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Laser-Induced Recoverable Fluorescence Quenching of Perovskite Films at a Microscopic Grain Scale

Energy & Environmental Materials 2022年第4期5卷 1189-1199页

作者： Yuren Xiang Yameng Cao Wenqiang Yang Rui Hu Sebastian Wood Bowei Li Qin Hu Fan Zhang Jujie He Mozhgan Yavari Jinlai Zhao Yunlong Zhao Jun Song Junle Qu Rui Zhu Thomas P.Russell S.Ravi P.Silva Wei Zhang Center for Biomedical Optics and Photonics(CBOP)&College of Physics and Optoelectronic Engineering Key Laboratory of Optoelectronic Devices and SystemsShenzhen UniversityShenzhen 518060China Advanced Technology Institute University of SurreyGuildford GU27XHUK National Physical Laboratory Hampton RoadTeddington TW110LWUK Department of Polymer Science and Engineering University of MassachusettsAmherst MA 01003USA State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China College ofmaterials science and engineering Shenzhen Key laboratory of Polymer Science and TechnologyGuangdong Research Center for interfacial Engineering of FunctionalMaterialsShenzhen UniversityShenzhen 518060China

Understanding the fundamental properties of metal-halide perovskite materials is driving the development of novel optoelectronic ***,we report the observation of a recoverable laser-induced fluorescence quenching phenomenon in perovskite films with a microscopic grain-scale restriction,accompanied by spectral *** fluorescence quenching depends on the laser intensity and the dwell time under Auger recombination dominated *** features indicate that the perovskite lattice deformation may take the main responsibility for the transient and show a new aspect to understand halide perovskite *** further modulate this phenomenon by adjusting the charge carrier recombination and extraction,revealing that efficient carrier transfer can improve the bleaching resistance of perovskite *** results provide future opportunities to attain high-performance devices by tuning the perovskite lattice disorder and harvesting the energetic carriers.

关键词： fluorescence quenching perovskite photophysics stability

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Highly efficient electrocatalytic nitrogen fixation enabled by the bridging effect of Ru in plasmonic nanoparticles

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Nano Research 2023年第1期16卷 360-370页

作者： Hang Yin Jinwu Hu Caihong Fang Yuyang Wang Lixia Ma Nan Zhang Shouren Zhang Ruibin Jiang Jianfang Wang Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119China College of Chemistry and Materials Science The Key Laboratory of Functional Molecular SolidsMinistry of EducationAnhui Laboratory of Molecular-Based MaterialsCenter for Nano Science and TechnologyKey Laboratory of Electrochemical Clean Energy of Anhui Higher Education InstitutesAnhui Normal UniversityWuhu 241000China Henan Provincial Key Laboratory of Nanocomposites and Applications Institute of Nanostructured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou 450006China Department of Physics The Chinese University of Hong KongHong Kong 999077China

Plasmon-generated hot electrons show great potential for driving chemical *** utilization efficiency of hot electrons is highly dependent on the interaction of the electronic states at the interfaces between plasmonic nanoparticles and other materials/*** interaction can produce new hybridized electron states,which permit direct hot-electron transfer,a more efficient transfer ***,Au usually has very weak interaction with most molecules because of its inertness,which makes direct hot-electron transfer ***,the improvement of the hot-electron transfer efficiency from Au to N_(2)is demonstrated by introducing a Ru bridging *** the N_(2)fixation rate and Faradic efficiency(FE)are enhanced by the excitation of *** enhancement of the N_(2)fixation rate is found to arise from plasmon-generated hot *** calculations show that the strong interaction of the Ru electronic states with the N_(2)molecular orbitals produces new hybridized electronic states,and the Ru d electrons also strongly couple with the Au sp *** a bridging role of Ru makes direct hot-electron transfer from Au to N_(2)possible,improving the FE of nitrogen *** findings demonstrate a new approach to increasing the utilization efficiency of plasmonic hot electrons for chemical reactions and will be helpful to the design of plasmonic catalysts in the future.

