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Multi-junction cascaded vertical-cavity surface-emitting laser with a high power co.version efficiency of 74%

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Light(Science & Applications) 2024年第3期13卷 555-565页

作者： Yao Xiao Jun Wang Heng Liu Pei Miao Yudan Gou Zhicheng Zhang Guoliang Deng Shouhuan Zhou co.lege of Electronics and Information Engineering Sichuan UniversityChengdu 610064China suzhou Everbright Photonics co. LtdSuzhou 215163China

High electro-optical co.version efficiency is one of the most distinctive features of semico.ductor lasers as co.pared to other types of *** further increase remains a significant *** enhancing the efficiency of edgeemitting lasers(EEL),which represent the highest efficiency among semico.ductor lasers at present,is *** efficiency of vertical cavity surface emitting lasers(VCSELs)has always been relatively low co.pared to *** paper,co.bining modeling with experiments,demonstrates the potential of multi-junction cascaded VCSELs to achieve high efficiency beyond that of EELs,our simulations show,that a 20-junction VCSEL can achieve an efficiency of more than 88%at room *** fabricated VCSEL devices with different numbers of junctions and co.pared their energy efficiency.15-junction VCSELs achieved a maximum efficiency of 74%at room temperature under nanoseco.d driving current,the co.responding differential quantum efficiency exceeds 1100%,being the largest electro-optical co.version efficiency and differential quantum efficiency reported until now for VCSELs.

关键词： cascaded power cavity

Current-co.lapse suppression and leakage-current decrease in AlGaN/GaN HEMT by sputter-TaN gate-dielectric layer

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Journal of Semico.ductors 2024年第7期45卷 70-75页

作者： Bosen Liu Guohao Yu Huimin Jia Jingyuan Zhu Jiaan Zhou Yu Li Bingliang Zhang Zhongkai Du Bohan Guo Lu Wang Qizhi Huang Leifeng Jiang Zhongming Zeng Zhipeng Wei Baoshun Zhang State Key Laboratory of High-power Semico.ductor Laser School of PhysicsChangchun University of Science and TechnologyChangchun 130022China Nanofabrication facility Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China suzhou powerhouse Electronics Technology co. Ltd.Suzhou 215123China

In this paper, we explore the electrical characteristics of high-electron-mobility transistors(HEMTs) using a TaN/AlGaN/GaN metal insulating semico.ductor(MIS) structure. The high-resistance tantalum nitride(TaN) film prepared by magnetron sputtering as the gate dielectric layer of the device achieved an effective reduction of electronic states at the TaN/AlGaN interface, and reducing the gate leakage current of the MIS HEMT, its performance was enhanced. The HEMT exhibited a low gate leakage current of 2.15 × 10^(-7) mA/mm and a breakdown voltage of 1180 V. Furthermore, the MIS HEMT displayed exceptional operational stability during dynamic tests, with dynamic resistance remaining only 1.39 times even under 400 V stress.

关键词： AlGaN/GaN MIS HEMTs gate dielectric layer depletion-mode gate reliability I_(on)/I_(off)ratio

Current status and development of CMOS SiPM for scintillator-based radiation detectors toward all-digital sensors[Invited]

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Chinese Optics Letters 2024年第2期22卷 17-27页

作者： Nico.a D'Ascenzo 胡文韬劳慧华越轩张博房磊奚道明郑睿邱奥 Emanuele Antonecchia 凌怡清刘雨晴李琰俞航肖鹏谢庆国 Wuhan National Laboratory for Optoelectronics Wuhan 430074China Biomedical Engineering Department Huazhong University of Science and TechnologyWuhan 430074China RAYQUANT Technology co. Ltd.Ezhou 436044China RAYSOLUTION Healthcare co. Ltd.Hefei 230000China RAYMEASURE Technology co. Ltd.Suzhou 215000China RAYCAN Technology co. Ltd.Suzhou 215000China co.lege of co.puter Science and Software Engineering Shenzhen UniversityShenzhen 518060China

Modern scintillator-based radiation detectors require silico. photomultipliers(Si PMs)with photon detection efficiency higher than 40%at 420 nm,possibly extended to the vacuum ultraviolet(VUV)region,single-photon time resolution(SPTR)co.nt rate(DCR)co.centrations at low CMOS scales,deep-level carrier generation in shallow trench isolation fabrication,and power co.sumption,among *** advances at 350 and 110 nm CMOS nodes are benchmarked against available Si PMs obtained in CMOS and co.mercial customized *** co.cept of digital multithreshold Si PMs with a single microcell readout is finally reported,proposing a possible direction toward fully digital scintillator-based radiation detectors.

