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A guide to use fluorinated aromatic bulky cations for stable and high-performance 2D/3D perovskite solar cells:The more fluorination the better?

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Journal of Energy Chemistry 2022年第1期31卷 179-189,I0006页

作者： Lei Wang Qin Zhou Zilong Zhang Wenbo Li Xiaobing Wang Qi ng Tian Xiaoyan Yu Ting Sun Jihuai Wu Bao Zhang Peng Gao School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002FujianChina Laboratory for Advanced Functional Materials.Xiamen Institute of Rare Earth Materials Haixi InstituteChinese Academy of SciencesXiamen 361021FujianChina College of Materials Science and Engineering Huaqiao University361021 XiamenFujianChina

While serious stability issues impede the commercialization of perovskite solar cells(PSCs),two-dime nsional(2D)perovskites based on fluorinated bulky cations have emerged as more intrinsically stable ***,the influence of fluorination degree of the bulky aromatic cation on the per-formance of resulting PSCs has not been ***,2D perovskites(FxPEA)_(2)PbI_(4)(x=1,2,3,5)are grown in situ on the surface of the three-dime nsion al(3D)perovskite and dem on strate effective passivation of the surface defects of 3D *** power conversion efficiency(PCE)of the optimized devices were boosted from 20.75%for the control device to 21.09%,22.06%,22.74%and 21.86%for 2D/3D devices treated with 4-fluorophenethylamine iodide,3,5-difluorophenylethylamine iodide,2,4,5-trifluoroethylphenylethylamine iodide,and 1,2,3,4,5-pentafluorophenylethylamine iodide,*** firstly reported two unexplored RP-type layered perovskites with F_(2)PEAI and F_(3)PEAI as bulky *** combined experimental and theoretical analysis revealed the reasons behind the various morphology,device performances,dynamic behavior,and humidity *** best performing F_(5)PEAI-treated device retaining 95.0%of its initial PCE under ambient atmosphere(with RH of 60%±5%)without encapsulation for 300 h *** work provides useful guidance for selecting fluorinated bulky cations with different molecular electronic properties,which will play an essential role in further improving the performance/stability of PSCs for the sake of further commercialization.

关键词： 2D perovskite Fluorinated spacer cation Perovskite solar cells Passivation Stability

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发射峰为875 nm的高热稳定性立方相Sc(PO_(3))_(3):Cr^(3+)荧光粉

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Science China Materials 2024年第3期67卷 931-938页

作者：刘乐聂文东吴会杰张景荣梁思思朱浩淼 CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Research Center of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen 361021China

近红外(NIR)荧光粉转换型发光二极管(pc-LED)具有尺寸小、效率高以及光谱易于调节的特点,在特种照明、传感、微型近红外光谱仪等各领域有很好的应用前景.目前,已报道的发射波长超过850 nm的近红外荧光粉的荧光热稳定性较差.在本项研究中... 详细信息

近红外(NIR)荧光粉转换型发光二极管(pc-LED)具有尺寸小、效率高以及光谱易于调节的特点,在特种照明、传感、微型近红外光谱仪等各领域有很好的应用前景.目前,已报道的发射波长超过850 nm的近红外荧光粉的荧光热稳定性较差.在本项研究中,我们合成了一种立方相结构的Sc(PO_(3))_(3):xCr^(3+)(x=0,1,5,10,12,14,16,18 at%)荧光粉,其具有725–1150 nm的宽发射带,发射峰为875 nm,与之前报道的发射峰超过850 nm的荧光粉相比,其表现出优异的热稳定性,在423 K下,5 at%样品的积分发光强度保留了室温下的73.4%.通过对比研究立方相和单斜相Sc(PO_(3))_(3):Cr^(3+)荧光粉变温X射线衍射,发现立方相荧光粉优异的荧光热稳定性可能归因于高温下较小的键长和键角变化.利用该荧光粉制备的NIR pc-LED在150 mA电流驱动下,产生了26.62 mW的NIR辐射功率.驱动电流为10 mA时,最高电光转换效率为11.87%.这项工作为开发具有优异荧光热稳定性的Cr^(3+)离子掺杂近红外荧光粉提供了思路.