关键词： electrocatalytic nitrogen fixation Au/Ru electrocatalysts localized surface plasmon resonance electronic state hybridization hot electron

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Enhancing Reliability of Short-Channel Dual Gate InGaZnO Thin Film Transistors by Bottom-Gate Oxide Engineering

IEEE Electron Device Letters

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IEEE Electron Device Letters 2024年第4期45卷 593-596页

作者： Zhou, Kuan-Ju Chang, Ting-Chang Yen, Po-Yu Chen, Yu-An Chien, Ya-Ting Huang, Bo-Shen Lee, Po-Yi Juan, Tzu-Hsuan Sze, Simon M. Fan, Yang-Shun Huang, Chen-Shuo Tsai, Chih-Hung National Sun Yat-sen University Department of Physics Kaohsiung80424 Taiwan National Sun Yat-sen University Department of Physics The College of Semiconductor and Advanced Technology Research Kaohsiung80424 Taiwan National Sun Yat-sen University Department of Materials and Optoelectronic Science Kaohsiung80424 Taiwan AUO Corporation Advanced Process Research Division Hsinchu30078 Taiwan National Yang Ming Chiao Tung University Institute of Electronics Hsinchu30010 Taiwan

Previous studies have reported the formation of n+ regions in amorphous oxide semiconductor (AOS) thin-film transistors (TFTs) upon doping hydrogen (H) to the AOS channel layer from the deposition atmosphere of interlayer dielectrics (ILD) e.g. by hydrogenated plasma-enhanced chemical vapor deposition. In this work, we applied bottom-gate oxide engineering wherein N2O plasma treatment on a bottom-gate oxide suppresses the hydrogen diffusion to the amorphous IGZO (a-IGZO), thus minimizing the short-channel effect. The lateral hydrogen diffusion length can be remarkably reduced results show that the use of bottom-gate oxide engineering improved the reliability of the IGZO TFTs. © 1980-2012 IEEE.

关键词： Thin film transistors

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Progress in the preparation and physical properties of two-dimensional Cr-based chalcogenide materials and heterojunctions

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Frontiers of physics 2024年第2期19卷 105-130页

作者： Xiulian Fan Ruifeng Xin Li Li Bo Zhang Cheng Li Xilong Zhou Huanzhi Chen Hongyan Zhang Fangping OuYang Yu Zhou School of Physics and Electronics Hunan Key Laboratory of Nanophotonics and DevicesCentral South UniversityChangsha 410083China Jincheng Research Institute of Opto-mechatronics Industry Jincheng 048000China Shanxi Key Laboratory of Advanced Semiconductor Optoelectronic Devices and Integrated Systems Jincheng 048000China School of Physical Science and Technology Xinjiang UniversityUrumqi 830046China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

Two-dimensional transition metal dichalcogenides(TMDs)exhibit promising application prospects in the domains of electronic devices,optoelectronic devices and spintronic devices due to their distinctive energy band structures and spin−orbit coupling ***-based chalcogenides with narrow or even zero bandgap,covering from semiconductors to metallic materials,have considerable potential for wide-band photodetection and two-dimensional ***,the preparation of 2D CrX_(n)(X=S,Se,Te)nanosheets primarily relies on chemical vapor deposition(CVD)and molecule beam epitaxy(MBE),which enable the production of high-quality large-area *** review article focuses on recent progress of 2D Cr-based chalcogenides,including unique crystal structure of the CrX_(n)system,phase-controlled synthesis,and heterojunction ***,a detailed introduction of room-temperature ferromagnetism and electrical/optoelectronic properties of 2D CrXn is ***,this paper summarizes the challenges associated with utilizing 2D Cr-based chalcogenides in preparation strategies,optoelectronics devices,and spintronic devices while providing further insights.

