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Organic Tribovoltaic Nanogenerator with Electrically and Mechanically Tuned Flexible Semiconductor Textile

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SSRN 2022年

作者： Liu, Guoxu Luan, Ruifei Qi, Youchao Gong, Likun Cao, Jie Wang, Zhihao Liu, Feng Zeng, Jianhua Huang, Xinlong Qin, Yuhan Dong, Sicheng Feng, Yuan Huang, Longbiao Zhang, Chi Key Laboratory of Optoelectronic Devices and Systems Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing101400 China School of Nanoscience and Technology University of Chinese Academy of Sciences Beijing100049 China Center on Nanoenergy Research School of Physical Science and Technology Guangxi University China Institute of Intelligent Flexible Mechatronics Jiangsu University China

Obtaining a wear-resistant, high-output, flexible direct current (DC) friction energy harvester is quite important for implementing self-powered portable electronic devices and Internet of Things (IoT). In this work, a direct current flexible textile organic tribovoltaic nanogenerator (FT-OTG) is reported, which is consisted of blended film of 11.11% poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT: PSS) and 88.89% polyvinyl alcohol (PVA), a hydrophilic conductive ink, a hydrophobic conductive textile and Al slider. The working mechanism of OTG is that after absorbing friction energy, abound electron-hole pairs are excited at the metal-semiconductor interface. These carriers move directionally under the joint drive of electrostatic field and the built-in electric field to form a current. After PVA doping, the output performance of DC-OTG, including open-circuit voltage and short-circuit current, is improved 5.6 times and 4.2 times, respectively. Furthermore, the mechanical properties of blended film, such as wear resistance, elongation and tensile strength, are improved, among which elongation at break is increased by 8 times and tensile strength increased by 3.2 times. By simplify series connecting, 3 FT-OTGs can constantly power portable electronics, like electronic watch, thermometer and calculator, respectively. This work provides an effective way for simultaneously enhanced output performance and mechanical properties of FT-OTG, which is expected to be a robust way for harvesting friction energy for self-powered electronics device and IoT sensors. © 2022, The Authors. All rights reserved.

关键词： Nanogenerators

Performance Enhancement of Transparent and Flexible Triboelectric Nanogenerator Based on One-Dimensionally Hybridized Copper/Polydimethylsiloxane Film

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SSRN 2022年

作者： Li, Gui-Zhong Cai, Ya-Wei Wang, Gui-Gen Sun, Na Li, Fei Zhou, Hai-Ling Zhang, Xiao-Nan Zhao, Hai-Xu Wang, Yuanhao Han, Jie-Cai Yang, Ya Shenzhen518055 China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing101400 China SUSTech Engineering Innovation Center School of Environmental Science and Engineering Southern University of Science and Technology Guangdong Shenzhen518055 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China School of Nanoscience and Technology University of Chinese Academy of Sciences Beijing100049 China College of Mechanical and Electrical Engineering Wenzhou University Wenzhou325035 China

Wearable/portable devices are essential for the automation, intelligence and digitization of next-generation electronic products. However, it is still challenging to obtain a kind of flexible, transparent and lightweight power source for these. Here, these were fabricated by cost-effective and feasible methods for both TENG with dual-electrode mode (tribo-negative layer: poly-(dimethylsiloxane)/copper nanowires (PDMS/Cu NWs), trio-positive layer: PET), and TENG with single-electrode mode based on half-embedded Cu NWs electrode and PDMS/Cu NWs negative friction layer s. Respectively, these as-obtained TENGs show good flexibilities and transparency. Meanwhile, the two kinds of TENG exhibit high output voltages and power densities of 120 V and 2.0 W/m2, 45 V and 0.135 W/m2, respectively. The enhancements are ascribed to the increase of capacitance and electron flow in the tribo-electric layers caused by doping Cu NWs. The advantages of the PDMS/Cu NWs based TENG include the ease of fabrication, good biocompatibility, flexibility and transparency, empowering it as a promising sustainable method for obtaining daily environmental energy as a self-powered source to drive wearable/portable electronic devices. © 2022, The Authors. All rights reserved.

