期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到54篇文章
< 1 2 3 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Synthesis of functional chalcogenide materials for memory/sensing devices and their integration into artificial sensory systems 认领 引用
1
作者 Pengfei Liu Jae Won Heo +9 位作者 Hyeonmin Bong Jinsik Choe Huiyoung Lee Won-Kyu Lee Myung-Gil Kim Donghee Son Joohoon Kang Taeyong Eom Sungjin Park In Soo Kim 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第2期97-138,共42页
With distinctive phase-change and switching properties,chalcogenide materials have emerged as critical components in various cutting-edge technologies.This review attempts to provide an overview of chalcogenide materi... With distinctive phase-change and switching properties,chalcogenide materials have emerged as critical components in various cutting-edge technologies.This review attempts to provide an overview of chalcogenide materials,from their fundamental properties to their diverse applications with focus on memory and sensing technologies,which are indispensable components in human-like electronic artificial sensory systems.After reviewing the synthesis and application of chalcogenide materials with respect to dimensionality,we focus on the key advances in(1)memory devices,including phase-change memory(PCM),ovonic threshold switching(OTS)selectors,and selector-only memory(SOM),and(2)sensing devices,including optical sensors,gas sensors,and neuromorphic sensors.Emphasis will be given on how chalcogenide materials can be integrated into next-generation systems,such as wearable platforms,artificial intelligence,and neuromorphic/quantum computing systems,to meet the growing demands for high-performance memory and multi-functional sensing.We also provide an overview of emerging research trends as well as a comprehensive perspective on the current status of research on chalcogenides.Finally,we attempt to provide insights into how chalcogenides can continue to drive technological breakthroughs in both memory and sensing applications while shaping the future landscape of intelligent systems,smart sensing platforms,and sustainable technology development. 展开更多
关键词 functional chalcogenides materials synthesis device integration artificial sensory system phase-change memory sensing modalities
暂未订购 下载PDF
Comprehensive review of advances in machine-learning-driven optimization and characterization of perovskite materials for photovoltaic devices 认领 引用 被引量：2
2
作者 Bonghyun Jo Wenning Chen Hyun Suk Jung 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第2期298-323,I0007,共26页
Perovskite solar cells(PSCs)have developed rapidly,positioning them as potential candidates for nextgeneration renewable energy sources.However,conventional trial-and-error approaches and the vast compositional parame... Perovskite solar cells(PSCs)have developed rapidly,positioning them as potential candidates for nextgeneration renewable energy sources.However,conventional trial-and-error approaches and the vast compositional parameter space continue to pose challenges in the pursuit of exceptional performance and high stability of perovskite-based optoelectronics.The increasing demand for novel materials in optoelectronic devices and establishment of substantial databases has enabled data-driven machinelearning(ML)approaches to swiftly advance in the materials field.This review succinctly outlines the fundamental ML procedures,techniques,and recent breakthroughs,particularly in predicting the physical characteristics of perovskite materials.Moreover,it highlights research endeavors aimed at optimizing and screening materials to enhance the efficiency and stability of PSCs.Additionally,this review highlights recent efforts in using characterization data for ML,exploring their correlations with material properties and device performance,which are actively being researched,but they have yet to receive significant attention.Lastly,we provide future perspectives,such as leveraging Large Language Models(LLMs)and text-mining,to expedite the discovery of novel perovskite materials and expand their utilization across various optoelectronic fields. 展开更多
关键词 Perovskite solar cell Data-driven machine learning Characterization Perovskite materials
暂未订购 下载PDF
Effects of activator site and microstructure on luminescence properties of Eu3+-activated LiAlB2O5 ceramic phosphor 认领 引用
3
作者 Donglei Wei Yidi Teng +2 位作者 Xifeng Yang Yushen Liu Bo Ram Lee 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第1期75-84,共10页
