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arXiv 2025年

作者： Yang, Kun Zhang, Chao Wu, Chengwei Du, Qian Li, Bingzhi Fang, Zhen Li, Liang Wu, Jianbo Wu, Tianru Wang, Hui Deng, Tao Gao, Wenpei State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Future Material Innovation Center Zhangjiang Institute for Advanced Study Shanghai Jiao Tong University Shanghai200240 China School of Physics and Electronics Hunan Key Laboratory of Super Microstructure and Ultrafast Process State Key Laboratory of Powder Metallurgy Central South University Changsha410083 China Research Center for Scientific Data Hub Zhejiang Lab Hangzhou310000 China SKLPPC Shanghai200240 China School of Mechanical Engineering Shanghai Jiao Tong University Shanghai200240 China

Accurate, non-contact temperature measurement with high spatial resolution is essential for understanding thermal behavior in integrated nanoscale devices and heterogeneous interfaces. However, existing techniques are often limited by the need for physical contact or insufficient spatial resolution for the measurement of local temperature and mapping its distribution. Here, we showcase the direct temperature measurement of graphene with nanometer spatial resolution in transmission electron microscopy. In experiments, combining a scanning nanobeam with precession electron diffraction offers the collection of kinemetic diffraction from a local area at the nanometer scale. In analysis, we use a pre-calculated, sample-specific structure-factor-based correction method to enable the linear fitting of the diffraction intensities, allowing the determination of the Debye-Waller factor as a function of temperature at the precision of 10-4Å2/C. With the high spatial resolution and measurement precision, the temperature and thermal vibration mapping further reveal the influence of graphene lattice parameters and thickness on the Debye-Waller factor, providing valuable insights into the vibrational properties impacted by temperature, lattice structure, and graphene layer thickness. Copyright © 2025, The Authors. All rights reserved.

关键词： Crystal lattices

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Interface Engineering and Printing Fabrication for Organic Solar Cells

Interface Engineering and Printing Fabrication for Organic S...

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Taishan Academic Forum on Graphene Nanomaterials and Biomedicine(2014泰山学术论坛——石墨烯纳米材料与生物医药专题)

作者： Junliang YANG Conghua ZHOU Bingchu YANG Yongli GAO Hunan Key Laboratory for Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangshaHunan 410083China Hunan Key Laboratory for Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangshaHunan 410083China Institute of Super-microstructure and Ultrafast Process in Advanced MaterialsSchool of Physics and ElectronicsCentral South UniversityChangshaHunan 410083China Department of Physics and Astronomy University of RochesterRochesterNY 14627USA Institute of Super-microstructure and Ultrafast Process in Advanced Materials School of Physics and ElectronicsCentral South UniversityChangshaHunan 410083China

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Bridging buried interface enable 24.67%-efficiency doctor-bladed perovskite solar cells in ambient condition

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Nano Research 2024年第9期17卷 8068-8076页

作者： Jianhui Chang Erming Feng Xiangxiang Feng Hengyue Li Yang Ding Caoyu Long Siyuan Lu Haixia Zhu Wen Deng Jiayan Shi Yingguo Yang Si Xiao Yongbo Yuan Junliang Yang Hunan Key Laboratory for Super-microstructure and Ultrafast Process School of PhysicsCentral South UniversityChangsha 410083China Hunan Key Laboratory of Nanophotonics and Devices School of PhysicsCentral South UniversityChangsha 410083China Textile and Fashion Collage Hunan Institute of EngineeringXiangtan 411101China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

