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Exploring one material for dual applications:A red-emitting Mg2GeO4:Eu3+ nanophosphor for future generation energy efficient WlEDs and dosimetric applications

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Journal of rare Earths 2024年第10期42卷 1835-1845页

作者： Akshay Arjun G.P.Darshan s.C.sharma H.Nagabhushana D.V.sunitha H.B.Premkumar Department of Physics Faculty of Mathematical and Physical SciencesM.S.Ramaiah University of Applied Sciences Jain University C.N.r.rao Centre for advanced Materials Tumkur University school of Applied sciences (Physics) REVA University

The envisaged design and developme nt of individual mate rials to excavate a broader spectrum of desired properties and offer multiple applications are highly *** this in mind,a series of forsterite-structured Mg2GeO4:Eu3+（1 mol%-9 mol%） nanophosphors was synthesized via a solution combustion method using oxalyl dihydrazide as a *** X-ray diffraction patterns confirm the orthorhombic crystal system with a Puma space *** results clearly show irregularly shaped cluster-like structures with aggregation of the *** diffuse reflectance spectra,the optical energy band gap of the Mg2GeO4:Eu3+（1 mol%-9 mol%） nanophosphors was estimated and obtained to be～4.12-4.32 *** photoluminescence emission spectra exhibit intense peaks at ～579,589,610,661,and 707 nm,which are due to characteristic5D0→7F0,5D0→7F1,5Do→7F2,5D0→7F3and5D0→7F4transitions of Eu3+ions,*** Commission International de l'Eclairage color coordinates are gradually tuned from pale red（0.5980,0.4012） to a pure red（0.6385,0.3611） *** glow peaks showcase excellent super-linear response at low doses of γ-irradiations,indicating that the prepared phosphor can be used in thermoluminescent personal dosimetry which is a biological tissue *** aforementioned results demonstrate that the prepared Mg2GeO4:Eu3+（1 mol%-9 mol%） nanophosphors are considered an excellent candidate for dual applications,i.e.,red component in future generation white-light-emitting diodes（WlEDs） and personal dosimetric applications.

关键词： Dosimetry Nanophosphors Photoluminescence Photometric properties rare earths Thermoluminescence

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Efficient guiding and focusing of intense laser pulse using periodic thin slits

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Matter and radiation at Extremes 2024年第4期9卷 29-39页

作者： l.Xu T.W.Huang K.Jiang C.N.Wu H.Peng P.C.hen r.li H.B.Zhuo C.T.Zhou shenzhen Key laboratory of Ultraintense laser and advanced Material Technology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

slits have been widely used in laser-plasma interactions as plasma optical components for generating high-harmonic light and controlling laser-driven particle ***,we propose and demonstrate that periodic thin slits can be regarded as a new breed of optical elements for efficient focusing and guiding of intense laser *** fundamental physics of intense laser interaction with thin slits is studied,and it is revealed that relativistic effects can lead to enhanced laser focusing far beyond the pure diffractive focusing *** addition,the interaction of an intense laser pulse with periodic thin slits makes it feasible to achieve multifold enhancement in both laser intensity and energy transfer efficiency compared with conventional *** results provide a novel method for manipulating ultra-intense laser pulses and should be of interest for many laser-based applications.

关键词： laser pulse intense

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Enhanced reversible hydrogen storage properties of wrinkled graphene microflowers confined liBH_(4) system with high volumetric hydrogen storage capacity

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Materials reports(Energy) 2024年第1期4卷 79-88页

作者： Zhenglong li Kaicheng Xian Hao Chen Mingxia Gao shanqing Qu Meihong Wu Yaxiong Yang Wenping sun Chao Gao Yongfeng liu Xin Zhang Hongge Pan Institute of science and Technology for New Energy Xi'an Technological UniversityXi'an710021PR China state Key laboratory of silicon and advanced semiconductor Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang ProvinceSchool of Materials Science and EngineeringZhejiang UniversityHangzhou310027PR China Department of Polymer science and Engineering MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationZhejiang UniversityHangzhou310027PR China