A comp rehensive understanding of the quantity and nature of activator sites is crucial for studying the luminescence performance of phosphors doped with rare earth activators.This research focuses on Eu3+-doped Li... A comp rehensive understanding of the quantity and nature of activator sites is crucial for studying the luminescence performance of phosphors doped with rare earth activators.This research focuses on Eu3+-doped LiAlB2O5,and Eu3+/Si^(4+) co-doped LiAlB2O5 ceramic phosphors,which were synthesized using a traditional solid-state reaction method.The pure crystalline phase was confirmed by X-ray diffraction(XRD) and Rietveld refinements.The surface characteristics were investigated via scanning electron micros copy(SEM).The luminescence properties such as photoluminescence(PL) spectra,decay curves,CIE color coordinates and quantum efficiency were reported.Site-selective excitation and emission spectra related to the radiative transitions from 7F0 to 5D0 were investigated using a tunable pulsed dye laser(570-590 nm).All samples display a single dominant transition peak at 580.15 nm(17237 cm-1)corresponding to the 7F0 to 5D0 transition,indicating the presence of only one type of Eu3+ center within the lattice.The incorporation of Si^(4+) alongside Eu3+ in LiAlB2O5 not only significantly enhances red luminescence efficiency but also improves thermal stability.The inhomogeneous disorder surrounding the Eu3+ ions,caused by the excess Si4+ occupying Al3+ sites,results in a notable distortion of the crystal field around the Eu3+ centers.This lattice distortion from the substitution of multiple cations effectively increases both the emission efficiency and thermal activation energy of the Eu3+-doped phosphors.The cation disorder was analyzed through the excitation and luminesce nce characteristics in the region of the 5D0 to 7F0 transitions.These findings enhance the potential of using Eu3+ as a probe for investigating the microstructure of rare-earth sites in phosphors. 展开更多
关键词 Rare earths Eu3+ Optical materials Luminescence properties Cation-disorder Semiconductor
暂未订购 下载PDF
Quantitative Defect-Property Correlations in Ti3C2Tx MXenes via Precursor‑Controlled Defect Engineering 认领 引用
4
作者 Tufail Hassan Doyeon Lee +13 位作者 Shabbir Madad Naqvi Myungjae Kim Jung‑Min Oh Sang Woon Park Aamir Iqbal Soo Yeong Cho Zhiwang Hao Noushad Hussain Zubair Khalid Shakir Zaman Xiangmeng Kong Ki‑Min Roh Hanjung Kwon Chong Min Koo 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第8期235-251,共17页
Defect engineering holds great promise for tailoring the multifunctional properties of MXenes.However,quantitative correlations between defect and material performance remain largely unexplored due to the lack of a re... Defect engineering holds great promise for tailoring the multifunctional properties of MXenes.However,quantitative correlations between defect and material performance remain largely unexplored due to the lack of a reliable strategy to precisely control defect densities.Here,we demonstrate that the defect density of Ti3C2Tx MXenes—including titanium and carbon vacancies,substitutional oxygen defects,and the associated lattice strain—is precisely controlled by adjusting carbon stoichiometry during TiC precursor synthesis and aluminum content during Ti3AlC2 MAX formation.The defect densities propagate from precursors to final MXenes,enabling the fabrication of a series of Ti3C2Tx MXenes with systematically controlled defect densities.This allows a quantitative correlation between defect density and multifunctional properties including electrical and thermal conductivities,infrared emissivity,electromagnetic shielding effectiveness,Joule heating performance,and oxidation stability.The defect-minimized Ti3C2Tx MXene exhibits outstanding performance,with an electrical conductivity of 26,000 S cm−1,thermal conductivity of 57 W m−1 K−1,electromagnetic shielding effectiveness of 90.5 dB at 10μm,Joule heating performance of 263℃ at 1.5 V,ultralow infrared emissivity of 0.05,and superior oxidation resistance(activation energy of 72 kJ mol−1).Furthermore,this work establishes a comprehensive quantitative framework linking defect structure to multifunctional performance and stability. 展开更多
关键词 MXenes Defect engineering Vacancies and substitutions defects Defect-property correlation Oxidation resistance
暂未订购 下载PDF
Progress of Materials and Devices for Neuromorphic Vision Sensors 认领 引用 被引量：29
5
作者 Sung Woon Cho Chanho Jo +1 位作者 Yong-Hoon Kim Sung Kyu Park 《Nano-Micro Letters》 SCIE EI CAS CSCD 2022年第12期239-271,共33页
The latest developments in bio-inspired neuromorphic vision sensors can be summarized in 3 keywords:smaller,faster,and smarter.(1)Smaller:Devices are becoming more compact by integrating previously separated component... The latest developments in bio-inspired neuromorphic vision sensors can be summarized in 3 keywords:smaller,faster,and smarter.(1)Smaller:Devices are becoming more compact by integrating previously separated components such as sensors,memory,and processing units.As a prime example,the transition from traditional sensory vision computing to in-sensor vision computing has shown clear benefits,such as simpler circuitry,lower power consumption,and less data redundancy.(2)Swifter:Owing to the nature of physics,smaller and more integrated devices can detect,process,and react to input more quickly.In addition,the methods for sensing and processing optical information using various materials(such as oxide semiconductors)are evolving.(3)Smarter:Owing to these two main research directions,we can expect advanced applications such as adaptive vision sensors,collision sensors,and nociceptive sensors.This review mainly focuses on the recent progress,working mechanisms,image pre-processing techniques,and advanced features of two types of neuromorphic vision sensors based on near-sensor and in-sensor vision computing methodologies. 展开更多
