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Synthesis,structure,and luminescence properties of melilite Dy^(3+):Lu_(x)CaLa_(0.98-x)Ga_(3)O_(7) phosphors for use in yellow light-emitting devices

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Journal of Rare Earths 2024年第8期42卷 1489-1495,I0003页

作者： Yunyun Liu Chuanxin Huang Meng Wang Xihu Wang Yan Wang Ju Gao School of Opto-Electronic Engineering Zaozhuang UniversityZaozhuang277160China Key Laboratory of Functional Materials and Devices for Informatics of Anhui Educational Institutions Department of PhysicsFuyang Normal UniversityFuyang236037China Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002.China

Dy^(3+) and Lu^(3+) co-doped CaLaGa_(3)O_(7) phosphors were prepared via high-temperature solid-phase *** electronic structures of LuxCaLa_(0.98-x)Ga_(3)O_(7) were investigated by the first-principles *** influence of Lu^(3+) on yellow light emission was studied using X-ray diffraction(XRD)and photoluminescence(PL) *** XRD results indicate that compared to Dy^(3+):CaLaGa_(3)O_(7),the cell parameters of Dy^(3+):LuCaLaGa_(3)O_(7) tend to decrease,which is due to the smaller radius of Lu^(3+).When pumped by blue GaN laser diode(LD),the emission peaks of phosphors with different Lu^(3+)doping concentrations in the visible region are similar,with the strongest peak at 574 nm in the yellow light region,which is sensitive to human *** optimal doping concentration of Lu^(3+) is confirmed to be1 at%,when all emission spectra and measured fluorescence lifetimes are taken into ***,the optimal phosphor composition Dy^(3+):Lu_(x)CaLa_(0.98-x)Ga_(3)O_(7)(x=0.01) has an internal quantum efficiency(IQE) of 46.94% and an external quantum efficiency(EQE) of 15.19%.Most notably,the prepared phosphor demonstrates excellent thermal stability and a high activation energy(0.203 eV).In addition,the International Illumination Commission color coordinates of the Dy^(3+):LuxCaLa_(0.98-x)Ga_(3)O_(7) phosphors are in the yellow light *** above analysis indicates that the Dy^(3+):LuxCaLa_(0.98-x)Ga_(3)O_(7)(x=0.001)phosphor has promising application prospects in yellow light-emitting devices.

关键词： Dy^(3+):Lu_(x)CaLa_(0.98-x)Ga_(3)O_(7)phosphors Yellow emission structure characteristics Luminescent properties Rare earths

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Mn^(2+)离子掺杂制备的高效红光发射无铅铯钪卤化物钙钛矿晶体

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Science China Materials 2024年第4期67卷 1340-1347页

作者：曹梦妍李仁富李智霖赵修建龚晓 State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China fujian institute of research on the structure of matter Chinese Academy of SciencesFuzhou 350002China

通过简便的湿化学方法,将Mn^(2+)离子掺杂到Cs_(2)ScCl_(5)·H_(2)O钙钛矿中,可以快速合成具有高光致发光量子产率的钙钛矿晶体.在红光区掺杂Mn^(2+)的钙钛矿晶体的量子产率比主体材料高出12倍以上,比CsMnCl_(3)·2H_(2)O高出近24倍.此... 详细信息

通过简便的湿化学方法,将Mn^(2+)离子掺杂到Cs_(2)ScCl_(5)·H_(2)O钙钛矿中,可以快速合成具有高光致发光量子产率的钙钛矿晶体.在红光区掺杂Mn^(2+)的钙钛矿晶体的量子产率比主体材料高出12倍以上,比CsMnCl_(3)·2H_(2)O高出近24倍.此外,利用密度泛函理论计算研究了材料的轨道杂化性质,进一步研究了材料的光学性质.Mn^(2+)掺杂后,被Sc八面体分离的Mn八面体可以更有效地限制激子,有利于提高量子产率.与原来的带隙相反,出现了归属于Mn和宿主元素的新杂化轨道.掺杂样品的吸收和激发范围从深紫外吸收扩展到紫外和可见吸收.基于上述性质,利用掺杂Mn^(2+)的钙钛矿制备了蓝芯片激发的高效白色发光二极管,其显色指数高达91,为未来在光电子领域的应用开辟了道路.