liBH_(4)with high hydrogen storage density,is regarded as one of the most promising hydrogen storage ***,it suffers from high dehydrogenation temperature and poor reversibility for practical *** is effective in achieving low dehydrogenation temperature and favorable ***,graphene can serve as supporting materials for liBH_(4)catalysts and also destabilize liBH_(4)via interfacial ***,graphene has never been used alone as a frame material for nanoconfining liBH_(4).In this study,graphene microflowers with large pore volumes were prepared and used as nanoconfinement framework material for liBH_(4),and the nanoconfinement effect of graphene was *** loading 70 wt%of liBH_(4) and mechanically compressed at 350 MPa,8.0 wt% of H2 can be released within 100 min at 320C,corresponding to the highest volumetric hydrogen storage density of 94.9 g H2 l^(-1)ever *** to the nanoconfinement of graphene,the rate-limiting step of dehydrogenation of nanoconfined liBH_(4) was changed and its apparent activation energy of the dehydrogenation(107.3 kJ mol^(-1))was 42%lower than that of pure liBH_(4).Moreover,the formation of the intermediate li_(2)B_(12)H_(12) was effectively inhibited,and the stable nanoconfined structure enhanced the reversibility of liBH_(4).This work widens the understanding of graphene's nanoconfinement effect and provides new insights for developing high-density hydrogen storage materials.

关键词： Hydrogen storage liBH_(4) Nanoconfinement Graphene High capacity

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Enhancing crystal integrity and structural rigidity of CsPbBr_(3) nanoplatelets to achieve a narrow colorsaturated blue emission

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light(science & applications) 2024年第5期13卷 985-997页

作者： Qianqian Huang Wenxu Yin Bo Gao Qingsen Zeng Dong Yao Hao Zhang Yinghe Zhao Weijia Zheng Jiaqi Zhang Xuyong Yang Xiaoyu Zhang Andrey l.rogach Key laboratory of Automobile Materials MOE School of Materials Science&Engineeringand Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsJilin UniversityChangchunChina. state Key laboratory of supramolecular structure and Materials College of ChemistryJilin UniversityChangchunChina. state Key laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanHubeiChina. Department of Chemistry University of VictoriaVictoriaBCCanada. Key laboratory of advanced Display and system applications of Ministry of Education Shanghai UniversityShanghaiChina. Department of Materials science and Engineering and Centre for Functional Photonics(CFP)City University of Hong KongHong Kong S.A.RChina

Quantum-confined CsPbBr_(3) perovskites are promising blue emitters for ultra-high-definition displays,but their soft lattice caused by highly ionic nature has a limited ***,we endow CsPbBr_(3) nanoplatelets(NPls)with atomic crystal-like structural rigidity through proper surface engineering,by using strongly bound N-dodecylbenzene sulfonic acid(DBsA).A stable,rigid crystal structure,as well as uniform,orderly-arranged surface of these NPls is achieved by optimizing intermediate reaction stage,by switching from molecular clusters to mono-octahedra,while interaction with DBsA resulted in formation of a Cs_(x)O monolayer shell capping the NPl *** a result,both structural and optical stability of the CsPbBr3 NPls is enhanced by strong covalent bonding of DBsA,which inhibits undesired phase transitions and decomposition of the perovskite phase potentially caused by ligand ***,rather small amount of DBsA ligands at the NPl surface results in a short inter-NPl spacing in their closely-packed films,which facilitates efficient charge injection and *** photoluminescence of the produced CsPbBr_(3) NPls is bright(nearly unity emission quantum yield)and peaks at 457 nm with an extremely narrow bandwidth of 3.7 nm at 80 K,while the bandwidth of the electroluminescence(peaked at 460 nm)also reaches a record-narrow value of 15 nm at room *** value corresponds to the CIE coordinates of(0.141,0.062),which meets rec.2020 standards for ultra-high-definition displays.