关键词 In-sensor computing Near-sensor computing Neuromorphic vision sensor Optoelectronic synaptic circuit Optoelectronic synapse
暂未订购 下载PDF
Highly active bayberry-like porous silver microparticles for fabricating sintered silver with dispersed nanopores and adjustable Young's modulus 认领 引用 被引量：2
6
作者 Bo-Long Dong Hao-Song Li +7 位作者 Chuan-Qi Dong Xiang-Ji Li Yi-Chen Zhu Yi Fang Bi-Cheng Fu Seung-Boo Jung Wen-Bo Zhu Ming-Yu Li 《Rare Metals》 SCIE EI CAS CSCD 2025年第7期5078-5095,共18页
Silver paste is widely used in power electronics as a die-attach material owing to its low-temperature sinterability,high melting point,and excellent electrical and thermal conductivities in sintered joints.However,ow... Silver paste is widely used in power electronics as a die-attach material owing to its low-temperature sinterability,high melting point,and excellent electrical and thermal conductivities in sintered joints.However,owing to the mismatch in the coefficient of thermal expansion(CTE)between the joints and chip,the high Young's modulus of sintered silver hinders the mitigation of the high thermal stress generated during the operation of power modules,which increases the susceptibility of sintered joints to cracking,thereby leading to potential failure.This study developed a facile approach to synthesizing bayberry-like Ag microparticles(AgMPs)through the in situ assembly of silver nanorods,resulting in a uniform distribution of nanoscale structures and mesopores on the particle surface.These particles exhibited a high specific surface area of 2.5389 m2·g-1,which enhanced theirsintering activity,enabling sintering to occur at 149.7℃.Furthermore,the porous structure of the AgMPs effectively reduced the density of joints formed by sintering AgMP paste,thereby lowering the Young's modulus of the joints.The small grain size and intricate internal substructure of the joints yielded high shear strength,which reached112.50 MPa at 250℃.The Young's modulus could be adjusted,and the pores provided by the AgMPs maintained the Young's modulus within a low range(15.11-29.61GPa),effectively mitigating thermal stress.These new bayberry-like porous AgMPs offer a promising option for die-attach materials in electronic packaging. 展开更多
关键词 Bayberry-like silver particles Nanopores Ag sinter joining Young’s modulus Shear strength
暂未订购 下载PDF
Copper ion-modified oxyl-terminated melem nanodisks for enhanced performance of organic and perovskite solar cells 认领 引用 被引量：1
7
作者 Fengwu Liu Jiacheng Xu +5 位作者 Yongchao Ma Yoomi Ahn Pesi Mwitumwa Hangoma Eunhye Yang Bo Ram Lee Sung Heum Park 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第10期902-913,共12页
The limited charge extraction efficiency and suboptimal energy-level alignment of poly(3,4-ethylenediox ythiophene)polystyrene sulfonate(PEDOT:PSS)as a hole transport layer restrict its performance in solar cell appli... The limited charge extraction efficiency and suboptimal energy-level alignment of poly(3,4-ethylenediox ythiophene)polystyrene sulfonate(PEDOT:PSS)as a hole transport layer restrict its performance in solar cell applications.In this study,we developed effective copper-ion(Cu(Ⅱ))-modified oxyl-terminated melem two-dimensional(2D)nanodisks(Cu(Ⅱ)@OMN)that improved the performance of PEDOT:PSS as a representative hole-transport layer(HTL)in organic and perovskite solar cells.Based on theoretical calculations and experimental data,the interaction between Cu(Ⅱ)@OMN and PEDOT or PSS led to electron redistribution in PEDOT:PSS and the dissociation of PEDOT and PSS,promoting enhanced charge extraction and transfer.In addition,the work function of the Cu(Ⅱ)@OMN-PEDOT:PSS is modified to achieve a more beneficial energy-level alignment,thereby facilitating improved hole transport and inhibited nonradiative recombination.Methylammonium(MA)-based perovskite and organic binary PM6:Y6solar cells achieved power conversion efficiencies(PCEs)of 19.21% and 17.15%,respectively.These PCEs are among the highest reported for MA-based perovskite and binary PM6:Y6 organic solar cells that use 2D nanomaterial-modified PEDOT:PSS,demonstrating the potential of Cu(Ⅱ)@OMN in solar cell applications. 展开更多
关键词 Poly(3,4-ethylenedioxythiophene):poly(styr enesulfonate) Copper ion modification Oxyl-terminated melem Organic solar cells Perovskite solar cells
暂未订购 下载PDF
The key role of Zn in enhancing precipitation kinetics and refinement of Mg17Al12and Mg2Sn phases through trace Na additions 认领 引用 被引量：1
8
作者 Sumi Jo Tae-Hoon Kim +1 位作者 Cheol-Woong Yang Young Min Kim 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第6期2740-2751,共12页
