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Elastic scattering of ^(13)C and ^(14)C isotopes on a ^(208)Pb target at energies of approximately five times the Coulomb barriers

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Chinese physics C 2024年第3期48卷 65-71页

作者：杨过段芳芳王康杨彦云孙志宇 Valdir Guimarães 庞丹阳陈文棣金磊许世伟马军兵马朋白真汪凌昊刘泉王惠仁吕冰锋郭松 Mukhi Kumar Raju 王秀华李荣华张玉虎周小红胡正国徐瑚珊 CAS Key Laboratory of High Precision Nuclear Spectroscopy Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100080China Instituto de Física Universidade de São PauloRua do Matão1371São Paulo 05508-090SPBrazil School of Physics and Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Physics Science and Engineering Tongji UniversityShanghai 200092China School of physics and Optoelectronic Engineering Anhui UniversityHefei 230601China Department of Physics GITAM School of ScienceGITAM UniversityVisakhapatnam 530045India

The elastic scattering angular distributions of ^(13)C at 340 MeV and ^(14)C at 294 MeV and 342 MeV on a ^(208)Pb target,which correspond to approximately five times the Coulomb barriers,were measured at the Radioactive Ion Beam Line in *** data were analyzed within the optical model and continuum-discretized coupled-channels(CDCC)framework,and the results of both calculations could effectively account for the experimental *** differential cross sections of elastic scattering revealed no particular suppression at the Coulomb nuclear interference peak angles,suggesting that the breakup coupling effects on the elastic scattering angular distributions were negligibly small in this incident energy *** contributions from the couplings with inelastic states to the elastic cross sections were of minor importance within the angular range covered by these experiments.

关键词： elastic scattering radioactive ion beam angular distribution optical model coupling effects

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Coupling Co-Ni phosphides for energy-saving alkaline seawater splitting

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Nano Research 2024年第6期17卷 4797-4806页

作者： Weijia Liu Wenxian Liu Tong Hou Junyang Ding Zhigui Wang Ruilian Yin Xingyuan San Ligang Feng Jun Luo Xijun Liu State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Nonferrous Metals and Featured MaterialsMOE Key Laboratory of New Processing Technology for Nonferrous Metals and MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China Hebei Key Laboratory of Optic-electronic Information and Materials the College of Physics Science and TechnologyHebei UniversityBaoding 071002China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaShenzhen 518110China

The coupling of energy-saving small molecule conversion reactions and hydrogen evolution reaction(HER)in seawater electrolytes can reduce the energy consumption of seawater electrolysis and mitigate chlorine corrosion ***,the fabrication of efficient multifunctional catalysts for this promising technology is of great ***,a heterostructured catalyst comprising CoP and Ni_(2)P on nickel foam(CoP/Ni_(2)P@NF)is reported for hydrazine oxidation(HzOR)-assisted alkaline seawater *** coupling of CoP and Ni_(2)P optimizes the electronic structure of the active sites and endows excellent electrocatalytic performance for HzOR and ***,the two-electrode HzOR-assisted alkaline seawater splitting(OHzS)cell based on the CoP/Ni_(2)P@NF required only 0.108 V to deliver 100 mA·cm^(−2),much lower than 1.695 V for alkaline seawater electrolysis ***,the OHzS cell exhibits satisfactory stability over 48 h at a high current density of 500 mA·cm^(−2).Furthermore,the CoP/Ni_(2)P@NF heterostructured catalyst also efficiently catalyzed glucose oxidation,methanol oxidation,and urea oxidation in alkaline seawater *** work paves a path for high-performance heterostructured catalyst preparation for energy-saving seawater electrolysis for H_(2) production.