关键词： near infrared phosphor pc-LEDs broadband emission Sc(PO_(3))_(3) luminescent materials

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Anion Defects Engineering of Ternary Nb-Based Chalcogenide Anodes Toward High-Performance Sodium-Based Dual-Ion Batteries

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Nano-Micro Letters 2023年第7期15卷 218-232页

作者： Yangjie Liu Min Qiu Xiang Hu Jun Yuan Weilu Liao Liangmei Sheng Yuhua Chen Yongmin Wu Hongbing Zhan Zhenhai Wen College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108People’s Republic of China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Materials and Techniques Toward Hydrogen EnergyFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002People’s Republic of China Fujian Normal University Fuzhou 350108People’s Republic of China State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power Sources2965 Dongchuan RoadShanghai 200245People’s Republic of China

Sodium-based dual-ion batteries(SDIBs) have gained tremendous attention due to their virtues of high operating voltage and low cost, yet it remains a tough challenge for the development of ideal anode material of SDIBs featuring with high kinetics and long durability. Herein, we report the design and fabrication of N-doped carbon film-modified niobium sulfur–selenium(NbSSe/NC) nanosheets architecture, which holds favorable merits for Na^(+) storage of enlarged interlayer space, improved electrical conductivity, as well as enhanced reaction reversibility, endowing it with high capacity, high-rate capability and high cycling stability. The combined electrochemical studies with density functional theory calculation reveal that the enriched defects in such nanosheets architecture can benefit for facilitating charge transfer and Na+ adsorption to speed the electrochemical kinetics. The NbSSe/NC composites are studied as the anode of a full SDIBs by pairing the expanded graphite as cathode, which shows an impressively cyclic durability with negligible capacity attenuation over 1000 cycles at 0.5 A g^(-1), as well as an outstanding energy density of 230.6 Wh kg^(-1) based on the total mass of anode and cathode.

关键词： NbSSe Sodium-based dual-ion battery Anode Nanosheets architecture Anion defects engineering

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Novel Sc-doped Bi_(3)TiNbO_(9) ferroelectric nanofibers prepared by electrospinning for visible-light photocatalysis

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Journal of Rare Earths 2023年第3期41卷 365-373,I0002页

作者： Zhixiong Song Shuwen Yu Kaixian Wang Zhengming Jiang Liyan Xue Fan Yang Fujian Institute of Research on the Structure of Matter Chinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350002China Xiamen Institute of Rare Earth Materials Haixi InstituteChinese Academy of SciencesXiamen 361021China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Chinese Academy of SciencesXiamen 361021China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341001China

In this work,a novel Sc-doped Bi_(3)TiNbO_(9) ferroelectric nanofiber was first prepared by *** nanofibers are approximately 100 nm level in *** photocatalytic activity analysis reveals that the Bi_(3)TiNbO_(9) nanofibers synthesized by electrospinning are superior to powders prepared by the solid-state method,which is mainly attributed to the high specific surface area and high surface activity of the *** addition,doping Sc can reduce the band gap of Bi_(3)TiNbO_(9) and further improve the photocatalytic ***_(3)TiNbO_(9) nanofibers containing 5 mol%Sc have the highest photocatalytic activity,which can degrade 98.55%of RhB under 405 nm light irradiation for 120 *** addition,the catalytic mechanism of the catalyst was obtained by scavenger tests,active species capture tests and band structure *** three cycles of photocatalytic experiment,the degradation rate is decreased by only 2.42%,proving that the nanofibers catalyst has excellent *** work provides good prospects for the practical application of electrospinning technology in the field of photocatalysis.

关键词： Nanofibers Ferroelectric Scandium Visible-light photocatalysis Rare earths

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Monodispersed SWNTs Assembled Coating Layer as an Alternative to Graphene with Enhanced Alkali-ion Storage Performance

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Chinese Journal of Structural Chemistry 2022年第1期41卷 40-46页

作者： Chaoying Wang Qianqian Yao Yanmei Gan Qixin Zhang Lunhui Guan Yi Zhao College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China Straits Institute of Flexible Electronics(SIFE Future Technologies)Fujian Normal UniversityFuzhou 350117China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350108China