This study investigates zinc’s(Zn)key role in enhancing the precipitation kinetics and refinement of Mg17Al12and Mg2Sn phases in magnesium alloys through trace sodium(Na)additions.Magnesium alloys with varyi... This study investigates zinc’s(Zn)key role in enhancing the precipitation kinetics and refinement of Mg17Al12and Mg2Sn phases in magnesium alloys through trace sodium(Na)additions.Magnesium alloys with varying compositions of aluminum(Al),tin(Sn),Zn,and Na were prepared and aged at 453 K.Microstructural analyses were conducted using transmission electron microscopy(TEM),scanning transmission electron microscopy(STEM),and atom probe tomography(APT).Trace additions of Na significantly enhanced the precipitation responses of both Mg17Al12and Mg2Sn phases.When Zn was co-added with Na,as in the ATZ641N3 alloy(Mg–6Al–4Sn–1Zn–0.3Na),there was a pronounced refinement in precipitate morphology and acceleration of precipitation kinetics.The ATZ641N3 alloy achieved a peak hardness of 103 Hv at 36 hours,compared to 91 Hv at 72 hours for the ATZ641 alloy without Na.The simultaneous addition of Zn and Na led to the formation of Sn–Na–Zn particles that acted as effective nucleation sites for Mg2Sn,promoting aluminum partitioning and accelerating the precipitation of Mg17Al12through Al-rich regions.Additionally,Zn and Na co-segregated within the Mg17Al12phase,reducing misfit strain caused by Zn substitution and improving precipitate stability and refinement.These findings highlight Zn’s critical role,alongside trace Na additions,in refining and accelerating the precipitation of Mg17Al12and Mg2Sn phases,thereby enhancing the age-hardening response of magnesium alloys. 展开更多
关键词 Magnesium alloys Precipitation hardening Trace elements Na and Zn interaction Microstructural refinement
暂未订购 下载PDF
Large Redshifts in Emission and Excitation from Eu2+-Activated Sr2SiO4and Ba2SiO4Phosphors Induced by Controlling Eu2+Occupancy on the Basis on Crystal-Site Engineering 认领 引用 被引量：1
9
作者 Yasushi Sato Hiroki Kuwahara +3 位作者 Hideki Kato Makoto Kobayashi Takaki Masaki Masato Kakihana 《Optics and Photonics Journal》 2015年第11期326-333,共8页
The photoluminescence properties of Eu2+-activated α’-Sr2SiO4 and α’-Ba2SiO4 with a high Eu2+ concentration were investigated. In the case of Sr2-xEuxSiO4, emission was shifted from 585 to 611 nm with increasing t... The photoluminescence properties of Eu2+-activated α’-Sr2SiO4 and α’-Ba2SiO4 with a high Eu2+ concentration were investigated. In the case of Sr2-xEuxSiO4, emission was shifted from 585 to 611 nm with increasing the total Eu2+ concentration (x) from 0.1 to 0.8. This trend was similar to that in Ba2-xEuxSiO4, where the emission was shifted from 513 to 545 nm. The large redshifts in both the excitation and emission spectra were discussed in terms of the Eu2+ occupancies on two kinds of M sites and their local structural changes (M: Sr and Ba). 展开更多
关键词 Photoluminescence Red-Emitting Phosphors Green-Emitting Phosphors Orthosilicates Crystal-Site Engineering
暂未订购 下载PDF
Recent progress of neuromorphic sensory and optoelectronic systems 认领 引用 被引量：1
10
作者 San Nam Donghyun Kang +3 位作者 Jeong-Wan Jo Dong-Won Kang Sung Kyu Park Yong-Hoon Kim 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2025年第4期146-176,共31页
With the rise of artificial intelligence(AI),neuromorphic sensory systems that emulate the five basic human sensations including tactility,audition,olfaction,gustation,and vision have attracted significant attention.I... With the rise of artificial intelligence(AI),neuromorphic sensory systems that emulate the five basic human sensations including tactility,audition,olfaction,gustation,and vision have attracted significant attention.In particular,research on integrating sensors with artificial synapses is being carried out extensively.These studies offer valuable opportunities for making another breakthrough in AI technology,including autonomous systems,real-time monitoring systems,and human-machine interactions.In this review,we introduce promising reports of neuromorphic sensory systems.Specifically,the core sensing material,device architecture,fabrication process,and applications of the proposed systems are presented in detail.Finally,the unsolved challenges and the prospects of neuromorphic sensory systems are discussed. 展开更多
关键词 artificial intelligence neuromorphic sensory system human sensation sensor
暂未订购 下载PDF
Solution-based manufacturing of 2D materials for memristive device applications 认领 引用 被引量：1
11
作者 Kijeong Nam Gwang Ya Kim +3 位作者 Dongjoon Rhee Hyesung Park Deep Jariwala Joohoon Kang 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2025年第5期1-50,共50页