Scalable deposition of high-efficiency perovskite solar cells(PSCs)is critical to accelerating their commercial ***,a significant number of defects are distributed at the buried interface of perovskite film fabricated by scalable deposition,exhibiting much negative influence on the efficiency and stability of ***,2-(N-morpholino)ethanesulfonic acid potassium salt(MESK)is incorporated as the bridging layer between the tin oxide(SnO_(2))electron transport layer(ETL)and the perovskite film deposited via scalable two-step doctor *** experiment and simulation results demonstrate that MESK can passivate the trap states of Sn suspension bonds,thereby enhancing the charge extraction and transport of the SnO_(2)***,the strong interaction with uncoordinated Pb ions can modulate the crystal growth and crystallographic orientation of perovskite film and passivate buried *** employing MESK interface bridging,PSCs fabricated via scalable doctor blading in ambient condition achieve a power conversion efficiency(PCE)of 24.67%,which is one of the highest PCEs for doctor-bladed PSCs,and PSC modules with an active area of 11.35 cm^(2)achieve a PCE of 19.45%.Furthermore,PSCs exhibit excellent long-term stability,and the unpackaged target device with a storage of 1680 h in ambient condition(25℃and humidity of 30%relative humidity(RH))can maintain more than 90%of the initial *** research provides a strategy for constructing a high-performance interface bridge between SnO_(2)ETL and perovskite film,and achieving efficient and stable large-area PSCs and modules fabricated via scalable doctor-blading process in ambient condition.

关键词： perovskite solar cells doctor blading buried interface defect passivation orientation regulation

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Recent advances in controlling the crystallization of two-dimensional perovskites for optoelectronic device

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Frontiers of physics 2019年第5期14卷 1-17页

作者： Shi-Qiang Luo Ji-Fei Wang Bin Yang Yong-Bo Yuan Hunan Key Laboratory of Super Micro structure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China College of Physic and Electric Information Hunan Institute of Science and TechenologyYueyang 414006China College of Materials Science and Engineering Hunan UniversityChangsha 410082China Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan UniversityChangsha 410082China

Though three-dimensional (3D) organic inorganic halide perovskites (OIHP) is very promising for low cost and distributed PV generation,the stability issue of 3D OIHP is still a problem for its ***-dimensional (2D) perovskites,protected by periodic organic ligands,is promising due to its excellent optoelectronic property and superior ***,2D perovskitc is anisotropic in its crystal structure and optoelectronic properties,and the resulted film is often a mixture of different ***,methods to manipulate 2D perovskitc crystal orientation and its phase separation are *** this review,the major advances on the composition engineering,crystal orientation,phase separa-tion,and inlerfaeial capping are ***,efforts on understanding the formation process of 2D perovskitc crystal arc also discussed,which is important for making full use of 2D perovskitc in functional optoelectronic devices.

关键词： optoelectronic devices perovskite solar cells nanoscale materials chemical vapor deposition

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Stress compensation based on interfacial nanostructures for stable perovskite solar cells

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Interdisciplinary materials 2023年第2期2卷 348-359页

作者： Cheng Zhu Xi Wang Hangxuan Li Chenyue Wang Ziyan Gao Pengxiang Zhang Xiuxiu Niu Nengxu Li Zipeng Xu Zhenhuang Su Yihua Chen Huachao Zai Haipeng Xie Yizhou Zhao Ning Yang Guilin Liu Xueyun Wang Huanping Zhou Jiawang Hong Xingyu Gao Yang Bai Qi Chen Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications MIIT Key Laboratory for Lowdimensional Quantum Structure and DevicesExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijingChina School of Aerospace Engineering Beijing Institute of TechnologyBeijingChina Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijingChina Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghaiChina Hunan Key Laboratory for Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangshaChina School of Science Jiangnan University WuxiWuxiJiangsuChina

The long-term stability issue of halide perovskite solar cells hinders their *** residual stress-strain affects device stability,which is derived from the mismatched thermophysical and mechanical properties between adjacent *** this work,we introduced the Rb_(2)CO_(3)layer at the interface of SnO_(2)/perovskite with the hierarchy morphology of snowflake-like microislands and dendritic *** a suitable thermal expansion coefficient,the Rb_(2)CO_(3)layer benefits the interfacial stress relaxation and results in a compressive stress-strain in the perovskite ***,reduced nonradiative recombination losses and optimized band alignment were *** enhancement of open-circuit voltage from 1.087 to 1.153 V in the resultant device was witnessed,which led to power conversion efficiency(PCE)of 22.7%(active area of 0.08313 cm^(2))and 20.6%(1 cm2).Moreover,these devices retained 95%of its initial PCE under the maximum power point tracking(MPPT)after 2700 *** suggests inorganic materials with high thermal expansion coefficients and specific nanostructures are promising candidates to optimize interfacial mechanics,which improves the operational stability of perovskite cells.