Graphene coating is commonly used to improve the performance of electrode materials,while its steric hindrance effect hampers fast ion transport with compromised rate ***,a unique single-walled carbon nanotubes(SWNTs)coating layer,as an alternative to graphene,has been developed to improve the battery behavior of iron-based *** from the structure merits of mesoporous SWNTs layer for fast electron/ion transport and hollow Fe_(3)O_(4) for volume accommodation,as-prepared Fe_(3)O_(4)@SWNTs exhibited excellent lithium storage *** delivers a high capacity,excellent rate capability,and long lifespan with capacities of 582 mA·h·g^(-1) at 5 A·g^(-1) and 408 mA·h·g^(-1) at 8 A·g^(-1) remained after 1000 *** performance is better than graphene-coated Fe_(3)O_(4) and other SWNT-Fe_(3)O_(4) ***,SWNTs coating is also used to improve the sodium and potassium storage performance of FeSe_(2).The kinetics analysis and ex-situ experiment further reveal the effect of SWNTs coating for fast electron/ion transfer kinetics and good structure stability,thus leading to the superior performance of SWNTs-coated composites.

关键词： single-walled carbon nanotubes graphene Fe_(3)O_(4) FeSe_(2) alkali-ion batteries

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Transparent Co_(3)FeO_(x) Film Passivated BiVO_(4) Photoanode for Efficient Photoelectrochemical Water Splitting

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Chinese Journal of Structural Chemistry 2021年第11期40卷 1505-1512,1409页

作者： FANG Ming QIN Qi CAI Qian LIU Wei Fujian Normal University Fuzhou 350007China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of NanomaterialFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Photoelectrochemistry that use semiconductors to absorb sunlight for water splitting provides an effective method for the development of renewable hydrogen energy in the *** this paper,a transparent and highly-efficient cobalt-iron oxide(Co_(3)FeO_(x))nano-film was fabricated through hydrothermal method by directional adjustment of atomic ratio to promote the kinetics of BiVO_(4)(BVO)photoanode water *** a result,the Co_(3)FeO_(x)-modified BVO photoanode(Co_(3)FeO_(x)/BVO)exhibits an impressive photocurrent density of 4.0 mA·cm^(2) at 1.23 V versus reversible hydrogen electrode(RHE),approximately 2.17-fold higher than that of bare BVO,as well as a cathodically shifted onset potential of 320 *** catalyst nanolayer structure is clarified by ultraviolet-visible *** addition,the Co_(3)FeO_(x)/BVO photoanode has better stability,and there is no obvious activity degradation after 10 hours of *** strategy provides a broad prospect for the use of water oxidation co-catalyst to achieve effective water splitting.

关键词： photoelectrochemical water splitting bismuth vanadate co-catalyst cobalt-iron oxide

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Antibiotic Silver Particles Coated Graphene Oxide/polyurethane Nanocomposites Foams and Its Mechanical Properties

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Chinese Journal of Structural Chemistry 2022年第3期41卷 125-131,I0010页

作者： YANG Zhi LI Kun-Rong ZHANG Yuan-Ye HU Jia-Le LI Tian-Yuan WENG Zi-Xiang WU Li-Xin College of Chemistry Fuzhou UniversityFuzhou 350108China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Key Lab for Sport Shoes Upper Materials of Fujian Province Fujian Huafeng New Material Co.Ltd.Putian 351164China

Silver nanoparticles(AgNPs)are widely adopted in polyurethane foams(PUFs)as a type of antibac-terial ***,due to its poor interfacial interaction,AgNPs are difficult to be dispersed in the polymer matrix uniformly,which deteriorates the enhancement *** this paper,silver-coated graphene nanocomposite(Ag/GO)is prepared by an enzyme reductant which is efficient and *** with traditional antibacterial agent,the Ag/GO nanoparticles can be uniformly dispersed in the nanocomposite,which means that Ag/GO can be well-dispersed into the polyurethane foams(PUFs).Compared with AgNPs modified PUFs,the as-prepared Ag/GO modi-fied PUFs have a 1.85%improvement in resilience,7.9%improvement in tensile strength,6.52%improvement in tensile elongation,and 8.74%improvement in bacteriostats rate at a loading of 0.4%.