关键词： seawater splitting heterostructure electrocatalysis hydrazine oxidation reaction hydrogen evolution reaction

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Probing fragile topology with dislocations

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science Bulletin 2024年第23期69卷 3657-3660页

作者： Ying Wu Zhi-Kang Lin Yating Yang Zhida Song Feng Li Jian-Hua Jiang School of Physics Nanjing University of Science and TechnologyNanjing 210094China School of Physical Science and Technology and Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou 215006China College of Mathematics and Physics Beijing University of Chemical TechnologyBeijing 100029China International Center for Quantum Materials School of PhysicsPeking UniversityBeijing 100871China Hefei National Laboratory Hefei 230088China Collaborative Innovation Center of Quantum Matter Beijing 100871China Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(MOE) School of PhysicsBeijing Institute of TechnologyBeijing 100081China Suzhou Institute for Advanced Research University of Science and Technology of ChinaSuzhou 215123China

Recently,fragile topology[1–11]and its important role in the properties of twisted bilayer graphene[8],non-Abelian topology[9],flat bands[10]and related emergent phases have attracted much attention,and led to discoveries that connect band topology with correlated electron states[11,12]such as superconductivity[12].Interestingly,the band topology can impose constraints on the superconducting order parameters as revealed by recent studies[12].Fragile topological phases are characterized by nontrivial signatures in either the Wilson loops[3,6]or the band representations[2,3,13]but can be connected with some obstructed atomic insulator phases,which are trivial insulators with charge centers away from atoms,via adding some trivial bands[2].It has been shown that fragile topological insulators do not have robust edge states,imposing challenges on their experimental ***,it was proposed that local gauge flux insertion[4]or twisted boundary conditions[14,15]can be a useful tool to probe the fragile ***,neither local gauge flux insertion nor the twisted boundary condition is feasible in genuine condensed matter experimental conditions.

关键词： topology twisted trivial

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Quantum dots enhanced stability of in-situ fabricated perovskite nanocrystals based light-emitting diodes:Electrical field distribution effects

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Fundamental Research 2025年第1期5卷 347-353页

作者： Xulan Xue Menglin Li Zhenjie Liu Chenhui Wang Jincheng Xu Shuangpeng Wang Hanzhuang Zhang Haizheng Zhong Wenyu Ji Key Lab of Physics and Technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin UniversityChangchun 130012China MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China Institute of Applied Physics and Materials Engineering University of MacaoTaipa 999078China

With the development in fabricating efficient perovskite light emitting diodes(PeLEDs),improving the operating stability becomes an urgent *** we report quantum dot(QD)enhanced stability of PeLEDs by introducing CdSe/ZnS core-shell QDs in toluene anti-solvent during in-situ fabrication of FAPbBr3 perovskite nanocrystals(PNCs)*** comparison with PNC films with pristine toluene as the anti-solvent,the as-prepared FAPbBr3 PNC films with a QD monolayer on the surface exhibit improved photoluminescence quantum yield,enhanced photostability and better *** from these advantages,the peak luminance and the maximum external quantum efficiency of the PeLED containing QD monolayer are increased from 6807 cd/m^(2)to 86,670 cd/m^(2)and 2.4%to 7.1%,*** T50 lifetime under the initial luminance of 1021 cd/m^(2)approaches 83 *** on electrical field simulation and transient electroluminescence measurements,the enhanced stability can be mainly attributed to the electrical field redistribution induced by the QD *** work demonstrates that the combination of QDs and perovskites provides an effective strategy to address the operational stability of *** insights into electrical field distribution effect will make great impact on stability improvement of other perovskite based devices.

关键词： Perovskite nanocrystals Quantum dots Electrical field distribution Light-emitting diodes Operational stability

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Ultra-high brightness Micro-LEDs with wafer-scale uniform GaN-on-silicon epilayers

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Light(science & Applications) 2024年第12期13卷 3041-3051页

作者： Haifeng Wu Xiao Lin Qin Shuai Youliang Zhu Yi Fu Xiaoqin Liao Yazhou Wang Yizhe Wang Chaowei Cheng Yong Liu Lei Sun Xinyi Luo Xiaoli Zhu Liancheng Wang Ziwei Li Xiao Wang Dong Li Anlian Pan Key Laboratory for Micro-Nano Physics and Technology of Hunan Province State Key Laboratory of Chemo/Biosensing and ChemometricsHunan Institute of Optoelectronic IntegrationCollege of Materials Science and EngineeringSchool of Physics and ElectronicsHunan University410082 ChangshaChina Innovision Technology(Suzhou)Co.Ltd 215000 SuzhouChina Lattice Power(Jiangxi)Corp. 330029 NanchangChina College of Mechanical and Electrical Engineering Central South University410083 ChangshaChina Beijing Digital Optical Device IC Design Co.Ltd 100015 BeijingChina School of Physics and Electronics Hunan Normal University410081 ChangshaChina