关键词： interfacial nanostructures long-term stability perovskite solar cells strain engineering thermal expansion coefficient

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Effects of Van der Waals interaction and electric field on the electronic structure of bilayer MoS2

Effects of Van der Waals interaction and electric field on t...

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第十二届全国量子化学会议

作者： Jin Xiao Mengqiu Long Xinmei Li Qingtian Zhang Hui Xu K.S.Chan Department of Physics and Materials Science City University of Hong KongHong KongChina Department of Physics and Materials ScienceCity University of Hong KongHong KongChina Institute of Super-microstructure and Ultrafast Process in Advanced Materials School of Physics and ElectronicsCentral South UniversityChangsha 410083China Institute of Super-microstructure and Ultrafast Process in Advanced MaterialsSchool of Physics and ElectronicsCentral South UniversityChangsha 410083China

The modification of the electronic structure of bilayer MoS2 by an external electric field can have potential applications in optoelectronics and ***,the underlying physical mechanism is not clearly understood,especially the effects of the Van der Waals *** this study,the spin orbit coupled electronic structure of bilayer MoS2 has been investigated using the first-principle density functional *** find that the Van der Waals interaction as well as the interlayer distance have significant effects on the band *** the interlayer distance of bilayer MoS2 increases from 0.614 nm to 0.71 nm,the indirect gap between the Γ and T points increases from 1.25 eV to 1.70 ***,the energy gap of bilayer MoS2 transforms from an indirect one to a direct *** external electric filed can shift down(up)the energy bands of the bottom(top)MoS2 layer,and also breaks the inversion symmetry of bilayer *** a result,the electric field can affect the band gap and the spin-orbit interaction splitting are also modified by the external electric field,when the valance bands are split into two groups of *** present study can help us understand more about the electronic structures of MoS2 materials for potential applications in electronics and optoelectronics.

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Highly in-plane anisotropy of thermal transport in suspended ternary chalcogenide Ta_(2)NiS_(5)

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Nano Research 2022年第7期15卷 6601-6606页

作者： Yue Su Chuyun Deng Jinxin Liu Xiaoming Zheng Yuehua Wei Yangbo Chen Wei Yu Xiao Guo Weiwei Cai Gang Peng Han Huang Xueao Zhang College of Physical Science and Technology Xiamen UniversityXiamen 361005China College of Arts and Sciences National University of Defense TechnologyChangsha 410073China College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China Jiujiang Research Institute of Xiamen University Jiujiang 332105China Hunan Key Laboratory of Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China

Energy dissipation has always been an attention-getting issue in modern electronics and the emerging low-symmetry two-dimensional(2D)materials are considered to have broad prospects in solving the energy dissipation *** the thermal transport of a typical 2D ternary chalcogenide Ta_(2)NiS_(5) is *** the first time we have observed strongly anisotropic in-plane thermal conductivity towards armchair and zigzag axes of suspended few-layer Ta_(2)NiS_(5) flakes through Raman *** 7-nm-thick Ta_(2)NiS_(5) flakes,theκz i g z a g is 4.76 W·m^(−1)·K^(−1) andκa r m c h a i r is 7.79 W·m^(−1)·K^(−1),with a large anisotropic ratio(κa r m c h a i r/κz i g z a g)of 1.64 mainly ascribed to different phonon mean-free-paths along armchair and zigzag ***,the thickness dependence of thermal anisotropy is also *** the flake thickness increases,theκa r m c h a i r/κz i g z a g reduces sharply from 1.64 to *** could be attributed to the diversity in phonon boundary scattering,which decreases faster in zigzag direction than in armchair *** anisotropic property enables heat flow manipulation in Ta_(2)NiS_(5) based devices to improve thermal management and device *** work helps reveal the anisotropy physics of ternary transition metal chalcogenides,along with significant guidance to develop energy-efficient next generation nanodevices.