关键词：量子产率杂化轨道密度泛函理论计算光电子领域显色指数八面体白色发光二极管湿化学方法

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Tandem catalysis of Cu/Ni multi-sites promotes oxygen reduction reaction

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Science China Materials 2024年第9期67卷 2934-2940页

作者： Bin-Bin Feng Ke-Ke Chang Wan-Feng Xiong Duan-Hui Si Shui-Ying Gao Hong-Fang Li Rong Cao College of Chemistry and Materials Science Fujian Normal UniversityFuzhou350007China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China University of chinese academy of sciences Beijing100049China

The special electronic characteristics and high atom usage efficiency of metal-nitrogen-carbon(M-N-C)materials have made them extremely attractive for oxygen reduction reactions(ORRs).However,it is inevitable that hydrogen peroxide(H_(2)O_(2))will be formed via the two-electron pathway in ***,the Cu nanoparticles(NPs)have been encapsulated into Ni doped hollow mesoporous carbon spheres(Ni-HMCS)to reduce the generation of H_(2)O_(2)in *** tests confirm that the introduction of Cu NPs improves the ORR performance *** obtained Cu/Ni-HMCS exhibits a half-wave potential of 0.82 V *** hydrogen electrode and a limited current density of 5.5 mA cm^(-2),which is comparable with the commercial Pt/***,Cu/Ni-HMCS has been used in Zn-air battery,demonstrating a high power density of 161 mW cm^(-2)and a long-term recharge capability(50 h at 5 mA cm^(-2)).The theoretical calculation proposes a tandem catalysis pathway for Cu/Ni multi-sites catalysis,that is,H_(2)O_(2)released from the Ni-N_(4)and Cu-N_(4)sites migrates to the Cu(111)face,on which the captive H_(2)O_(2)is further reduced to H_(2)*** work demonstrates an interesting tandem catalytic pathway of dual-metal multi-sites for ORR,which provides an insight into the development of effective fuel cell electrocatalysts.

关键词： oxygen reduction reaction tandem catalysis pathway dual-metal multi-sites Cu nanoparticles

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Folding encapsulation toward Lindqvist polyoxometalates within adaptive coordination cages for catalysis

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Science China Chemistry 2024年

作者： Ying-Mei Zhong Jin-Jin Xuan Xu-Jie Qin Han Xiao Zi-Jun Xia Li-Peng Zhou Xiao-Qing Guo Yu-Hang Hu Lu Zhang Chun-Sen Li Li-Xuan Cai Qing-Fu Sun State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences College of Chemistry and Materials Science Fujian Normal University University of chinese academy of sciences

In nature,enzymes at specific folded conformations exhibit high substrate complementarity,enabling them to efficiently and selectively catalyze biochemical *** by enzymes,coordination cages with conformational dynamics have been designed and are receiving increasing attention due to their versatile applications in allosteric guest binding and *** present here two enzyme-mimicking adaptive macrocycle-based coordination cages,Pd2L12and Pd2L22,from macrocycle-based ligands（L1and L2） and the encapsulation and stabilization of Lindqvist polyoxometalates anions M6O192-（M=W or Mo） in neutral aqueous solution.X-ray crystallographic studies have verified the formation of 1:1 host-guest complexes of two Pd2 L2 cages and the W6O192-anion,via an induced-fit folding *** with the free host,Pd2L12exhibited an induced-fit semi-folded conformation in the inclusion complex,while Pd2L22adopted an induced-fit fully-folded ***,the Mo6O19?Pd2L2host-guest complexes demonstrate high yield and selectivity in the oxidative decontamination reaction of the sulfur mustard simulant,2-chloroethyl ethyl *** work not only sheds light on the importance of conformational adaptability in enzyme-like systems but also paves the way for protecting labile POM clusters via host-guest encapsulation toward enhanced catalytic performance in aqueous solution.