Two-dimensional (2D) materials have attracted significant attention as resistive switching materials for two-terminal non-volatile memory devices, often referred to as memristors, due to their potential for achieving ... Two-dimensional (2D) materials have attracted significant attention as resistive switching materials for two-terminal non-volatile memory devices, often referred to as memristors, due to their potential for achieving fast switching speeds and low power consumption. Their excellent gate tunability in electronic properties also enables hybrid devices combining the functionality of memory devices and transistors, with the possibility of realizing large-scale memristive crossbar arrays with high integration density. To facilitate the use of 2D materials in practical memristor applications, scalable synthesis of 2D materials with high electronic quality is critical. In addition, low-temperature integration for complementary metal oxide semiconductor (CMOS) back-end-of-line (BEOL) integration is important for embedded memory applications. Solution-based exfoliation has been actively explored as a facile, cost-effective method for the mass production and low-temperature integration of 2D materials. However, the films produced from the resulting 2D nanosheet dispersions exhibited poor electrical properties in the early stages of research, thereby hindering their use in electronic devices. Recent progress in the exfoliation process and post-processing has led to significant improvements in the electronic performance of solution-processed 2D materials, driving increased adoption of these materials in memristor research. In this review article, we provide a thorough overview of the progress and current status of memristive devices utilizing solution-processed 2D resistive switching layers. We begin by introducing the electrical characteristics and resistive switching mechanisms of memristors fabricated with conventional materials to lay the groundwork for understanding memristive behavior in 2D materials. Representative solution-based exfoliation and film formation techniques are also introduced, emphasizing the benefits of these approaches for obtaining scalable 2D material films compared to conventional methods such as mechanical exfoliation and chemical vapor deposition. Finally, we explore the electrical characteristics, resistive switching mechanisms, and applications of solution-processed 2D memristive devices, discussing their advantages and remaining challenges. 展开更多
关键词 memristor neuromorphic device 2D materials solution-based manufacturing
暂未订购 下载PDF
Modification strategies improving the electrochemical and structural stability of high-Ni cathode materials 认领 引用
12
作者 Yoon Bo Sim Hami Lee +1 位作者 Junyoung Mun Ki Jae Kim 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第9期185-205,共21页
With the increasing spotlight in electric vehicles,there is a growing demand for high-energy-density batteries to enhance driving range.Consequently,several studies have been conducted on high-energy-density LiNixC... With the increasing spotlight in electric vehicles,there is a growing demand for high-energy-density batteries to enhance driving range.Consequently,several studies have been conducted on high-energy-density LiNixCoyMnzO2cathodes.However,there is a limit to permanent performance deterioration because of side reactions caused by moisture in the atmosphere and continuous microcracks during cycling as the Ni content to express high energy increases and the content of Mn and Co that maintain structural and electrochemical stabilization decreases.The direct modification of the surface and bulk regions aims to enhance the capacity and long-term performance of high-Ni cathode materials.Therefore,an efficient modification requires a study based on a thorough understanding of the degradation mechanisms in the surface and bulk region.In this review,a comprehensive analysis of various modifications,including doping,coating,concentration gradient,and single crystals,is conducted to solve degradation issues along with an analysis of the overall degradation mechanism occurring in high-Ni cathode materials.It also summarizes recent research developments related to the following modifications,aims to provide notable points and directions for post-studies,and provides valuable references for the commercialization of stable high-energy-density cathode materials. 展开更多
关键词 High energy density High-Ni cathode materials Degradation Structural stability Lithium-ion battery
暂未订购 下载PDF
Overcoming voltage issue in bicarbonate electrolysis:Dual mass-transfer pathways for CO2and ions 认领 引用
13
作者 Sae In Suh Youngrok Lee +3 位作者 Jae-young Choi Hansung Kim Hyung-Suk Oh Woong Hee Lee 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第11期427-433,I0011,共7页