关键词： Nanogenerators

Performance Enhancement of Transparent and Flexible Triboelectric Nanogenerator Based on One-Dimensionally Hybridized Copper/Polydimethylsiloxane Film

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SSRN 2022年

作者： Li, Gui-Zhong Cai, Ya-Wei Wang, Gui-Gen Sun, Na Li, Fei Zhou, Hai-Ling Zhang, Xiao-Nan Zhao, Hai-Xu Wang, Yuanhao Han, Jie-Cai Yang, Ya Shenzhen518055 China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing101400 China SUSTech Engineering Innovation Center School of Environmental Science and Engineering Southern University of Science and Technology Guangdong Shenzhen518055 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China School of Nanoscience and Technology University of Chinese Academy of Sciences Beijing100049 China College of Mechanical and Electrical Engineering Wenzhou University Wenzhou325035 China

Wearable/portable devices are essential for the automation, intelligence and digitization of next-generation electronic products. However, it is still challenging to obtain a kind of flexible, transparent and lightweight power source for these. Here, both a dual-electrode poly-(dimethylsiloxane)/copper nanowires (PDMS/Cu NWs) based TENG and a single-electrode mode TENG based on half-embedded Cu NWs electrode and PDMS/Cu NWs negative friction layer was fabricated by cost-effective and feasible methods. Respectively, these as-obtained TENGs show good flexibilities and transparency. Meanwhile, the two kinds of TENG exhibit high output voltages and power densities of 120 V and 2.0 W/m 2 , 45 V and 0.135 W/m 2 , respectively. The enhancements are ascribed to the increase of capacitance and electron flow in the friction layers caused by doping Cu NWs. The advantages of the PDMS/Cu NWs based TENG include the ease of fabrication, good biocompatibility, flexibility and transparency, empowering it as a promising sustainable method for obtaining daily environmental energy as a self-powered source to drive wearable/portable electronic devices. © 2022, The Authors. All rights reserved.

关键词： Nanogenerators

Hierarchical Deep Reinforcement Learning for Age-of-Information Minimization in IRS-aided and Wireless-powered Wireless Networks

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arXiv

arXiv 2022年

作者： Gong, Shimin Cui, Leiyang Gu, Bo Lyu, Bin Hoang, Dinh Thai Niyato, Dusit The School of Intelligent Systems Engineering Sun Yat-sen University Shenzhen518055 China Key Laboratory of Ministry of Education in Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications China The School of Electrical and Data Engineering University of Technology Sydney Australia School of Computer Science and Engineering Nanyang Technological University Singapore

In this paper, we focus on a wireless-powered sensor network coordinated by a multi-antenna access point (AP). Each node can generate sensing information and report the latest information to the AP using the energy harvested from the AP’s signal beamforming. blueWe aim to minimize the average age-of-information (AoI) by adapting the nodes’ transmission scheduling and the transmission control strategies jointly. To reduce the transmission delay, an intelligent reflecting surface (IRS) is used to enhance the channel conditions by controlling the AP’s beamforming bluevector and the IRS’s phase shifting bluematrix. blueConsidering dynamic data arrivals at different sensing nodes, we propose a hierarchical deep reinforcement learning (DRL) framework to bluefor AoI minimization in two steps. The users’ transmission scheduling is firstly determined by the outer-loop DRL approach, e.g. the DQN or PPO algorithm, and then the inner-loop optimization is used to adapt either the uplink information transmission or downlink energy transfer to all nodes. A simple and efficient approximation is also proposed to reduce the blueinner-loop rum time overhead. Numerical results verify that the hierarchical learning framework outperforms typical baselines in terms of the average AoI and proportional fairness among different nodes. © 2022, CC BY.

关键词： Reinforcement learning

Atomic-Scale Tracking Phase Transition Dynamics of Berezinskii-Kosterlitz-Thouless Polar Vortex-Antivortex

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arXiv

arXiv 2023年

作者： Zhu, Ruixue Zheng, Sizheng Li, Xiaomei Wang, Tao Tan, Congbing Yu, Tiancheng Liu, Zhetong Wang, Xinqiang Li, Jiangyu Wang, Jie Gao, Peng Electron Microscopy Laboratory School of Physics Peking University Beijing100871 China International Center for Quantum Materials School of Physics Peking University Beijing100871 China Department of Engineering Mechanics Zhejiang University Zhejiang Hangzhou310027 China Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials School of Physics and Electronics Hunan University of Science and Technology Hunan Xiangtan411201 China State Key Laboratory of Artificial Microstructure and Mesoscopic Physics School of Physics Peking University Beijing100871 China Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices Southern University of Science and Technology Guangdong Shenzhen518055 China School of Integrated Circuits East China Normal University Shanghai200241 China Zhejiang Laboratory Hangzhou311100 China Collaborative Innovation Centre of Quantum Matter Beijing100871 China