Owing to high pixel density and brightness,gallium nitride(GaN)based micro-light-emitting diodes(Micro-LEDs)are considered revolutionary display technology and have important application prospects in the fields of micro-display and virtual ***,Micro-LEDs with pixel sizes smaller than 10μm still encounter technical challenges such as sidewall damage and limited light extraction efficiency,resulting in reduced luminous efficiency and severe brightness ***,we reported high-brightness green Micro-displays with a 5μm pixel utilizing highquality GaN-on-Si ***-inch wafer-scale uniform green GaN epilayer is first grown on silicon substrate,which possesses a low dislocation density of 5.25×10^(8)cm^(-2),small wafer bowing of 16.7μm,and high wavelength uniformity(standard deviation STDEV<1 nm),scalable to 6-inch *** on the high-quality GaN epilayers,green Micro-LEDs with 5μm pixel sizes are designed with vertical non-alignment bonding *** atomic sidewall passivation method combined with wet treatment successfully addressed the Micro-LED sidewall damages and steadily produced nano-scale surface textures on the pixel top,which unlocked the internal quantum efficiency of the high-quality green GaN-on-Si ***-high brightness exceeding 107 cd/m2(nits)is thus achieved in the green Micro-LEDs,marking the highest reported ***,integration of Micro-LEDs with Si-based CMOS circuits enables the realization of green Micro-LED displays with resolution up to 1080×780,realizing high-definition playback of movies and *** work lays the foundation for the mass production of high-brightness Micro-LED displays on large-size GaN-on-Si epi-wafers.

关键词： sizes uniform luminous

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Recent progress and perspectives on Sb_(2)Se_(3)-based photocathodes for solar hydrogen production via photoelectrochemical water splitting

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Journal of Energy Chemistry 2022年第4期31卷 508-523页

作者： Shuo Chen Tianxiang Liu Zhuanghao Zheng Muhammad Ishaq Guangxing Liang Ping Fan Tao Chen Jiang Tang Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and SystemsCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringSchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026AnhuiChina Wuhan National Laboratory for Optoelectronics(WNLO) School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074HubeiChina

Photoelectrochemical(PEC) cells involved with semiconductor electrodes can simultaneously absorb solar energy and perform chemical reactions, which are considered as an attractive strategy to produce renewable and clean hydrogen energy. Sb_(2)Se_(3) has been widely investigated in constructing PEC photocathodes benefitting of its low toxicity, suitable band gap, superior optoelectronic properties, and outstanding photocorrosion stability. We first present a brief overview of basic concepts and principles of PEC water splitting as well as a comparison between Sb_(2)Se_(3) and other numerous candidates. Then the material characteristics and preparation methods of Sb_(2)Se_(3) are introduced. The development of Sb_(2)Se_(3)-based photocathodes in PEC water splitting with various architectures and engineering efforts(i.e., absorber engineering, interfaces engineering, co-catalyst engineering and tandem engineering) to improve solar-to-hydrogen(STH) efficiency are highlighted. Finally, we debate the possible future directions to further explore the researching fields of Sb_(2)Se_(3)-based photocathodes with a strongly positive outlook in PEC processed solar hydrogen production.