The direct electrolysis of CO2-captured liquid,such as bicarbonate,offers economic advantages by eliminating the CO2regeneration step.However,high cell voltages remain a major barrier.Herein,we propose a new str... The direct electrolysis of CO2-captured liquid,such as bicarbonate,offers economic advantages by eliminating the CO2regeneration step.However,high cell voltages remain a major barrier.Herein,we propose a new strategy to build dual mass-transfer pathways for CO2and ions using a carbon and anion exchange ionomer(AEI)to reduce cell voltages while achieving sufficient Faradaic efficiency(FE)for the CO2reduction reaction.By optimizing the interposer materials and ratio of carbon,Ag,and AEI,sufficient FECO(57%)and low cell voltages(3.17 V)were achieved at 100 mA cm-2.The formation of dual masstransfer pathways in bicarbonate electrolysis was confirmed through in situ/operando visualization studies.To ensure stability,we recommend the generation of dual mass-transfer pathways using chemically and physically stable materials.Our work provides an understanding of the mass transfer in bicarbonate electrolysis and a direction for overcoming the voltage issue. 展开更多
关键词 CO2electroreduction Bicarbonate reduction CO2capture solution Mass transfer Ion transfer Voltage
暂未订购 下载PDF
Artificial intelligence high-throughput prediction building dataset to enhance the interpretability of hybrid halide perovskite bandgap 认领 引用
14
作者 Wenning Chen Jungchul Yun +6 位作者 Doyun Im Sijia Li Kelvian T.Mularso Jihun Nam Bonghyun Jo Sangwook Lee Hyun Suk Jung 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第10期649-661,共13页
The bandgap is a key parameter for understanding and designing hybrid perovskite material properties,as well as developing photovoltaic devices.Traditional bandgap calculation methods like ultravioletvisible spectrosc... The bandgap is a key parameter for understanding and designing hybrid perovskite material properties,as well as developing photovoltaic devices.Traditional bandgap calculation methods like ultravioletvisible spectroscopy and first-principles calculations are time-and power-consuming,not to mention capturing bandgap change mechanisms for hybrid perovskite materials across a wide range of unknown space.In the present work,an artificial intelligence ensemble comprising two classifiers(with F1 scores of 0.9125 and 0.925)and a regressor(with mean squared error of 0.0014 eV)is constructed to achieve high-precision prediction of the bandgap.The bandgap perovskite dataset is established through highthroughput prediction of bandgaps by the ensemble.Based on the self-built dataset,partial dependence analysis(PDA)is developed to interpret the bandgap influential mechanism.Meanwhile,an interpretable mathematical model with an R2of 0.8417 is generated using the genetic programming symbolic regression(GPSR)technique.The constructed PDA maps agree well with the Shapley Additive exPlanations,the GPSR model,and experiment verification.Through PDA,we reveal the boundary effect,the bowing effect,and their evolution trends with key descriptors. 展开更多
关键词 Artificial intelligence High-throughput Perovskite bandgap Partial dependence analysis Model interpretability
暂未订购 下载PDF
Enhanced stability and linearly polarized emission from CsPbI3perovskite nanoplatelets through A-site cation engineering 认领 引用
15
作者 Woo Hyeon Jeong Junzhi Ye +11 位作者 Jongbeom Kim Rui Xu Xinyu Shen Chia-Yu Chang Eilidh L.Quinn Hyungju Ahn Myoung Hoon Song Peter D.Nellist Henry J.Snaith Yunwei Zhang Bo Ram Lee Robert L.Z.Hoye 《Light: Science & Applications》 SCIE EI CAS CSCD 2026年第2期460-470,共11页
The anisotropy of perovskite nanoplatelets(PeNPLs)opens up many opportunities in optoelectronics,including enabling the emission of linearly polarized light.But the limited stability of PeNPLs is a pressing challenge,... The anisotropy of perovskite nanoplatelets(PeNPLs)opens up many opportunities in optoelectronics,including enabling the emission of linearly polarized light.But the limited stability of PeNPLs is a pressing challenge,especially for red-emitting CsPbI3.Herein,we address this limitation by alloying formamidinium(FA)into the perovskite cuboctahedral site.Unlike Cs/FA alloying in bulk thin films or nanocubes,FA incorporation in nanoplatelets requires meticulous control over the reaction conditions,given that nanoplatelets are obtained in kinetically-driven growth regimes instead of thermodynamically-driven conditions.Through in-situ photoluminescence(PL)measurements,we find that excess FA leads to uncontrolled growth,where phase impurities and nanoplatelets of multiple thicknesses co-exist.Restricting the FA content to up to 25%Cs substitution enables monodisperse PeNPLs,and increases the PL quantum yield(from 53%to 61%),exciton lifetime(from 18 ns to 27 ns),and stability in ambient air(from~2 days to>7 days)compared to CsPbI3.This arises due to hydrogen bonding between FA and the oleate and oleylammonium ligands,anchoring them to the surface to improve optoelectronic properties and stability.The reduction in non-radiative recombination,improvement in the nanoplatelet aspect ratio,and higher ligand density lead to FA-containing PeNPLs more effectively forming edge-up superlattices,enhancing the PL degree of linear polarization from 5.1%(CsPbI3)to 9.4%(Cs0.75FA0.25PbI3).These fundamental insights show how the stability limitations of PeNPLs could be addressed,and these materials grown more precisely to improve their performance as polarized light emitters,critical for utilizing them in next-generation display,bioimaging,and communications applications. 展开更多