关键词： physical properties two-dimensional materials Cr-based chalcogenide controlled synthesis heterojunction eletronic and optoelectronic devices

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Hi'CT:a pixel sensor-based device for ion tomography

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Nuclear science and Techniques 2023年第7期34卷 231-241页

作者： Yi-Lun Chen Hong-Kai Wang Shi-Yu Zhang Hai-Bo Yang Cheng-Xin Zhao Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Department of Radiation Oncology National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516003China

Carbon ions,commonly referred to as particle therapy,have become increasingly popular in the last *** predicting the range of ions in tissues is important for the precise delivery of doses in heavy-ion *** uncertainty is currently the largest contributor to dose uncertainty in normal tissues,leading to the use of safety margins in treatment *** potential method is the direct relative stopping measurement(RSP)with ***-ion CT(Hi′CT),a compact segmented full digital tomography detector using monolithic active pixel sensors,was designed and evaluated using a 430 MeV/u high-energy carbon ion pencil beam in *** precise position of the individual carbon ion track can be recorded and reconstructed using a 30μm×30μm small pixel pitch *** types of customized image reconstruction algorithms were developed,and their performances were evaluated using three different modules of CAT-PHAN 600-series *** RSP measurement accuracy of the tracking algorithm for different types of materials in the CTP404 module was less than 1%.In terms of spatial resolution,the tracking algorithm could achieve a 20%modulation transfer function normalization value of CTP528 imaging results at 5 lp/cm,which is significantly better than that of the fast imaging algorithm(3 lp/cm).The density resolution obtained using the tracking algorithm of the customized CTP515 was approximately 10.5%.In conclusion,a compact digital Hi'CT system was designed,and its nominal performance was evaluated in a *** RSP resolution and image quality provide potential feasibility for scanning most parts of an adult body or pediatric patient,particularly for head and neck tumor treatment.

关键词： Heavy-ion imaging Computed tomography Silicon pixel detectors Monte Carlo Phantoms Radiotherapy Image-guided Tracking

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GSH-activatable copper-elsinochrome off-on photosensitizer for combined specific NIR-II two-photon photodynamic/chemodynamic therapy

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Chinese Chemical Letters 2025年第3期36卷 322-327页

作者： Zekun Gao Xiuli Zheng Weimin Liu Jie Sha Shuaishuai Bian Haohui Ren Jiasheng Wu Wenjun Zhang Chun-Sing Lee Pengfei Wang Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU-CAS Joint Laboratory of Functional Materials and Devices Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China Center of Super-Diamond and Advanced Films(COSDAF)&Department of Materials Science and Engineering City University of Hong KongHong Kong SAR 999077China

The complexity of cancer therapy has led to the emergence of combination therapy as a promising approach to enhance treatment efficacy and *** integration of glutathione(GSH)-activatable two-photon photodynamic therapy(TP-PDT)and chemodynamic therapy(CDT)offers the possibility to advance precision and efficacy in anti-cancer *** this study,a GSH-activatable photosensitizer(PS),namely copper-elsinochrome(CuEC),is synthesized and utilized for combination second nearinfrared(NIR-II)TP-PDT/*** Cu^(2+)acts as a“lock”,suppressing the fluorescence and^(1)O_(2)generation ability of EC in a normal physiological environment(“OFF”state).However,the overexpressed GSH in the tumor microenvironment acts as the“key”,resulting in the release of EC(“ON”state)and Cu^(+)(reduced by GSH).The released EC can be utilized for fluorescence imaging and TP-PDT under NIR-II(λ=1000 nm)two-photon excitation,while Cu+can generate highly toxic hydroxyl radicals(•OH)via Fenton-like reaction for ***,this process consumes GSH and diminishes the tumor’s antioxidant capacity,thereby augmenting the efficacy of combination *** CuEC achieves significant tumor cell ablation in both 2D monolayer cells and 3D multicellular tumor spheres through the combination of NIR-II TP-PDT and CDT.

