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4th International Conference on Advanced Manufacturing technology and Electronic Information, AMTEI 2024

作者： Tian, Ye Jing, Lei Tong, Zhengrong Li, Peng Wang, Xue Wang, Hao Wang, Zhonghan Jiang, Yongsheng Tianjin Key Laboratory of Thin Film Electronics and Communication Devices Engineering Research Center for Optoelectronic Devices and Communication Technology the Ministry of Education Department of Integrated Circuit Engineering Tianjin University of Technology Tianjin300384 China

ISBN: (数字)9781510688247

ISBN: (纸本)9781510688230

Traditional K-Nearest Neighbors (KNN) and Weighted K-Nearest Neighbors (WKNN) algorithms face challenges due to the fixed selection of the K value. To address this issue, we propose a new algorithm that combines Genetic Algorithm (GA) with WKNN, referred to as GA-WKNN. The GA algorithm optimizes and adjusts the K value, thereby reducing errors in the visible light positioning system. Experimental results show that the GA-optimized WKNN significantly improves localization accuracy compared to traditional methods with a fixed K value. This optimization strategy allows the positioning system to more accurately determine the actual position. © 2025 SPIE.

关键词： Genetic algorithms

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Polythiophene solar cells processed from non-halogenated solvent with 15.68%efficiency

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Science China Chemistry 2023年第8期66卷 2347-2353页

作者： Xiaoxin Tan Youle Li Xiyue Yuan Seoyoung Kim Yue Zhang Changduk Yang Fei Huang Yong Cao Chunhui Duan Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou510640China School of Energy and Chemical Engineering Perovtronics Research CenterLow Dimensional Carbon Materials CenterUlsan National Institute of Science and Technology(UNIST)Ulsan44919Republic of Korea

Polythiophenes(PTs)are prospective polymer donors for large-scale manufacturing and industrialization owing to their simple structures and low synthetic ***,the fabrication of PT solar cells depends on highly toxic chlorinated solvents,and less research has been done on the use of more environmentally friendly non-halogenated ***,highly efficient PT solar cells based on top-performance polythiophene,P5TCN-F25,processed from a non-halogenated solvent are reported by delicate aggregation control.A power conversion efficiency of up to 15.68%was achieved by depositing the active layer from a hot o-xylene solution,which is the record efficiency of non-halogenated processed PT solar cells up to *** appropriate solution temperature is beneficial to the formation of ordered polymer stacking and desirable phase separation size,which thereby contributes to enhanced charge transfer efficiency,more balanced hole/electron mobility,and reduced trap-assisted *** results provide valuable implications for improving the efficiency of PT solar cells via environmentallyfriendly processing.

关键词： polythiophenes organic solar cells high-efficiency non-halogenated solvent aggregation control

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Evolution of polarization singularities accompanied by avoided crossing in plasmonic system

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Chinese Physics B 2023年第1期32卷 305-310页

作者：彭一啸宋前举胡鹏崔大健向红韩德专 Chongqing University Chongqing 400044China School of Science Southwest University of Science and TechnologyMianyang 621010China Chongqing Key Laboratory of Core Optoelectronic Devices for Quantum Communication Chongqing Optoelectronics Research InstituteChongqing 400060China

The evolution of polarization singularities supported in a one-dimensional periodic plasmonic system is *** lateral inversion symmetry of the system,which breaks the in-plane inversion symmetry and up-down mirror symmetry simultaneously,yields abundant polarization states.A complete evolution process with geometry for the polarization states is *** the evolution,circularly polarized points(C points)can stem from 3 different *** addition to the previously reported processes occurring in an isolated band,a new type of C point appearing in two bands simultaneously due to the avoided band crossing,is *** the dielectric system with a similar structure which only supports at-Γbound states in the continuum(BICs),accidental BICs off theΓpoint are realized in this plasmonic *** work provides a new scheme of polarization manipulation for the plasmonic systems.