关键词 perovskite nanoplatelets penpls opens cspbi site cation engineering emission linearly polarized lightbut perovskite cuboctahedral nanoplatelets linearly polarized emission thin films
暂未订购 下载PDF
Multifunctional MXene/Carbon Nanotube Janus Film for Electromagnetic Shielding and Infrared Shielding/Detection in Harsh Environments 认领 引用 被引量：9
16
作者 Tufail Hassan Aamir Iqbal +14 位作者 Byungkwon Yoo Jun Young Jo Nilufer Cakmakci Shabbir Madad Naqvi Hyerim Kim Sungmin Jung Noushad Hussain Ujala Zafar Soo Yeong Cho Seunghwan Jeong Jaewoo Kim Jung Min Oh Sangwoon Park Youngjin Jeong Chong Min Koo 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第10期543-560,共18页
Multifunctional,flexible,and robust thin films capable of operating in demanding harsh temperature environments are crucial for various cutting-edge applications.This study presents a multifunctional Janus film integr... Multifunctional,flexible,and robust thin films capable of operating in demanding harsh temperature environments are crucial for various cutting-edge applications.This study presents a multifunctional Janus film integrating highly-crystalline Ti3C2Tx MXene and mechanically-robust carbon nanotube(CNT)film through strong hydrogen bonding.The hybrid film not only exhibits high electrical conductivity(4250 S cm-1),but also demonstrates robust mechanical strength and durability in both extremely low and high temperature environments,showing exceptional resistance to thermal shock.This hybrid Janus film of 15μm thickness reveals remarkable multifunctionality,including efficient electromagnetic shielding effectiveness of 72 dB in X band frequency range,excellent infrared(IR)shielding capability with an average emissivity of 0.09(a minimal value of 0.02),superior thermal camouflage performance over a wide temperature range(−1 to 300℃)achieving a notable reduction in the radiated temperature by 243℃ against a background temperature of 300℃,and outstanding IR detection capability characterized by a 44%increase in resistance when exposed to 250 W IR radiation.This multifunctional MXene/CNT Janus film offers a feasible solution for electromagnetic shielding and IR shielding/detection under challenging conditions. 展开更多
关键词 MXene/carbon nanotube Janus film Electromagnetic interference shielding Infrared shielding Thermal camouflage Infrared detection
暂未订购 下载PDF
Microstructure and mechanical property of A356 based composite by friction stir processing 认领 引用 被引量：7
17
作者 Don-Hyun CHOI Yong-Hwan KIM +2 位作者 Byung-Wook AHN Yong-Il KIM Seung-Boo JUNG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第2期335-340,共6页
Friction stir processing （FSP） was used to incorporate SiC particles into the matrix of A356 Al alloy to form composite material. Constant tool rotation speed of 1800 r/min and travel speed of 127 mm/min were used i... Friction stir processing （FSP） was used to incorporate SiC particles into the matrix of A356 Al alloy to form composite material. Constant tool rotation speed of 1800 r/min and travel speed of 127 mm/min were used in this study. The base metal （BM） shows the hypoeutectic Al-Si dendrite structure. The microstructure of the stir zone （SZ） is very different from that of the BM. The eutectic Si and SiC particles are dispersed homogeneously in primary Al solid solution. The thermo-mechanically affected zone （TMAZ）, where the original microstructure is greatly deformed, is characterized by dispersed eutectic Si and SiC particles aligned along the rotational direction of the tool. The hardness of the SZ shows higher value than that of the BM because some defects are remarkably reduced and the eutectic Si and SiC particles are dispersed over the SZ. 展开更多
关键词 friction stir processing A356 alloy SiC powder eutectic Si
暂未订购 下载PDF
Solution-processing approach of nanomaterials toward an artificial sensory system 认领 引用 被引量：6
18
作者 Okin Song Youngwook Cho +1 位作者 Soo-Yeon Cho Joohoon Kang 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2024年第5期1-19,共19页
Artificial sensory systems have emerged as pivotal technologies to bridge the gap between the virtual and real-world,replicating human senses to interact intelligently with external stimuli.To practically apply artifi... Artificial sensory systems have emerged as pivotal technologies to bridge the gap between the virtual and real-world,replicating human senses to interact intelligently with external stimuli.To practically apply artificial sensory systems in the real-world,it is essential to mass-produce nanomaterials with ensured sensitivity and selectivity,purify them for desired functions,and integrate them into large-area sensory devices through assembly techniques.A comprehensive understanding of each process parameter from material processing to device assembly is crucial for achieving a high-performing artificial sensory system.This review provides a