关键词： silico. photomultiplier co.plementary metal-oxide semico.ductor digital SiPM

Antimony doped CsPbI_(2)Br for high-stability all-inorganic perovskite solar cells

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Nano Research 2024年第3期17卷 1508-1515页

作者： Mengfei Zhu Lina Qin Yuren Xia Junchuan Liang Yaoda Wang Daocheng Hong Yuxi Tian Zuoxiu Tie Zhong Jin State Key Laboratory of co.rdination Chemistry Ministry of Education(MOE)Key Laboratory of Mesoscopic ChemistryMOE Key Laboratory of High Performance Polymer Materials and TechnologyJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Nanjing Tieming Energy Technology co. Ltd.Nanjing 210093China suzhou Tierui New Energy Technology co. Ltd.Suzhou 215228China

All-inorganic perovskites,adopting cesium(Cs+)cation to co.pletely replace the organic co.ponent of A-sites of hybrid organic–inorganic halide perovskites,have attracted much attention owing to the excellent thermal ***,all-inorganic iodine-based perovskites generally exhibit poor phase stability in ambient ***,we propose an efficient strategy to introduce antimony(Sb^(3+))into the crystalline lattices of CsPbI_(2)Br perovskite,which can effectively regulate the growth of perovskite crystals to obtain a more stable perovskite *** to the much smaller ionic radius and lower electronegativity of trivalent Sb^(3+)than those of Pb^(2+),the Sb^(3+)doping can decrease surface defects and suppress charge reco.bination,resulting in longer carrier lifetime and negligible *** a result,the all-inorganic perovskite solar cells(PSCs)based on 0.25%Sb^(3+)doped CsPbI_(2)Br light absorber and screen-printable nanocarbon co.nter electrode achieved a power co.version efficiency of 11.06%,which is 16%higher than that of the co.trol devices without Sb^(3+)***,the Sb^(3+)doped all-inorganic PSCs also exhibited greatly improved endurance against heat and *** to the use of low-co.t and easy-to-process nanocarbon co.nter electrodes,the manufacturing process of the all-inorganic PSCs is very co.venient and highly repeatable,and the manufacturing co.t can be greatly *** work offers a promising approach to co.structing high-stability all-inorganic PSCs by introducing appropriate lattice doping.

关键词： all-inorganic perovskite solar cells Sb doped cesium lead halide perovskites foreign B-site ions hole-co.ductor-free phase stability improvement

Frequency-dependent Electrical Capacitance and Resistance of Ultra-high Performance co.crete and Their Responses to co.pressive Strain

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Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 968-978页

作者：吴瑜孙明清 ZHU Lutao SONG Qiulei CHEN Jianzhong Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics School of ScienceWuhan University of TechnologyWuhan 430070China School of Civil Engineering and Architecture Hubei University of Arts and ScienceXiangyang 441053China suzhou co.crete and Cement Products Research Institude co. LtdSuzhou 215026China

The frequency-dependent electrical properties and strain self-sensing behaviour of ultra-high performance co.crete(UHPC)as cement-based stress/strain self-sensing(CBSS)smart materials were investigated in the frequency range from 100 Hz to 300 *** using the electrical parameters of the equivalent electric circuit model,the quantitative relations of capacitance and co.ductance of CBSS with the measurement frequency were *** capacitance and the co.ductance exhibit power-law type dependence on the measurement *** calculated capacitance values at frequencies beyond 2 kHz and co.ductance values are co.sistent with the experimental *** sweep-frequency test and the fixed-frequency test were performed to examine effects of the excitation frequencies on strain self-sensing properties of *** fractional change in capacitance(FCC)and resistance(FCR)of CBSS are frequency-dependent in the frequency range from 100 Hz to the f_(B),but frequency-independent in the frequency range from the f_(B)to 300 *** f_(A)and the f_(B)are 1.7-4.0 kHz and 11-78 kHz depending on the fiber dosages,*** and FCR reach their maximum at the f_(A)and 100 Hz,*** responses of capacitance and resistance of CBSS to strain show good repeatability during cyclic *** the fiber dosage increases,capacitance-based sensitivity to strain increases initially and then decreases at the f_(A),and resistance-based sensitivity to strain of CBSS increases with increasing fiber co.tents.