关键词： temperature stability narrow

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基于低浓度掺杂TTF-HlCT一体化分子提供的多重激子循环通道增强深蓝光OlED的稳定性

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science China Materials 2024年第7期67卷 2161-2168页

作者：唐振宇龚乐帆郭浩清杨爽罗骏唐荣肖静张震曲波陈志坚肖立新 state Key laboratory of Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China College of Physics and Electronic Engineering Taishan UniversityTaian 271000China Key laboratory of advanced Display and system applications Ministry of EducationShanghai UniversityShanghai 200072China

目前,商用的深蓝有机发光二极管(OlED)使用的三重态-三重态融合(TTF)型发光材料只能捕获50%的三重态(T_(1))激子,导致其器件效率较低.基于窄带蓝色发射体的热激活延迟荧光(TADF)和超荧光策略可以实现接近100%的激子利用率,然而,在发射层... 详细信息

目前,商用的深蓝有机发光二极管(OlED)使用的三重态-三重态融合(TTF)型发光材料只能捕获50%的三重态(T_(1))激子,导致其器件效率较低.基于窄带蓝色发射体的热激活延迟荧光(TADF)和超荧光策略可以实现接近100%的激子利用率,然而,在发射层(EMl)中停留的高能量T_(1)激子通常会导致不可避免的分子降解,从而限制了器件的使用寿命.为了解决这一问题,本文研究了一种TTF-杂化局域-电荷转移态(HlCT)一体化分子,旨在通过多个激子回收通道降低EMl内T_(1)激子的密度,从而提高高效深蓝OlED的稳定性.通过TTF过程回收T_(1)激子,通过HlCT过程利用高能三重态(Tn)激子,可以提高EMl中三重态激子的利用率.此外,低浓度掺杂的TTF-HlCT分子在TADF体系中可以减轻T_(1)激子猝灭造成的效率损失.最后,实现了外量子效率(EQE)为25.9%、CIE为(0.131,0.050)、蓝光指数(CE由CIEy校准)为312 cd A^(−1) CIE_(y)^(−1)的顶发射OlED,并且其寿命T90@1000 cd m^(−2)从0.5小时延长到6.1小时.本工作揭示了低浓度TTF-HlCT分子掺杂的潜力,作为一种可行的解决方案,可以最大限度地减少效率猝灭,并解决蓝光OlED的稳定性问题.

关键词： organic light-emitting diode stability multiple ex-citon recycling channels deep blue emission TTF-HlCT

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Design Principles and Mechanistic Understandings of Non-Noble-Metal Bifunctional Electrocatalysts for Zinc-Air Batteries

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Nano-Micro letters 2024年第9期16卷 13-48页

作者： Yunnan Gao ling liu Yi Jiang Dexin Yu Xiaomei Zheng Jiayi Wang Jingwei liu Dan luo Yongguang Zhang Zhenjia shi Xin Wang Ya‑Ping Deng Zhongwei Chen Power Battery and systems research Center State Key Laboratory of CatalysisDalian Institute of Chemical PhysicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023People’s Republic of China Department of Chemical Engineering University of WaterlooWaterlooON N2L 3G1Canada Institute of Carbon Neutrality Zhejiang Wanli UniversityNingbo 315100People’s Republic of China College of Materials and Chemistry China Jiliang UniversityHangzhou 310018People’s Republic of China

Zinc-air batteries(ZABs)are promising energy storage systems because of high theoretical energy density,safety,low cost,and abundance of ***,the slow multi-step reaction of oxygen and heavy reliance on noble-metal catalysts hinder the practical applications of ***,feasible and advanced non-noble-metal elec-trocatalysts for air cathodes need to be identified to promote the oxygen catalytic *** this review,we initially introduced the advancement of ZABs in the past two decades and provided an overview of key developments in this ***,we discussed the work-ing mechanism and the design of bifunctional electrocatalysts from the perspective of morphology design,crystal structure tuning,interface strategy,and atomic *** also included theoretical studies,machine learning,and advanced characterization technologies to provide a comprehensive understanding of the structure-performance relationship of electrocatalysts and the reaction pathways of the oxygen redox ***,we discussed the challenges and prospects.r.l.ted to designing advanced non-noble-metal bifunctional electrocatalysts for ZABs.