关键词： Sb_(2)Se_(3) Photocathodes Photoelectrochemical Water splitting Solar-to-hydrogen

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Back contact interfacial modification mechanism in highly-efficient antimony selenide thin-film solar cells

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Journal of Energy Chemistry 2023年第5期80卷 256-264,I0007页

作者： Junhui Lin Guojie Chen Nafees Ahmad Muhammad Ishaq Shuo Chen Zhenghua Su Ping Fan Xianghua Zhang Yi Zhang Guangxing Liang Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina Institute of Fundamental and Frontier Science University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Univ Rennes CNRSISCR(Institut des Sciences Chimiques de Rennes)UMR 6226Rennes F-35000France Institute of Photoelectronic Thin Film Devices and Technology and Tianjin Key Laboratory of Thin Film Devices and Technology Nankai UniversityTianjin 300350China

Antimony selenide(Sb_(2)Se_(3))is a potential photovoltaic(PV)material for next-generation solar cells and has achieved great development in the last several *** properties of Sb_(2)Se_(3)absorber and back contact influence the PV performances of Sb_(2)Se_(3)solar ***,optimization of back contact characteristics and absorber orientation are crucial steps in raising the power conversion efficiency(PCE)of Sb_(2)Se_(3)solar *** this work,MoO2was introduced as an intermediate layer(IL)in Sb_(2)Se_(3)solar cells,and comparative investigations were *** growth of(211)-oriented Sb_(2)Se_(3)with large grains was facilitated by introducing the MoO2IL with suitable *** MoO2IL substantially lowered the back contact barrier and prevented the formation of voids at the back contact,which reduced the thickness of the MoSe2interface layer,inhibited carrier recombination,and minimized bulk and interfacial defects in ***,significant optimization enhanced the open-circuit voltage(VOC)of solar cells from 0.481 V to 0.487 V,short-circuit current density(JSC)from 23.81 m A/cm^(2)to 29.29 m A/cm^(2),and fill factor from 50.28%to 57.10%,which boosted the PCE from 5.75%to 8.14%.

关键词： Sb_(2)Se_(3)solar cells MoO_(2)intermediate layer Back contact Defects

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Ligand modulation of active center to promote lead-free Cs_(2)AgInCl_(6)photocatalytic CO_(2)reduction

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Journal of Energy Chemistry 2024年第8期95卷 660-669,I0015页

作者： Baofei Sun Wei Chen Yanyi Huang Daofu Wu Heng Luo Faguang Kuang Hongmei Ran Yichen Liu Liqin Gao Jinchen Zhou Bo Gao Qiang Huang Xiaosheng Tang Key Laboratory of Human Brain Bank for Functions and Diseases of Department of Education of Guizhou Province College of Basic MedicalGuizhou Medical UniversityGuiyang 550025GuizhouChina School of Electromechanical and Automotive Engineering Yantai UniversityYantai 264005ShandongChina State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina College of Optoelectronic Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China Key Laboratory of Optoelectronic Technology&Systems(Ministry of Education) College of Optoelectronic EngineeringChongqing UniversityChongqing 400044China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina

Metal halide perovskites(MHP)are potential candidates for the photocatalytic reduction of CO_(2)due to their long photogenerated carrier lifetime and charge diffusion ***,the conventional long-chain ligand impedes the adsorption and activation of CO_(2)molecules in practical ***,a ligand modulation technology is employed to enhance the photocatalytic CO_(2)reduction activity of lead-free Cs_(2)AgInCl_(6)microcrystals(MCs).The Cs_(2)AgInCl_(6)MCs passivated by Oleic acid(OLA)and Octanoic acid(OCA)are used for photocatalytic CO_(2)*** results show that the surface defects and electronic properties of Cs_(2)AgInCl_(6)MCs can be adjusted through ligand *** with the OLA-Cs_(2)AgInCl_(6),the OCA-Cs_(2)AgInCl_(6)catalyst demonstrated a significant improvement in the catalytic yield of CO and CH_(4).The CO and CH_(4)catalytic yields of OCA-Cs_(2)AgInCl_(6)reached 171.88 and34.15μmol g^(-1)h^(-1)which were 2.03 and 12.98 times higher than those of OLA-Cs_(2)AgInCl_(6),and the total electron consumption rate of OCA-Cs_(2)AgInCl_(6)was 615.2μmol g^(-1)h^(-1)which was 3.25 times higher than that of OLA-Cs_(2)AgInCl_(6).Furthermore,in situ diffuse reflectance infrared Fourier transform spectra revealed the enhancement of photocatalytic activity in Cs_(2)AgInCl_(6)MCs induced by ligand *** study illustrates the potential of lead-free Cs_(2)AgInCl_(6)MCs for efficient photocatalytic CO_(2)reduction and provides a ligand modulation strategy for the active promotion of MHP photocatalysts.