Particle-like topologies, such as vortex-antivortex (V-AV) pairs, have garnered significant attention in the field of condensed matter. However, the detailed phase transition dynamics of V-AV pairs, as exemplified by self-annihilation, motion, and dissociation, have yet to be verified in real space due to the lack of suitable experimental techniques. Here, we employ polar V-AV pairs as a model system and track their transition pathways at atomic resolution with the aid of in situ (scanning) transmission electron microscopy and phase field simulations. We demonstrate the absence of a Berezinskii-Kosterlitz-Thouless phase transition between the room-temperature quasi-long-range ordered ground phase and the high-temperature disordered phase. Instead, we observe polarization suppression in bound V-AV pairs as the temperature increases. Furthermore, electric fields can promote the vortex and antivortex to approach each other and annihilate near the interface. The elucidated intermediate dynamic behaviors of polar V-AV pairs under thermal- and electrical-fields lay the foundation for their potential applications in electronic devices. Moreover, the dynamic behaviors revealed at atomic scale provide us new insights into understanding topological phase of matter and their topological phase transitions. © 2023, CC BY.

关键词： Scanning electron microscopy

Ultrathin Breathable and Stretchable Electronics Based on Patterned Nanofiber Composite Network

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SSRN 2022年

作者： Li, Jing Pan, Xiaojun Zhang, Yufei Liu, Yue Wang, Chunfeng Wan, Yixin Tao, Juan Bao, Rongrong Pan, Caofeng CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing101400 China School of Nanoscience and Technology University of Chinese Academy of Sciences Beijing100049 China College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China Center on Nanoenergy Research School of Physical Science and Technology Guangxi University Guangxi Nanning530004 China

Wearable comfort and performance modulation of stretchable electronics are the focus of next-generation electronic skin. Herein, we developed ultrathin breathable and stretchable electronics by introducing elaborate patterned electrospinning technology. The principle of patterned electrospinning technology is studied and this technology is proved to be universal for variety of polymers experimentally. The effect of electrospinning time and patterned pore size on the performance of patterned electrospinning film is studied. Utilizing ultrathin patterned stretchable thermoplastic polyurethane electrospinning film (10 μm) as supportive layer, a patterned nanofiber composite network is constructed combined with Ag nanowires and TPU/Ag nanofibers . The patterned nanofiber composite network is achieved with outstanding stretchability and conductivity, while the mean sheet resistance is as low as 1.59 Ω/sq and can be stretched to 110% strain. The electromechanical performance of nanofiber composite network is controlled by the pore size of patterned electrospinning film, which can be applied for stable, breathable and stretchable electrode and strain sensor. Hence, the elaborate patterned electrospinning technology and the fabrication and modulation of patterned nanofiber composite network offer a method for stretchable electronics. © 2022, The Authors. All rights reserved.

关键词： Electrospinning

Lateral bipolar photoresistance effect in the CIGS heterojunction and its application in position sensitive detector and memory device

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Science Bulletin 2020年第6期65卷 477-485,M0004页

作者： Jihong Liu Zicai Zhang Shuang Qiao Guangsheng Fu Shufang Wang Caofeng Pan Hebei Key Laboratory of Optic-Electronic Information and Materials College of Physics Science and TechnologyHebei UniversityBaoding 071002China Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China

Cu(In,Ga)Se2(CIGS) based multilayer heterojunction, as one of the best high efficiency thin film solar cells, has attracted great interest due to its outstanding features. However, the present studies are primarily focused on the structure optimization and modulation in order to enhance the photoelectric conversion efficiency. Here, we exploit another application of this multilayer heterostructure in photoresistance-modulated position sensitive detector by introducing lateral photoresistance *** lateral photoresistance measurements show that this multilayer heterojunction exhibits a wide spectral response(~330 to ~1150 nm) and excellent bipolar photoresistance performances(position sensitivity of ~63.26 X/mm and nonlinearity <4.5%), and a fast response speed(rise and fall time of ~14.46 and^14.42 ms, respectively). More importantly, based on the lateral photoresistance effect, the CIGS heterostructure may also be developed as a position-dependent resistance memory device, which can be modulated by changing laser intensity, wavelength, and bias voltage with excellent stability and repeatability, and the position resolution reaches up to 1 lm. These results can be well explained by considering the diffusion and the drift model of carriers in the CIGS multilayer heterojunction. This work provides a new approach of achieving novel photoelectric sensors and memory devices based on the traditional photovoltaic heterostructures.