关键词： polarization singularities topological charge avoided crossing inversion symmetry

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Broadband THz Edge-Enhanced Imaging technology Based on Electro-Optic Sampling 2

Broadband THz Edge-Enhanced Imaging Technology Based on Elec...

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2nd International Conference on Electronic Information and Communication Engineering, EICE 2023

作者： Yuan, Xingming Li, Ying Lin, Qinggang Chen, Jiapin Cai, Yi Xu, Shixiang Li, Jingzhen Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology Key Laboratory of Optoelectronic Devices and Systems Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Guangdong518060 China SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology Key Laboratory of Optoelectronic Devices and Systems Ministry of Education and Guangdong Province Shenzhen University Guangdong518060 China

Based on the radial Hilbert transform of spatial filtering and electro-optical sampling, we propose a broadband terahertz edge-enhanced imaging method in this work. Instead of using a narrow-band THz vortex phase plate, here we use vortex ultrashort laser pulse to realize the THz enhancement imaging which can be applied for few-cycle THz imaging. The principle of edge enhancement is analyzed theoretically, and the analytical expression of the final terahertz imaging is derived. We found that edge-enhancement imaging corresponds to the nonlinear term of the THz field, and the background and linear terms can be suppressed when the static birefringent phase is set to zero. The simulations show that our method can effectively improve the contrast and signal-to-noise ratio of terahertz imaging. © Published under licence by IOP Publishing Ltd.

关键词： Signal to noise ratio

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Improving efficiency of inverted perovskite solar cells via ethanolamine-doped PEDOT:PSS as hole transport layer

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Chinese Physics B 2022年第8期31卷 631-638页

作者： Zi-Jun Wang Jia-Wen Li Da-Yong Zhang Gen-Jie Yang Jun-Sheng Yu State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China(UESTC)Chengdu 610054China

In order to fabricate high-performance inverted perovskite solar cells(Pe SCs), an appropriate hole transport layer(HTL) is essential since it will affect the hole extraction at perovskite/HTL interface and determine the crystallization quality of the subsequent perovskite films. Herein, a facile and simple method is developed by adding ethanolamine(ETA)into poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS) as HTL. The doping of a low-concentration ETA can efficiently modify the electrical properties of the PEDOT:PSS film and lower the highest occupied molecular orbital(HOMO) level, which is more suitable for the hole extraction from the perovskite to HTL. Besides, ETA-doped PEDOT:PSS will create a perovskite film with larger grain size and higher crystallinity. Hence, the results show that the open-circuit voltage of the device increases from 0.99 V to 1.06 V, and the corresponding power conversion efficiency(PCE)increases from 14.68% to 19.16%. The alkaline nature of ethanolamine greatly neutralizes the acidity of PEDOT:PSS, and plays a role in protecting the anode, leading the stability of the devices to be improved significantly. After being stored for2000 h, the PCE of ETA-doped PEDOT:PSS devices can maintain 84.2% of the initial value, which is much higher than67.1% of undoped devices.

关键词： perovskite solar cells PEDOT:PSS ethanolamine doping

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Measurement of white light semiconductor laser junction temperature based on center-of-mass wavelength and integration width 4

Measurement of white light semiconductor laser junction temp...

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4th International Conference on Advanced Manufacturing technology and Electronic Information, AMTEI 2024

作者： Jiang, Yongsheng Jing, Lei Tong, Zhengrong Li, Peng Wang, Xue Wang, Hao Tian, Ye Wang, Zhonghan Tianjin Key Laboratory of Thin Film Electronics and Communication Devices Engineering Research Center for Optoelectronic Devices and Communication Technology the Ministry of Education Department of Integrated Circuit Engineering Tianjin University of Technology Tianjin300384 China