关键词： UHPC strain self-sensing capacitance-based frequency-dependent

Effects of power on ion behaviors in radio-frequency magnetron sputtering of indium tin oxide(ITO)

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Plasma Science and Technology 2024年第7期26卷 116-122页

作者：李茂洋莫超超陈佳丽季佩宇谭海云张潇漫崔美丽诸葛兰剑吴雪梅黄天源 School of Physical Science and Technology Soochow UniversitySuzhou 215000People’s Republic of China Key Lab of Thin Film Materials of Jiangsu Province Suzhou 215000People’s Republic of China suzhou Maxwell Technologies co.Ltd. Suzhou 215000People’s Republic of China School of Optical and Electronic Information Suzhou City University&Suzhou Key Laboratory of BiophotonicsSuzhou 215104People’s Republic of China School of Optoelectronic Science and Engineering Soochow UniversitySuzhou 215000People’s Republic of China Analysis and Testing Center Soochow UniversitySuzhou 215000People’s Republic of China School of Aviation and Transportation Jiangsu College of Engineering and TechnologyNantong 226006People’s Republic of China

This study delves into ion behavior at the substrate position within RF magnetron discharges utilizing an indium tin oxide(ITO)*** positive ion energies exhibit an upward trajectory with increasing RF power,attributed to heightened plasma potential and initial emergent ***,the positive ion flux escalates owing to amplified sputtering rates and electron ***,negative ions exhibit broad ion energy distribution functions(IEDFs)characterized by multiple *** patterns are clarified by a co.bination of radiofrequency oscillation of cathode voltage and plasma potential,alongside ion transport *** elucidation finds validation in a one-dimensional model enco.passing the initial ion *** higher RF power,negative ions surpassing 100 e V escalate in both flux and energy,posing a potential risk of sputtering damages to ITO layers.

关键词： RF magnetron sputtering ITO film ion energy distribution functions plasma diagnosis

Efficient activation of the co.SBA-15catalyst by high-frequency AC-DBD plasma thermal effects for toluene removal

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Plasma Science and Technology 2024年第8期26卷 84-94页

作者：李越姜楠刘政妍秦亮彭邦发王荣刚孙玉荣李杰 School of Environment Dalian University of TechnologyDalian 116024People’s Republic of China School of Electrical Engineering Dalian University of TechnologyDalian 116024People’s Republic of China co.lege of Electrical and power Engineering Taiyuan University of TechnologyTaiyuan 030024People’s Republic of China Canmax Technologies co. Ltd.Suzhou 215121People’s Republic of China

Dielectric barrier discharge(DBD)plasma excited by a high-frequency alternating-current(AC)power supply is widely employed for the degradation of volatile organic co.pounds(VOCs).However,the thermal effect generated during the discharge process leads to energy waste and low energy utilization *** this work,an innovative DBD thermally-co.ducted catalysis(DBD-TCC)system,integrating high-frequency AC-DBD plasma and its generated thermal effects to activate the co.SBA-15 catalyst,was employed for toluene ***,co.SBA-15 catalysts are closely positioned to the ground electrode of the plasma zone and can be heated and activated by the thermal effect when the voltage exceeds 10 k ***12.4 k V,the temperature in the catalyst zone reached 261℃ in the DBD-TCC system,resulting in an increase in toluene degradation efficiency of 17%,co.(2)selectivity of 21.2%,and energy efficiency of 27%,respectively,co.pared to the DBD system *** co.trast,the DBD thermally-unco.ducted catalysis(DBD-TUC)system fails to enhance toluene degradation due to insufficient heat absorption and catalytic activation,highlighting the crucial role of AC-DBD generated heat in the activation of the ***,the degradation pathway and mechanism of toluene in the DBD-TCC system were *** work is expected to provide an energy-efficient approach for high-frequency AC-DBD plasma removal of VOCs.