关键词： anisotropic thermal conductivity ternary transition metal chalcogenide Ta_(2)NiS_(5) energy dissipation phonon mode

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Boosting acidic water oxidation performance by constructing arrays-like nanoporous Ir_(x)Ru_(1−x)O_(2) with abundant atomic steps

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Nano Research 2022年第7期15卷 5933-5939页

作者： Junjie Li Zan Lian Qiang Li Zhongchang Wang Lifeng Liu Francis Leonard Deepak Yanping Liu Bo Li Junyuan Xu Zuxin Chen CAS Key Laboratory of Functional Materials and Devices for Special Environments Xinjiang Technical Institute of Physics&ChemistryChinese Academy of SciencesUrumqi 830011China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China International Iberian Nanotechnology Laboratory(INL) Braga 4715-330Portugal Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Mechanical Engineering University of Shanghai for Science and TechnologyShanghai 200093China School of Physics and Electronics Hunan Key Laboratory for Super-microstructure and Ultrafast ProcessCentral South UniversityChangsha 410083China Laboratory of Advanced Spectro-electrochemistry and Li-ion Batteries Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Institute of Semiconductors South China Normal UniversityGuangzhou 510631China

The fabrication of electrocatalysts with high activity and acid stability for acidic oxygen evolution reaction(OER)is an urgent need,yet extremely ***,we report the design and successful fabrication of a high performance self-supported cogwheel arrays-like nanoporous Ir_(x)Ru_(1−x)O_(2) catalyst with abundant atomic steps for acidic OER using a facile alloy-spinningelectrochemical activation method that allows large-scale *** obtained Ir_(x)Ru_(1−x)O_(2) catalysts merely need overpotentials of 211 and 295 mV to deliver catalytic current densities of 10 and 300 mA·cm^(−2) in 0.5 M H_(2)SO_(4),respectively,and can sustain constant OER electrolysis for at least 140 h at a high current density of 300 mA·cm^(−2).Further density functional theory(DFT)calculations uncover that such high intrinsic activities mainly originate from the largely exposed high-index atomic step planes,which markedly lower the limiting potential of the rate-determining step(RDS)of *** findings provide an insight into the exploration of high performance electrocatalysts,and open up an avenue for further developing the state-of-theart Ir and/or Ru-based catalysts for large-scale practical applications.

关键词： oxygen evolution reaction(OER)electrolysis nanoporous structure Ir_(x)Ru_(1−x)O_(2) defects atomic steps

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Integrated energy storage system based on triboelectric nanogenerator in electronic devices

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Frontiers of Chemical Science and Engineering 2021年第2期15卷 238-250页

作者： Xiao Feng Yang Zhang Le Kang Licheng Wang Chongxiong Duan Kai Yin Jinbo Pang Kai Wang School of Electrical Engineering Qingdao UniversityQingdao 266071China Department of Energy“Galileo Ferraris” Politecnico di TorinoTurin 10129Italy School of Materials Science and Engineering Xi’an University of Science and TechnologyXi’an 710054China School of Information Engineering Zhejiang University of TechnologyHangzhou 310023China School of Materials Science and Energy Engineering Foshan UniversityFoshan 528231China Hunan Key Laboratory of Super Microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410012China Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong Institute for Advanced Interdisciplinary Research(iAIR)University of JinanJinan 250022China

The emergence of electronic devices has brought earth-shaking changes to people's ***,an extemal power source may become indispensable to the electronie devices due to the limited capacity of *** one of the possible solutions for the extermal power sources,the triboelectric nanogenerator(TENG)provides a novel idea to the increasing mumber of personal electronic *** is a new type of energy ollector,which has become a hot spot in the field of *** is widely used at the acquisition and conversion of mechan-ical enegy to electrice energy through the principle of electrostatic *** this basis,the TENG could be integrated with the energy stonage system into a self-powered system,W hich can supply power to the electronic devices and make them work *** this review,TENG's basic structure as well as its working process and working mode are firstly *** integration method of TENGs with enegy storage systems and the related research status are then introduced in *** the end of this paper,we put forward some problems and discuss the prospect in the future.

关键词： electronic devices triboelectrice nanogenerator mechanical energy sel-powered system

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Investigation of Doping C60 with Metal Oxide

Investigation of Doping C60 with Metal Oxide

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第八届全国暨华人有机分子和聚合物发光与光电特性学术会议

作者： Yongli Gao Institute for Super Microstructure and Ultrafast Process in Advanced Materials (ISMUP) Central South University Changsha Hunan the Peoples Republic of China 410083 Department of Physics and Astronomy University of Rochester Rochester NY 14627 USA

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