ISBN: (数字)9781510688247

ISBN: (纸本)9781510688230

Junction temperature is an important parameter affecting semiconductor lasers, and accurate and fast measurement of junction temperature is crucial for thermal design and performance inspection of semiconductor laser products. The spectra of white light semiconductor laser were measured under different driving currents and different ambient temperatures, and the effects of current and temperature on white light laser spectra were analyzed. Through the connection between junction temperature, driving current, center-of-mass wavelength, and integration width, the relationship graph of the four is constructed. The corresponding junction temperature can be obtained by combining the relationship graph with the characteristic parameters of the spectral distribution of the white light laser in the actual working state. The experimental results show that, compared with the peak wavelength method, the average error of the measurement of this method is 1.82 ℃, which is a fast, accurate, low-cost and contact-free method for the measurement of the junction temperature of white light semiconductor laser. © 2025 SPIE.

关键词： Photonics

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Layer-by-Layer Flexible Organic Thermoelectric devices based on PEDOT:PSS and PBFDO

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Energy Material Advances 2024年第1期5卷 384-394页

作者： Chan Zhang Haiming Huang Shaobo Han Xi Liu Lixin Mo Jing Zhao Jinpeng Mo Canyan Che College of Textile Science and Engineering Wuyi UniversityJiangmen 529020China Beijing Engineering Research Center of Printed Electronics Beijing Institute of Graphic CommunicationBeijing 102600China State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSouth China University of TechnologyGuangzhouChina

Recent advances in n-type conducting polymers are beginning to rival those of p-type ***,the n-type conducting polymer poly(benzodifurandione)(PBFDO)demonstrates a notable Seebeck coefficient along with exceptionally high electrical conductivity,positioning it as a promising n-type thermoelectric material with substantial research *** its promise,the exploration of PBFDO’s thermoelectric properties and the development of related thermoelectric devices have been *** this study,we introduce a flexible thermoelectric device that utilizes a combination of the p-type polymer poly(3,4ethylenedioxythiophene):polystyrene sulfonate and the n-type polymer PBFDO,using a straightforward print-and-fold *** approach enabled the production of flexible devices with thermoelectric generators whose properties were *** polymer films and the resultant devices demonstrated commendable performance stability even after being subjected to 1,000 bending cycles at a 90°*** findings corroborate the potential of PBFDO as a viable material for flexible thermoelectric applications,a development that is eagerly anticipated in the field.

关键词： n type conducting polymers thermoelectric devices thermoelectric properties flexible thermoelectric devices PEDOT PSS seebeck coefficient PBFDO thermoelectric material

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Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting

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Frontiers in Energy 2024年第3期18卷 378-389页

作者： Zhao-ting SHANG Tang-ming LI Bing-qian HU Min LIU Wang-ting LU Fan YU Yun ZHENG Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education College of Optoelectronic Materials and TechnologyJianghan UniversityWuhan 430056China Institute of New Energy Materials and Engineering School of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China Department of Chemical Engineering University of WaterlooWaterlooOntario N2L 3G1Canada

The use of two-dimensional(2D)layered metal-organic frameworks(MOFs)as self-sacrificial templates has been proven to be a successful method to create high-efficiency Selenium(Se)-containing electrocatalysts for overall water ***,two strategies are then utilized to introduce Se element into the Co–Fe MOF,one being the etching of as-prepared MOF by SeO_(2) solution,and the other,the replacing of SCN−with SeCN−as the construction *** electrochemical activity of the pristine 2D MOF and their calcinated derivatives for catalyzing the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)is evaluated and further *** is found that the effect of introducing Se on improving electrochemical catalytic activity is significant for the HER ***,the calcinated derivative in the replacing method exhibits an overpotential of 235 mV for HER and 270 mV for OER at a current density of 10 mA/*** comparing the two methods of introducing Se element into MOF,similar electrocatalytic activity can be achieved on the their calcinated *** high electrochemical performance of 2D CoFe-MOF derivatives may be resulted from the unique 2D hierarchical porous structure and strong synergistic effect between different components in the material.