关键词： graphene nanocomposite polyurethane foams antibacterials

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Bifunctional Mn-doped CoSe_(2) nanonetworks electrode for hybrid alkali/acid electrolytic H_(2) generation and glycerol upgrading

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Journal of Energy Chemistry 2022年第9期31卷 424-431,I0012页

作者： Linfeng Fan Yaxin Ji Genxiang Wang Zhifang Zhang Luocai Yi Kai Chen Xi Liu Zhenhai Wen CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002FujianChina School of Chemistry and Chemical Engineering Yulin UniversityYulin 719000ShaanxiChina University of Chinese Academy of Science Beijing 100049China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007FujianChina

Electrolytic water splitting,as a promising route to hydrogen(H_(2))production,is still confronted with the sluggish anodic oxygen evolution reaction(OER)and its less value-added O2 ***,we report a bifunctional electrode fabricated by in situ growth of Mn-doped CoSe_(2)nanonetworks on carbon fiber cloth(Mn-CoSe_(2)/CFC),which shows attractive electrocatalytic properties toward glycerol oxidation reaction(GOR)in alkali and hydrogen evolution reaction(HER)in acid.A flow alkali/acid hybrid electrolytic cell(fA/A-hEC)was then developed by coupling anodic GOR with cathodic HER with the Mn-CoSe_(2)/CFC bifunctional *** fA/A-hEC enables a rather low voltage of 0.54 V to achieve 10 mA cm^(-2),and maintain long-term electrolysis stability over 300-h operation at 100 mA cm^(-2)with Faraday efficiencies of over 99%for H_(2)and 90%for formate *** designed bifunctional electrode in such innovative fA/A-hEC device provides insightful guidance for coupling energy-efficient hydrogen production with biomass upgradation.

关键词： Mn-doped CoSe_(2)nanonetworks Glycerol upgrading electrooxidation Hydrogen production Bifunctional electrocatalytic electrode Hybrid flow alkali/acid electrolyzer

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用于水和二氧化碳电解的高熵纳米结构电催化剂

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Science China Materials 2024年第6期67卷 1791-1803页

作者：王根香陈俊翔温珍海李景虹 CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Materials and Techniques toward Hydrogen EnergyFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology Tsinghua UniversityBeijing 100084China School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013China

电催化剂在加速电化学转换中扮演着关键角色,这种转换可以利用日益增长的可再生能源将广泛存在的分子转化为高价值化学品.高熵材料(HEMs),通常为含有至少五种主要元素的固溶体,因其独特的物理化学特性,在电催化领域展现出广阔的应用潜力... 详细信息

电催化剂在加速电化学转换中扮演着关键角色,这种转换可以利用日益增长的可再生能源将广泛存在的分子转化为高价值化学品.高熵材料(HEMs),通常为含有至少五种主要元素的固溶体,因其独特的物理化学特性,在电催化领域展现出广阔的应用潜力.尽管对HEMs的研究兴趣持续增长,但开发适合实际应用的高效HEMs电催化剂及理解其催化机理仍是挑战所在.本论文聚焦分析HEM纳米催化剂在几种关键电化学反应中的前沿应用,首先回顾了常见的HEMs电催化剂制备技术,继而探讨了关于高熵合金在电催化中的理论计算研究,以深化对其电催化应用的理解.此外,文章还概述了HEMs电催化剂在水和二氧化碳电解的关键反应中的应用前景,包括析氢反应、二氧化碳还原反应、析氧反应及其它小分子的氧化反应.通过分析近期的重要成果,本文重点讨论了HEMs电催化剂的结构与电催化性能之间的关系.最后,文章展望了高熵纳米材料在电催化实际应用中面临的关键挑战与未来的机遇.我们期望本论文能够激发更多关于开发和完善HEMs纳米结构电催化剂的研究,探索其可行且可扩展的制备方法,促进其在电催化领域的广泛应用.

关键词：电催化析氢反应二氧化碳还原催化机理电化学反应可再生能源纳米结构析氧反应

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Harnessing d-f transition rare earth complexes for single layer white organic light emitting diodes

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Chinese Journal of Structural Chemistry 2024年第9期43卷 10-12页

作者： Yanrui Liu Paramaguru Ganesan Peng Gao CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002PR China Department of Chemistry Fujian Normal UniversityFuzhou350007PR China Laboratory of Advanced Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen361021PR China Fujian College University of Chinese Academy of SciencesFuzhou350002PR China University of Chinese Academy of Sciences Beijing100049PR China

Luminescent rare earth complexes,known for their f-f transition resulting in narrower emission characteristics with full width half maximum(FWHM)lying around~10 nm,are potential candidates for display applications[1].However,the long excited state lifetime and poor thermal stability of lanthanide complexes have limited their exploration compared to phosphorescent *** to open-shell d-f-transition,such as with europium(Eu^(2+))complexes,offers advantages like short lifetime and unitary exciton utilization efficiency,along with tunable emission colors through ligand field variations.

关键词： complexes rare transition

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