds which have the periodic and parabolic *** of the gain-loss distribution and linear potential on the breathers and rogue waves are *** two-breathers on the arched and constant backgrounds are also derived.

关键词： Einstein Nonautonomous parabolic

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Transverse Impact Performance and Finite Element Analysis of Three Dimensional Woven Tubular Composite with Different Structures

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SSRN 2024年

作者： Gong, Xiaozhou Song, Yao Chai, Ying Wang, Jiaxuan Liu, Yang Ouyang, Yiwei School of Textile Science and Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

In this study, experiments combined with finite element analysis (FEA) were used to investigate the damage mechanism of transverse low-velocity impacts on three-dimensional woven tubular composites (3DWTC) with different structures. The damage morphology after impact was observed using three-dimensional microscopy and scanning electron microscopy (SEM). Three meso-scale models were constructed based on the authentic structure of the 3DWTC. Additionally, the effects of the structure type on the impact resistance, stress distribution, and damage morphology of 3DWTC were studied. The findings of the study indicate that the shallow cross-linked (SCL) structure exhibits the greatest impact resistance. The through orthogonal (TO) structure exhibits the lowest impact resistance. The greater the straightness of the warp yarns in the structure, the density of the weft, the volume fraction, the greater the cooperative load-bearing capacity of the warp and weft yarns, and the greater the speed of stress propagation. The weft and inner warp yarns are subjected to tensile forces at the point of impact. The outer warp is subjected to compression. The stresses are distributed in a cross-shaped pattern. The straightened warp and weft parts of the TO play an important structural role in load-bearing. The warp yarns of the SCL and the shallow-crossed curved joint (SCCJ) structure play a significant role in the load-bearing capacity of the structure. © 2024, The Authors. All rights reserved.

关键词： Finite element method

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High Transparent and Robust Ionically Conductive Cellulose Hydrogels for Flexible and Antifreezing Strain Sensors

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SSRN 2023年

作者： Li, Xiaoyan Tu, Hu Wang, Peng Liu, Yuncui Shao, Xiaoyu Tan, Sirui Cai, Guangming Zhang, Ruquan State Key Laboratory of New Textile Materials and Advanced Processing Technologies Hubei Key Laboratory of Advanced Textile Materials & Application Key Laboratory of Textile Fiber & Product Ministry of Education Wuhan Textile University Wuhan430200 China

The development of flexible sensors with multifunction such as high transparency, good mechanical properties and durability, biodegradability, excellent antifreezing ability and sensitivity still remains a great challenge. Herein, cellulose hydrogels were constructed from "green" LiOH/urea solvents via chemically–physically double crosslinked strategy. 1,4-butanediol diglycidyl ether as a long-chain chemical crosslinker was used to enlarge the activity domains of cellulose chains of the crosslinked networks in hydrogels, further improving their elasticity, flexibility and durability. During the physically crosslinked process Li ions were retained within the hydrogel and glycerol was introduced, which could effectively improve the hydrogels mechanical properties and significantly enhance its conductivity. At the same time, Li ions and glycerol could form hydrogen bonds with water molecules, greatly enhancing the hydrogel's freeze resistance and water retention. The ionically conductive cellulose hydrogels with high transparence could sensitively monitor the human motions including large motions and subtle actions, as well as the detection of heartbeat rate, pulse beat and body temperature changes and the usage as an electronic skin, which showed great potential for visually monitoring human physiological functions in extreme environments. © 2023, The Authors. All rights reserved.

关键词： Cellulose

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Durable and Wearable Self-powered Temperature Sensor Based on Self-healing Thermoelectric Fiber by Coaxial Wet Spinning Strategy for Fire Safety of Firefighting Clothing

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advanced Fiber materials 2024年第5期6卷 1387-1401页

作者： Qing Jiang Yuhang Wan Yi Qin Xueru Qu Mi Zhou Siqi Huo Xiaochun Wang Zhicai Yu Hualing He State Key Laboratory of New Textile Materials and Advanced Processing Technologies Hubei Key Laboratory of Biomass Fibers and Eco-dyeing&FinishingSchool of Textile Science and EngineeringWuhan Textile UniversityWuhan 430200China Centre for Future Materials University of Southern QueenslandSpringfield Central 4300Australia School of Materials Design and Engineering Beijing Institute of Fashion TechnologyBeijing 100029China

Self-healable electronics with self-recoverable mechanical properties show a lot of potential in improving the reliability and durability of wearable electronic devices,but it is still ***,a self-healing core-sheath thermoelectric(TE)fiber-based temperature sensor was continuously fabricated by coaxial wet-spinning strategy,whose core layer and sheath layer are,respectively,pure Ti_(3)C_(2)T_(x)MXene and self-healing silk sericin(SS)/oxide sodium alginate(OSA)*** prepared SS/OSA@MXene core-sheath TE fiber exhibits accurate temperature-sensing at 200-400℃based on a linear relationship between TE voltage and temperature *** core-sheath TE fiber that can be integrated into firefighting clothing and timely alert firefighters to evacuate from the fire before the protective clothing becomes *** exposed to flames,SS/OSA@MXene can rapidly trigger a high-temperature warning voltage of 3.36 mV within 1.17 s and exhibit reversible high-temperature alarm *** addition,the fractured SS/OSA@MXene can restore up to 89.12%of its original strain limit at room temperature because of the robust yet reversible dynamic covalent bonds between SS and *** this study,an ingenious strategy for developing a durable and wearable TE fiber-based self-powered temperature sensor was *** strategy has promising application prospects in real-time temperature detection of firefighting clothing to ensure the safety of firefighters operating on a fire scene.