关键词： 2D MOF selenium(Se)-containing materials hydrogen evolution reaction(HER) oxygen evolution reaction(OER)

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MZI/FPI Fiber Optic Dual-parameter Sensor Based on a Double Cone and Air Cavity Structure(Invited)

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光子学报 2024年第10期53卷 64-72页

作者： YUAN Tingxuan ZHAO Lilong REN Jianxin MAO Yaya ULLAH Rahat WU Xiangyu MAO Beibei XIA Wenchao Institute of Optics and Electronics Nanjing University of Information Science&TechnologyNanjing 210044China Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean Nanjing University of Information Science&TechnologyNanjing 210044China Jiangsu International Joint Laboratory on Meteorological Photonics and Optoelectronic Detection Nanjing University of Information Science&TechnologyNanjing 210044China

This paper proposes a Mach Zehnder/Fabry Perot Interferometer(MZI/FPI)fiber sensor based on Single-mode Fiber(SMF)and Hollow-core Fiber(HCF),which has high sensitivity to temperature and lateral *** proposed device consists of two single-mode fiber cones formed by manually controlling the fusion splicer and an air cavity formed by fusing a section of hollow-core *** structure of the sensor is a double cone cascaded air *** the beginning of the design,we compared the basic transmission spectra of single cone structure and double cone structure experimentally,and therefore chose to use double cone structure and air cavity *** undergoes its first reflection at the first interface between the single-mode fiber and the air cavity structure,and its second reflection at the second interface between the air cavity structure and the single-mode *** two reflected light waves produced by the two reflections form FP interference,which can be used to measure lateral *** transmitted light is excited through the first cone,and a portion of the core mode light is excited to the cladding,while another portion of the core mode light continues to propagate in the *** light couples at the second cone,and the cladding mode light couples back into the core,forming MZ interference with the core mode light,which can be used to measure *** use of hollow-core fiber to form an air cavity has little effect on transmitted light,while avoiding the problem of crosstalk in dual parameter *** designing temperature and lateral load experiments,this article verifies the sensitivity characteristics of this sensor to temperature and lateral loads.A significant redshift phenomenon was observed in the temperature experiment.A significant redshift phenomenon also occurred in the lateral load *** wavelength demodulation,the experimental results show that the wavelength sensitivity of the sensor to temperature is 56.29 pm/℃i

关键词： Temperature Lateral load Fiber sensor Mach-Zehnder interferometer Fabry-Pérot interferometer

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Observation of Giant Topological Hall Effect in Room-Temperature Ferromagnet Cr_(0.82)Te

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Chinese Physics Letters 2024年第6期41卷 128-140页

作者：苗伟婷甄伟立陆振王恒宁王杰牛群田明亮 Anhui Key Laboratory of Low-energy Quantum Materials and Devices High Magnetic Field LaboratoryHFIPSChinese Academy of SciencesHefei 230031China Science Island Branch Graduate School of University of Science and Technology of ChinaHefei 230026China School of Physics and Optoelectronic Engineering Anhui UniversityHefei 230601China

Novel magnetic materials with non-trivial magnetic structures have led to exotic magnetic transport properties and significantly promoted the development of spintronics in recent *** them is the Crx Tey family,the magnetism of which can persist above room temperature,thus providing an ideal system for potential spintronic *** we report the synthesis of a new compound,Cr_(0.82)Te,which demonstrates a record-high topological Hall effect at room temperature in this ***_(0.82)Te displays soft ferromagnetism below the Curie temperature of 340 *** magnetic measurement shows an obvious magneto-crystalline anisotropy with the easy axis located in the ab *** anomalous Hall effect can be well explained by a dominating skew scattering ***,after removing the normal Hall effect and anomalous Hall effect,a topological Hall effect can be observed up to 300 K and reaches up to 1.14μΩ·cm at 10 K,which is superior to most topological magnetic structural *** giant topological Hall effect possibly originates from the noncoplanar spin configuration during the spin flop *** work extends a new Cr_(x)Te_(y) system with topological non-trivial magnetic structure and broad prospects for spintronics applications in the future.

关键词： mechanism process topological

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