关键词： Zinc-air batteries Bifunctional electrocatalysts Design principles Mechanistic understandings

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A system-on-chip microwave photonic processor solves dynamic rF interference in real time with picosecond latency

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light(science & applications) 2024年第1期13卷 91-102页

作者： Weipeng Zhang Joshua C.lederman Thomas Ferreira de lima Jiawei Zhang simon Bilodeau leila Hudson Alexander Tait Bhavin J.shastri Paul r.Prucnal Department of Electrical and Computer Engineering Princeton UniversityPrinceton08544NJUSA NEC laboratories America Princeton08540NJUSA Department of Electrical and Computer Engineering Queen’s UniversityKingstonK7L 3N6OntarioCanada Department of Physics Engineering Physics and AstronomyQueen’s UniversityKingstonK7L 3N6OntarioCanada

radio-frequency interference is a growing concern as wireless technology advances,with potentially life-threatening consequences like interference between radar altimeters and 5 G cellular *** transceivers mix signals with varying ratios over time,posing challenges for conventional digital signal processing(DsP)due to its high *** challenges will worsen as future wireless technologies adopt higher carrier frequencies and data ***,conventional DsPs,already on the brink of their clock frequency limit,are expected to offer only marginal speed *** paper introduces a photonic processor to address dynamic interference through blind source separation(Bss).Our system-on-chip processor employs a fully integrated photonic signal pathway in the analogue domain,enabling rapid demixing of received mixtures and recovering the signal-of-interest in under 15 *** reduction in latency surpasses electronic counterparts by more than three orders of *** complement the photonic processor,electronic peripherals based on field-programmable gate array(FPGA)assess the effectiveness of demixing and continuously update demixing weights at a rate of up to 305 *** compact setup features precise dithering weight control,impedance-controlled circuit board and optical fibre packaging,suitable for handheld and mobile *** experimentally demonstrate the processor’s ability to suppress transmission errors and maintain signal-to-noise ratios in two scenarios,radar altimeters and mobile *** work pioneers the real-time adaptability of integrated silicon photonics,enabling online learning and weight adjustments,and showcasing practical operational applications for photonic processing.

关键词： processor mixing dynamic

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Macroporous Directed and Interconnected Carbon Architectures Endow Amorphous silicon Nanodots as low‑strain and Fast‑Charging Anode for lithium‑Ion Batteries

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Nano-Micro letters 2024年第5期16卷 333-351页

作者： Zhenwei li Meisheng Han Peilun Yu Junsheng lin Jie Yu Guangdong Provincial Key laboratory of semiconductor Optoelectronic Materials and Intelligent Photonic systems Shenzhen Engineering Lab for Supercapacitor MaterialsSchool of Material Science and EngineeringHarbin Institute of TechnologyShenzhenUniversity TownShenzhen 518055People’s Republic of China songshan lake Materials laboratory Dongguan Dongguan 523808GuangdongPeople’s Republic of China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China

Fabricating low-strain and fast-charging silicon-carbon composite anodes is highly desired but remains a huge challenge for lithium-ion ***,we report a unique silicon-carbon composite fabricated by uniformly dis-persing amorphous si nanodots(siNDs)in carbon nanospheres(siNDs/C)that are welded on the wall of the macroporous carbon framework(MPCF)by vertical graphene(VG),labeled as MPCF@VG@siNDs/*** high dispersity and amor-phous features of ultrasmall siNDs(~0.7 nm),the flexible and directed electron/li+transport channels of VG,and the MPCF impart the MPCF@VG@siNDs/C more lithium storage sites,rapid li+transport path,and unique low-strain property during li+***,the MPCF@VG@siNDs/C exhibits high cycle stability(1301.4 mAh g^(-1) at 1 A g^(-1) after 1000 cycles without apparent decay)and high rate capacity(910.3 mAh g^(-1),20 A g^(-1))in half cells based on industrial electrode *** assembled pouch full cell delivers a high energy density(1694.0 Wh l^(-1);602.8 Wh kg^(-1))and an excellent fast-charging capability(498.5 Wh kg^(-1),charging for 16.8 min at 3 C).This study opens new possibilities for preparing advanced silicon-carbon com-posite anodes for practical applications.