关键词： Core-sheath thermoelectric fiber Self-powered sensor High-temperature warning Self-healing Coaxial wet spinning

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Lightweight Network Based on Improved Yolov8n for Clothing Image Detection

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SSRN 2024年

作者： Gong, Haowei Liao, Haibin Ai, Zhe Deng, Yizhou Wei, Zhe School of Electronic and Electrical Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan430200 China

In response to the issues of high computational complexity, large model size, and high computational resource requirements in deep learning-based detection models, an improved lightweight clothing image detection algorithm based on YOLOv8n is proposed. Firstly, some GhostConv are employed to replace ordinary Conv in benchmark model to reduce the number of parameters. Additionally, we design a C2f-GD module to enhanced the bottleneck structure in the C2f architecture by using GhostConv and DCNv2 modules, which can improve compression detection performance while reducing model size and parameter count. Finally, the Inner-EIoU loss function is substituted for the original CIoU loss function to enhance the regression analysis performance of the model's bounding boxes. Experimental results on the open-source fashion dataset Deepfashion2 demonstrate that the lightweight clothing image prediction network demonstrates a significant level of reduced size and parameter count, improved detection accuracy. Compared to the YOLOv8n benchmark model, theproposed model achieves a 1.1% increase in precision and a 2.6% increase in mean average precision (mAP), while reducing model size and parameter count by 0.65MB and 0.315×109, which has good practical value. © 2024, The Authors. All rights reserved.

关键词： Regression analysis

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Inner Co Synergizing Outer Ru Supported on Carbon Nanotubes for Efficient pH-Universal Hydrogen Evolution Catalysis

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Nano-Micro Letters 2022年第11期14卷 275-289页

作者： Jian Chen Yuan Ha Ruirui Wang Yanxia Liu Hongbin Xu Bin Shang Renbing Wu Hongge Pan Institute of Science and Technology for New Energy Xi’an Technological UniversityXi’an 710021People’s Republic of China School of Advanced Materials and Nanotechnology Xidian UniversityXi’an 710126People’s Republic of China Department of Materials Science Fudan UniversityShanghai 200433People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430073People’s Republic of China State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027People’s Republic of China

Exploring highly active but inexpensive electrocatalysts for the hydrogen evolution reaction(HER)is of critical importance for hydrogen production from electrochemical water ***,we report a multicomponent catalyst with exceptional activity and durability for HER,in which cobalt nanoparticles were in-situ confined inside bamboo-like carbon nanotubes(CNTs)while ultralow ruthenium loading(~2.6μg per electrode area~cm^(−2))is uniformly deposited on their exterior walls(Co@CNTsǀRu).The atomic-scale structural investigations and theoretical calculations indicate that the confined inner Co and loaded outer Ru would induce charge redistribution and a synergistic electron coupling,not only optimizing the adsorption energy of H intermediates(ΔGH*)but also facilitating the electron/mass *** as-developed Co@CNTsǀRu composite catalyst requires overpotentials of only 10,32,and 63 mV to afford a current density of 10 mA cm^(−2) in alkaline,acidic and neutral media,respectively,representing top-level catalytic activity among all reported HER *** current work may open a new insight into the rational design of carbon-supported metal catalysts for practical applications.

关键词： Cobalt nanoparticles Carbon nanotubes Ru nanoclusters Hydrogen evolution reaction

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Trend Learning Based Loss Function for Time-Series Forecasting

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SSRN 2024年

作者： Hai-Bin, Liao Yi-Yang, Hu Li, Yuan School of Electronic and Electrical Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan430200 China

The loss function is a vital component of time-series forecasting models based on deep learning. The widely used norm distances-based loss functions, which is vulnerable to not consider dynamic temporal patterns, resulting in its inability to capture the trend or shape of the sequence well. On the other hand, in practice, the sequence data will have various distortions due to the influence of environmental factors, and how to overcome the data distortion variations is an important challenge for loss function design in time series forecasting. Aiming at the above challenges, we design a loss function framework based on time-series trend learning, which consists of trend direction guidance and point-wise representation terms. Based on the loss function framework, we propose a novel loss function, called Tre-Loss (Trend learning based loss function), that not only considers the distortions in all aspects but also allows models to capture the trend or shape of time-series. Tre-Loss is a plug-and-play loss function that can be directly applied to almost arbitrary time series forecasting network, which is Model-Agnostic. We evaluate the effectiveness of Tre-Loss by conducting extensive experiments from naive models to state-of-the-art models. The experiment results indicate that the models trained with Tre-Loss outperforms those trained with other training metrics (e.g., MSE, DILATE and TILDE-Q). Our code and models will be available at GitHub https://***/liaohaibing/Trend-learning-loss-function. © 2024, The Authors. All rights reserved.

关键词： Time series

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