关键词： GSH activation Copper-elsinochrome photosensitizer Reactive oxygen species NIR-II two-photon photodynamic therapy Chemodynamic therapy

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The role ofγ-C_(2)H_(5)NO_(2) as a new transient liquid phase in cold sintering process of BaTiO_(3) composites

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Journal of advanced Ceramics 2024年第7期13卷 942-955页

作者： Jitrawan Noisak Pimchanok Ieamviteevanich Thitirat Charoonsuk Phakkhananan Pakawanit Nattapong Pinpru Wanwilai Vittayakorn Tosapol Maluangnont Panpailin Seeharaj Theerachai Bongkarn Te-Wei Chiu Naratip Vittayakorn Advanced Materials Research Unit School of ScienceKing Mongkut’s Institute of Technology LadkrabangBangkok 10520Thailand Department of Chemistry School of ScienceKing Mongkut’s Institute of Technology LadkrabangBangkok 10520Thailand Department of Materials Science Faculty of ScienceSrinakharinwirot UniversityBangkok 10110Thailand Synchrotron Research and Applications Division Synchrotron Light Research InstituteNakhon Ratchasima 30000Thailand Sustainability Centre Plastics Market Intelligent DepartmentPlastics Institute of ThailandBangkok 10110Thailand Electroceramics Research Laboratory College of Materials Innovation and TechnologyKing Mongkut's Institute of Technology LadkrabangBangkok 10520Thailand Department of Physics Faculty of ScienceNaresuan UniversityPhitsanulok 65000Thailand Research Center for Academic Excellence in Applied Physics Faculty of ScienceNaresuan UniversityPhitsanulok 65000Thailand Department of Materials and Mineral Resources Engineering "National"Taipei University of TechnologyTaipei 106TaiwanChina

Dielectric materials,such as barium titanate(BT)-based materials,have excellent dielectric properties but require high temperatures(above 1300℃)for ceramic fabrication,leading to high costs and energy *** cold sintering process(CSP)offers a solution to these issues and is gaining worldwide attention as an innovative fabrication *** this work,we proposed an alternative organic ferroelectric phase,gamma-glycine(γ-GC),which acts as a transient liquid phase to fabricate high-density composites with barium titanate(BT)at low temperatures through *** findings show that the density of 15γ-GC/85BT reached 96.7%±1.6%when it was sintered at 120℃for 6 h under 10 MPa uniaxial *** electron microscopy‒energy dispersive X-ray spectroscopy(SEM‒EDS)mappings of the composite suggested thatγ-GC completely underwent the precipitation-dissolution process and,therefore,filled between BT ***,X-ray diffraction(XRD)and Fourier-transform infrared spectroscopy(FTIR)confirmed the preservation ofγ-GC without undesired phase *** addition,the ferroelectric and dielectric properties ofγ-GC/BT composites have been *** high dielectric constant(ε_(r))was 3600,and the low dielectric loss(tanδ)was 1.20 at 200℃and 100 kHz for the 15γ-GC/85BT *** hysteresis loop showed a remanent polarization(P_(r))of 0.55µC·cm^(−2)and a coercive field(E_(c))of 7.25 kV·cm^(−1).Our findings reaffirmed that an organic ferroelectric material(γ-GC)can act as a transient liquid phase in a CSP that can successfully and sustainably fabricateγ-GC/BT composites at low temperatures while delivering outstandingly high performance.

关键词： gamma-glycine(γ-GC) barium titanate(BT) cold sintering process organic ferroelectric materials dielectric properties ferroelectric properties

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Experimental research on UAV target tracking in complex background based on polarization imaging 8

Experimental research on UAV target tracking in complex back...

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8th Symposium on Novel Photoelectronic Detection technology and Applications

作者： Qian, Dai Yu, Ning Wenjing, Zhang Yu, Cao College of Advanced Interdisciplinary Studies National University of Defense Technology China School of Mathematics & Physics Qingdao University of Science & Technology China

ISBN: (数字)9781510653122

ISBN: (纸本)9781510653115

The existing target tracking methods are susceptible to the interference from complex backgrounds and have poor robustness. The maturity of real-time polarization imaging technology has expanded the dimensions of targets from the light intensity and spectral to polarization state, which can enhance the detection capability for concealed, camouflaged, and special material targets. The existing target tracking algorithms were used to verify the feasibility of the method for detection and tracking of UAV (Unmanned Aerial Vehicle) based on polarization imaging in three typical backgrounds (sky, building, and jungle). Experiments showed that under the background of the sky and buildings, the polarization image could track the UAV robustly and quickly. The tracking speed was about 2-3 times higher than that of ordinary grayscale images. The success rate was about doubled when the effect of ordinary grayscale images did not work well. Under the background of complex jungle, the effect of images of DoLP (Degree of Linear Polarization) was better than that of images of AoP (Angle of Polarization), but their robustness was weaker than ordinary grayscale images. © 2022 SPIE