关键词： Surface ligand Photocatalysis CO_(2)reduction Lead-free perovskite Reactive mechanism

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Excitation-mode-selective emission through multiexcitonic states in a double perovskite single crystal

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Light(science & Applications) 2025年第1期14卷 186-196页

作者： Hao Suo Nan Wang Yu Zhang Xin Zhang Jinmeng Xiang Xiaojia Wang Guansheng Xing Dongxu Guo Jiwen Chang Yu Wang Panlai Li Zhijun Wang Yuhai Zhang Bing Chen Shuzhou Li Chongfeng Guo Feng Wang Hebei Key Laboratory of Optic-electronic Information and Materials College of Physics Science&TechnologyHebei UniversityBaoding071002China Department of Materials Science and Engineering City University of Hong KongKowloon999077Hong Kong SARChina State Key Laboratory of Photon-Technology in Western China Energy Institute of Photonics&Photon-TechnologyNorthwest UniversityXi’an710127China Institute for Advanced Interdisciplinary Research University of JinanJinanShandong250022China College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing210023China School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore639798Singapore

Low-dimensional lead-free metal halide perovskites are highly attractive for cutting-edge optoelectronic ***,we report a class of scandium-based double perovskite crystals comprising antimony dopants that can generate multiexcitonic emissions in the ultraviolet,blue,and yellow spectral *** to the zero-dimensional nature of the crystal lattice that minimizes energy crosstalk,different excitonic states in the crystals can be selectively excited by ultraviolet light,X-ray irradiation,and mechanical action,enabling dynamic control of steady/transient-state spectral features by modulating the excitation ***,the transparent crystal exhibits highly efficient white photoluminescence(quantum yield>97%),X-ray excited blue emission with long afterglow(duration>9 h),and high-brightness self-reproducible violet-blue *** findings reveal the exceptional capability of low-dimensional perovskite crystals for integrating various excitonic luminescence,offering exciting opportunities for multi-level data encryption and all-in-one authentication technologies.

关键词： perovskite crystal excited

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Selective hydrogenation improves interface properties of high-k dielectrics on 2D semiconductors

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Nano Research 2022年第5期15卷 4646-4652页

作者： Yulin Yang Tong Yang Tingting Song Jun Zhou Jianwei Chai Lai Mun Wong Hongyi Zhang Wenzhang Zhu Shijie Wang Ming Yang Fujian Provincial Key Laboratory of Optoelectronic Technology and Devices School of Optoelectronic and Communication EngineeringXiamen University of TechnologyXiamen 361024China Department of Applied Physics The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARChina College of Physics and Space Science China West Normal UniversityNanchong 637002China Institute of Materials Research and Engineering Agency for ScienceTechnology and Research(A*STAR)2 Fusionopolis WayInnovis 138634Singapore

The integration of high-k dielectrics with two-dimensional(2D)semiconductors is a critical step towards high-performance nanoelectronics,which however remains challenging due to the high density of interface states and the damage to the monolayer 2D *** this study,we propose a selective hydrogenation strategy to improve the interface properties while the 2D semiconductors are not *** the interface of monolayer molybdenum disulfide(MoS_(2))and silicon nitride as an example,we show substantially improved interface properties for electronic applications after the interfacial hydrogenation,as evidenced by reduced inhomogeneous charge redistribution,increased band offset,and nearly intact electronic properties of MoS_(2).Importantly,this hydrogenation process selectively occurs only at the silicon nitride surface and is compatible with the current semiconductor fabrication *** further show that this strategy is general and applicable to other interfaces between high-k dielectrics and 2D semiconductors such as hafnium dioxide(HfO_(2))on the monolayer MoS_(2).Our results demonstrate a simple yet viable way to improve the integration of high-k dielectrics on a broad range of 2D transition metal disulfide semiconductors,shedding light on practical electronic and optoelectronic applications.

关键词： two-dimensional(2D)materials high-k dielectrics molybdenum disulfide interfacial properties transition metal disulfide(TMD)

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