关键词： CIGS heterostructure Lateral photoresistance Photoresponse Position sensitive detector

Ultrafast polarization modulation with high-purity chiral quasi-BIC metasurfaces

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Chinese Optics Letters 2025年第5期23卷 053605-053605页

作者： Fangxing Lai Yubin Fan Xinbo Sha Huachun Deng Xiong Jiang Shumin Xiao Can Huang Qinghai Song Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China Department of Electrical Engineering City University of Hong Kong Hong Kong 999077 China Heilongjiang Provincial Key Laboratory of Advanced Quantum Functional Materials and Sensor Devices Harbin 150001 China

Precise control of the polarization state of light on ultrafast time scales plays a key role in revealing the inherent chiral or anisotropic optical responses in various material systems, and it is crucial for applications that require complex polarization encoding. Here, we explore ultrafast polarization control enabled by silicon-based chiral bound state in the continuum (BIC) metasurfaces. By utilizing the intrinsic chiral mode, we achieve high-purity chiral reflection light (S 3 ∼ −0.92) and rapid modulation (∼0.4 ps) of polarization states through all-optical methods. Unlike traditional polarization modulation techniques, our approach leverages the unique advantages of slanted etching dielectric chiral BIC metasurfaces, which facilitate high- Q resonance and exhibit narrow linewidths. These advantages allow swift alterations in polarization states with minimal modulation energy consumption, which should help for greater control of light in integrated photonic applications.

关键词： Light matter interactions Modulation techniques Polarization control Q factor Refractive index Scanning electron microscopy

Dynamics of Polar Skyrmion Bubbles under Electric Fields

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Physical Review Letters 2022年第10期129卷 107601-107601页

作者： Ruixue Zhu Zhexin Jiang Xinxin Zhang Xiangli Zhong Congbing Tan Mingwei Liu Yuanwei Sun Xiaomei Li Ruishi Qi Ke Qu Zhetong Liu Mei Wu Mingqiang Li Boyuan Huang Zhi Xu Jinbin Wang Kaihui Liu Peng Gao Jie Wang Jiangyu Li Xuedong Bai Electron Microscopy Laboratory and International Center for Quantum Materials School of Physics Peking University Beijing 100871 China Department of Engineering Mechanics Zhejiang University Hangzhou 310027 Zhejiang China School of Materials Science and Engineering Xiangtan University Xiangtan 411105 Hunan China Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials School of Physics and Electronics Hunan University of Science and Technology Xiangtan 411201 Hunan China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 Guangdong China State Key Laboratory for Artificial Microstructure & Mesoscopic Physics School of Physics Peking University Beijing 100871 China Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials Peking University Beijing 100871 China Zhejiang Laboratory Hangzhou 311100 Zhejiang China Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices Southern University of Science and Technology Shenzhen 518055 Guangdong China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China

Room-temperature polar skyrmions, which have been recently discovered in oxide superlattice, have received considerable attention for their potential applications in nanoelectronics owing to their nanometer size, emergent chirality, and negative capacitance. For practical applications, their manipulation using external stimuli is a prerequisite. Herein, we study the dynamics of individual polar skyrmions at the nanoscale via in situ scanning transmission electron microscopy. By monitoring the electric-field-driven creation, annihilation, shrinkage, and expansion of topological structures in real space, we demonstrate the reversible transformation among skyrmion bubbles, elongated skyrmions, and monodomains. The underlying mechanism and interactions are discussed in conjunction with phase-field simulations. The electrical manipulation of nanoscale polar skyrmions allows the tuning of their dielectric permittivity at the atomic scale, and the detailed knowledge of their phase transition behaviors provides fundamentals for their applications in nanoelectronics.

关键词： Domains Dynamical phase transitions Electric polarization Ferroelectricity Ferroelectrics Topological phase transition