关键词： high-frequency alternating-current power thermal effect dielectric barrier discharge toluene degradation co.SBA-15 catalysts

Dynamically lithium-co.pensated polymer artificial SEI to assist highly stable lithium-rich manganese-based anode-free lithium metal batteries

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Rare Metals 2024年第6期43卷 2527-2535页

作者： Ming-Ji Peng Jin-Qiu Zhou Ting-Ting Han Yang Zhou Jie Liu Na Xu Zhen-Kang Wang Wen-Bin Lin Cheng-Lin Yan Key Laboratory of co.e Technology of High Specific Energy Battery and Key Materials for Petroleum and Chemical Industry College of EnergySoochow UniversitySuzhou 215006China Light Industry Instituteof Electrochemical power Sources Suzhou 215006China School of Chemistry and Chemical Engineering Nantong UniversityNantong 226019China e-mail:jliu93@*** State Key Laboratory of Space power-Sources Technology Shanghai Institute of Space Power-SourcesShanghai 200245China Centre Energie Materiaux et TélécommunicationsInstitut National de la Recherche ScientifiqueVarennesQC J3X 1S2Canada Zhangjiagang Industrial Technologies Soochow UniversitySuzhou 215006China

Owing to the unique structure,anode-free lithium metal batteries(AFLMBs)have higher energy density and lower production co.t than traditional lithium metal batteries(LMBs)or lithium-ion batteries(LIBs),However,AFLMBs suffer from an inherently finite Li reservoir and exhibit poor cycle stability,low co.lombic efficiency(CE)and severe dendrite *** this work,polydiallyl lithium disulfide(PDS-Li)was successfully synthesized and co.ted on Cu current co.lector by electrochemical *** PDS-Li acts as an additional lithium resource to co.pensate for the irreversible loss of lithium during *** addition,the special structure and lithiophilicity of PDS-Li co.tribute to lower nucleation overpotential and uniform lithium *** co.pled with Li-rich manganese-based(LRM)cathode of Li1.2Mn0.54Ni0.13co..13O2,the anode-free full cell exhibits significantly improved cycle stability over 100 cycles and capacity retention of 63.3%and 57%after 80 and 100 cycles,*** believe that PDS-Li can be used to ensure stable cycling performance and high-energy-density in AFLMBs.

关键词： Anode-free Artificial solid electrolyte interphase(SEI) Lithium metal batteries Lithium-rich cathode Finite element simulation

Work-function-induced interfacial electron redistribution of MoO_(2)/WO_(2) heterostructures for high-efficiency electrocatalytic hydrogen evolution reaction

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Rare Metals 2024年第2期43卷 489-499页

作者： Tong-Fei Li Jing Li Lu-Ping Zhang Jia-Wei Ke Meng-Xing Fan Li-Fang Zhang Cheng-Wei Deng Yi Sun Tao Qian Cheng-Lin Yan School of Chemistry and Chemical Engineering Nantong UniversityNantong226019China Jiangsu Key Laboratory of New power Batteries Jiangsu Collaborative Innovation Centre of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing210023China Aerospace Hydrogen Energy Technology(Shanghai)co.Ltd. Shanghai201800China Key Laboratory of co.e Technology of High Specific Energy Battery and Key Materials for Petroleum and Chemical Industry College of EnergySoochow UniversitySuzhou215006China Light Industry Institute of Electrochemical power Sources Suzhou215006China

The engineering of the electronic co.figurations of active sites,together with the production of more accessible active sites through heterostructure design,has been established as a forceful methodology for boosting water electrolysis ***,a facile approach is developed to fabricate well-dispersed MoO_(2) and WO_(2) nanoparticles with abundant heterointerfaces entrapped in N,P-doped carbon nanofibers(referred to as MoO_(2)/WO_(2)@N,P-CNFs hereafter)as hydrogen evolution reaction(HER)electrocatalysts in alkaline and acidic *** spectrosco.ic analyses and theoretical findings manifest that the heterointerface formed by the work function modulation of MoO_(2)/WO_(2) triggers the spontaneous electron redistribution from MoO_(2)to WO_(2) and a built-in electric field,which is essential to promote water adsorption,optimize the H-intermediate adsorption energy,result in the enhanced charge transfer efficiency,and ultimately increase the intrinsic HER ***,the intimate co.finement of MoO_(2)/WO_(2) heterostructures in the porous carbon substrate can restrain the active sites from unfavorable co.rsening and detachment,thus ensuring facilitated HER kinetics and outstanding structural *** a result,MoO_(2)/WO_(2)@N,P-CNFs exhibit superior catalytic HER performance in acidic and basic solutions,requiring 118 and 95 mV overpotentials to achieve 10 mA·cm^(−2),respectively,surpassing a number of reported non-noble metal-based *** work provides guidelines for the rational design and co.struction of special metallic heteroco.ponents with optimized interfacial electronic structure for various electrochemical technologies.

关键词： Electrospinning MoO_(2)/WO_(2) heterostructure Work function Hydrogen evolution reaction