technological framework for fabricating high-performance artificial sensory systems,covering material processing to device integrations.We introduce recent approaches for dispersing and purifying various nanomaterials including 0D,1D,and 2D nanomaterials.We then highlight advanced coating and printing techniques of the solution-processed nanomaterials based on representative three methods including(i)evaporation-based assembly,(ii)assisted assembly,and(iii)direct patterning.We explore the application and performances of these solution-processed materials and printing methods in fabricating sensory devices mimicking five human senses including vision,olfaction,gustation,hearing,and tactile perception.Finally,we suggest an outlook for possible future research directions to solve the remaining challenges of the artificial sensory systems such as ambient stability,device consistency,and integration with AI-based software. 展开更多
关键词 artificial sensory system nanomaterials solution-processing printing sensor
暂未订购 下载PDF
Effect of Cr elimination on flow behavior and processing map of newly developed ECO-7175 aluminum alloy during hot compression 认领 引用 被引量：4
19
作者 Majid SEYED-SALEHI Bong Hwan KIM +2 位作者 Seung Yoon YANG Shae Kwang KIM Ghasem EISAABADI BOZCHALOEI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第5期1442-1459,共18页
ECO-Al alloys are introduced as a game-changer for the aluminum industry and it is of utmost importance to determine the role of alloying elements in their processing characteristics.In this study,the effects of Cr on... ECO-Al alloys are introduced as a game-changer for the aluminum industry and it is of utmost importance to determine the role of alloying elements in their processing characteristics.In this study,the effects of Cr on the hot deformation behavior of newly-developed ECO-7175 alloy were investigated.ECO-7175 samples with and without Cr were hot-compressed using a Gleeble simulator(temperature range of 350−500℃ and strain rates of 0.001−1 s−1).The results were used to study the constitutive equations,the processing maps,and the microstructural evolution of the alloys.In Cr-containing alloy,the analysis of the deformation activation energy reveals that the rate-controlling mechanisms of the deformation change gradually from self-diffusion of Al(or diffusion of Mg in Al)to diffusion of Cr in Al by decreasing the Zener−Hollomon parameter.The analysis of the processing maps of Cr-containing alloy shows that the dynamic recrystallization(DRX)zone is limited to the deformation at high temperatures and low strain rates and expands with increasing applied strain.On the other hand,it is found that the self-diffusion of Al(or Mg in Al)is the only rate-controlling mechanism during hot deformation of Cr-free alloy in all processing conditions and its DRX zone is independent of the plastic strain. 展开更多
关键词 hot deformation constitutive equation processing map ECO-7175 aluminum alloy
暂未订购 下载PDF
Electrodeposited copper oxides with a suppressed interfacial amorphous phase using mixed-crystalline ITO and their enhanced photoelectrochemical performances 认领 引用 被引量：1
20
作者 Ji Hoon Choi Hae-Jun Seok +5 位作者 Dongchul Sung Dong Su Kim Hak Hyeon Lee Suklyun Hong Han-Ki Kim Hyung Koun Cho 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第7期277-286,I0007,共10页
The effectiveness of photoelectrochemical(PEC)water splitting is significantly restricted by insufficient light harvesting,rapid charge recombination,and slow water reduction kinetics.Since the presence of amorphous p... The effectiveness of photoelectrochemical(PEC)water splitting is significantly restricted by insufficient light harvesting,rapid charge recombination,and slow water reduction kinetics.Since the presence of amorphous phases in the interfaces hinders the overcome of these inherent limitations,a photoelectrode must be built strategically.Herein,we artificially controlled the crystallographic orientation of indium tin oxide(ITO)to determine the orientation with the smallest lattice mismatch at the Cu2O interface,thus significantly reducing the amorphous phase in the early stage of electrodeposition nucleation.The[222]/[400]mixed orientation ITO primarily exposed the{400}surface planes and accelerated charge transfer by forming an optimal interface with preferentially grown(111)oriented Cu2O and minimized amorphous region.In addition,the ITO surface energy was calculated using density functional theory to theoretically verify which plane is more active for growing the photoactivation layer.The rationally designed ITO/Cu2O/Al-dope Zn O/TiO2/Rh-P device,with each layer serving a specific purpose,achieved a photocurrent density of 8.23 mA cm-2at 0 VRHEunder AM 1.5 G illumination,providing a standard method for effective solar-to-hydrogen conversion photocathodes. 展开更多
关键词 Photoelectrochemical water splitting Cu2O ITO Hydrogen Surface energy DFT
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 3 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