关键词： Unmanned aerial vehicles (UAV)

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Dynamic mesophase transition induces anomalous suppressed and anisotropic phonon thermal transport

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npj Computational Materials 2024年第1期10卷 239-248页

作者： Linfeng Yu Kexin Dong Qi Yang Yi Zhang Zheyong Fan Xiong Zheng Huimin Wang Zhenzhen Qin Guangzhao Qin State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle College of Mechanical and Vehicle EngineeringHunan UniversityChangsha410082People’s Republic of China College of Physical Science and Technology Bohai UniversityJinzhou121013People’s Republic of China Hunan Key Laboratory for Micro-Nano Energy Materials&Device and School of Physics and Optoelectronics Xiangtan UniversityXiangtan411105 HunanChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhou450001China Research Institute of Hunan University in Chongqing Chongqing401133China Greater Bay Area Institute for Innovation Hunan UniversityGuangzhou511300 Guangdong ProvinceChina

The physical/chemical properties undergo significant transformations in the different states arising from phase ***,due to the lack of a dynamic perspective,transitional mesophases are largely underexamined,constrained by the high resource burden of first ***,usingmolecular dynamics(MD)simulations empowered by the machine-learning potential,we proffer an innovative paradigm for phase transition:regulating the thermal transport properties via the transitional mesophase triggered by a uniaxial force *** investigate the mechanical,electrical,and thermal transport properties of the two-dimensional carbon allotrope of Janus-graphene with strain-engineered phase ***,we found that the transitional mesophase significantly suppresses the thermal conductivity and induces strong anisotropy near the phase transition *** machine-learning-driven MD simulations,we achieved highprecision atomic-level simulations of *** results show that thermal vibrationinduced intermediate amorphous or interfacial phases induce strong and anisotropic interfacial thermal *** investigation not only endows uswith a novel perspective onmesophases during phase transitions but also enhances our holistic comprehension of the evolution of material properties.

关键词： thermal transition transport

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Stimulating and harnessing circularly polarized luminescence of helically assembled carbonized polymer dots via interfacial dynamics

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Aggregate 2023年第4期4卷 100-110页

作者： Jiaying Lin Rulin Liu Peixian Chen Yangfei Lv Junjie Hao Meijuan Chen Dongxiang Zhang Ruikun Pan Yiwen Li Xi Zhu Tingchao He Jiaji Cheng School of Materials Science and Engineering Hubei UniversityWuhanHubeiChina College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhenGuangdongChina School of Science and Engineering The Chinese University of Hong KongShenzhen Institute of Artificial Intelligence and Robotics for Society(AIRS)ShenzhenGuangdongChina Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhenGuangdongChina

Stimulating and harnessing circularly polarized luminescence(CPL)is not only a sine qua non for fundamentally unveiling chirogenesis in physical chemistry,but also a pivotal prerequisite for implementation of such phenomenon in research fields including chiral optoelectronics and ***,red-emissive carbonized polymer dots(CPDs)-based helical structures were synthesized in this work via biomolecule-tailored organic–inorganic co-assembly *** surface statesrelated chirality exhibits enhanced circular dichroism(CD)and CPL activities with anisotropic factors as high as gCD,max=5.4×10^(−3) and glum,max=1.5×10^(−2),*** obtained CPL signals can be further manipulated in an excitationdependent manner,indicating that a synergistic-competition phenomenon exists between configurational chirality and intermolecular energy-transfer dynamics,which is further supported by simulations based on density function theory(DFT).Such tunable CPL behavior triggers revolutionary designs and applications of these chiral CPDs into the realm of chirality-related biological issues and next-generation chiral optoelectronics.

关键词： carbonized polymer dots circular dichroism circularly polarized luminescence organic-inorganic coassembly synergistic-competition

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