关键词： Amorphous si nanodots low-strain Fast-charging lithium-ion batteries

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Parallelization of frequency domain quantum gates:manipulation and distribution of frequency-entangled photon pairs generated by a 21 GHz silicon microresonator

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advanced Photonics 2024年第3期6卷 60-69页

作者： Antoine Henry Dario A.Fioretto lorenzo M.Procopio stéphane Monfray Frédéric Boeuf laurent Vivien Eric Cassan Carlos Alonzo-ramos Kamel Bencheikh Isabelle Zaquine Nadia Belabas Institut Polytechnique de Paris LTCITélécom ParisPalaiseauFrance Université Paris-saclay CNRSCentre for Nanosciences and NanotechnologyUMR 9001PalaiseauFrance Weizmann Institute of science RehovotIsrael sTMicroelectronics sAs CrollesFrance

Harnessing the frequency dimension in integrated photonics offers key advantages in terms of scalability,noise resilience,parallelization,and compatibility with telecom multiplexing *** ring resonators have been used to generate frequency-entangled states through spontaneous four-wave ***,state-of-the-art integrated resonators are limited by trade-offs among size,spectral separation,and efficient photon pair *** have developed silicon ring resonators with a footprint below 0.05 mm^(2)providing more than 70 frequency channels separated by 21 *** exploit the narrow frequency separation to parallelize and independently control 34 single qubit-gates with a single set of three off-the-shelf electro-optic *** fully characterize 17 frequency-bin maximally entangled qubit pairs by performing quantum state *** demonstrate for the first time,we believe,a fully connected five-user quantum network in the frequency *** results are a step towards a generation of quantum circuits implemented with scalable silicon photonics technology,for applications in quantum computing and secure communications.

关键词： integrated photonics frequency domain quantum gates quantum networks

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Mutiparametric Characterization of Atmospheric Particulate in a Heavy-Polluted Area of south Italy

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Atmospheric and Climate sciences 2022年第2期12卷 493-516页

作者： Carmen De Marco Antonella Boselli Andrea D’Anna Alessia sannino Gaetano sasso Mariano sirignano Nicola spinelli Xuan Wang ala advanced lidar applications s.r.l. Napoli Italy Istituto di Metodologie per l’Analisi Ambientale (IMAA) Consiglio Nazionale delle Ricerche Potenza Italy Centro di servizi Metrologici Avanzati (CesMA) Napoli Italy Dipartimento di Ingegneria Chimica Materiali e Produzione Industriale (DICMAPI) Università degli Studi di Napoli Federico II Napoli Italy Dipartimento di Fisica “E. Pancini” Università degli Studi di Napoli Federico II Napoli Italy Istituto superconduttori Materiali Innovativi e Dispositivi (SPIN) Consiglio Nazionale delle Ricerche Napoli Italy

To obtain a real-time image of atmospheric particulate matter (PM) in highly polluted areas and to understand how the anthropogenic component linked to urban activities (industrial activities, domestic heating, road traffic, waste disposal) can locally affect near-surface measurement of PM, several measurement campaigns were achieved in the Campania region (southern Italy) using both lidar and in-situ instruments. A comparison between the obtained results highlights a good correlation between the data and the potential of remote sensing instruments for air quality monitoring. Data analysis was performed in terms of particle backscattering coefficient profile at 355 nm, PM mass concentration, and size distribution. Wind profiles, which covered a range of altitudes from 40 m to 290 m, were also used to study sources and physical processes involved. Measurement carried out in a rural area with a landfill site highlighted the presence of a homogeneous particulate layer throughout the sounded area due to winds driving aerosol from the landfill to the surrounding areas. The size distribution in mass concentration, highlighted a modal diameter moving towards 0.9 and 2 μm with a larger mass concentration of particles in the morning, before noon and in the afternoon when a large number of trucks delivered solid wastes. Moreover, large concentrations of particulate matter were measured in a small urban town with few industrial activities which peak (211 ± 33 μg·msup>-sup>sup>3sup>) was measured in the direction of the most urbanized area, probably due to the lighting of the domestic heating systems. Bimodal size distribution in number concentration was measured, indicative of two types of atmospheric particles sources: gas and liquid combustion (particles with sizes below 80 nm), including vehicular traffic and domestic gas-heating, and biomass combustion (particles with sizes of the order of 200 - 500 nm). Finally, data collected in a highly populated and industri

关键词： PM Particle size Distribution Optical Particles Properties remote sensing

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