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White light emission in 0D halide perovskite[(CH_(3))_(3)S]_(2)SnCl_(6)·H_(2)O crystals through variation of doping ns^(2) ions

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Frontiers of Optoelectronics 2024年第1期17卷 57-66页

作者： Yitong Lin Yu Zhong Yangpeng Lin Jiawei Lin Lei Pang Zhilong Zhang Yi Zhao Xiao‑Ying Huang Ke‑Zhao Du fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering Collage of Chemistry and Material ScienceFujian Normal UniversityFuzhou 350007China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Qinghai Environmental Monitoring Center Xining 810000China Strait institute of Flexible Electronics(SIFE Future Technologies)Fujian Normal University and Strait Laboratory of Flexible Electronics(SLoFE)Fuzhou 350007China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

With the rapid development of white LEDs,the research of new and efficient white light emitting materials has attracted increasing *** dimensional(0D)organic–inorganic hybrid metal halide perovskites with superior luminescent property are promising candidates for LED application,due to their abundant and tailorable ***,[(CH_(3))_(3)S]_(2)SnCl_(6)・H_(2)O is synthesized as a host for dopant ions Bi^(3+)and Sb^(3+).The Sb^(3+)doped,or Bi^(3+)/Sb^(3+)co-doped,[(CH_(3))3S]_(2)SnCl_(6)・H_(2)O has a tunable optical emission spectrum by means of varying dopant ratio and excitation *** a result,we can achieve single-phase materials suitable for emission ranging from cold white light to warm white *** intrinsic mechanism is examined in this work,to clarify the dopant effect on the optical *** high stability of title crystalline material,against water,oxygen and heat,makes it promising for further application.

关键词： 0D Metal halide White light Perovskite Ions doping Excitation dependent

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Recent progress, challenges and prospects of electrolytes for fluoride-ion batteries

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Energy Reviews 2024年第3期3卷 102-128页

作者： Ming Zhang Xiaocao Cao Yaowei Hao Haodong Wang Jian Pu Bo Chi Zhongrong Shen 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 SciencesFuzhou350002China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamen361021China College of Chemical Engineering Fuzhou UniversityFuzhouFujian350116China School of Materials Science and Engineering State Key Laboratory of Material Processing and Die&Mould TechnologyHuazhong University of Science and TechnologyWuhan430074China

In the development of new electrochemical concepts for the fabrication of high-energy-density batteries,fluorideion batteries(FIBs)have emerged as one of the valid candidates for the next generation electrochemical energy storage technologies,showing the potential to match or even surpass the current lithium-ion batteries(LIBs)in terms of energy density,safety without dendritic grains,and elimination of dependence on scarce lithium and cobalt ***,the development of FIBs is still in its infancy and their performance is far from satisfactory,with issues such as the lower fluoride-ion conductivity of the electrolytes and the reversibility of the electrodes hindering their *** reviews have mainly focused on inorganic solid electrolytes with a brief emphasis on the development of various fluoride-ion conductors and their ion-conducting ***,this review summarizes the current developments in various electrolytes,a systematic overview of the current progress for various fluoride-ion electrolytes is presented by beginning with the history,structure and classification of FIBs,ion-transport mechanisms are briefly *** advances in different classes of fluoride-ion electrolytes are *** methods for optimizing the ionic conductivity characteristics of the fluoride-ion electrolytes are ***,an outlook on the future research direction of FIBs is given by highlighting some critical issues,challenges and prospects of fluoride-ion electrolytes.

关键词： Solid electrolyte Liquid electrolyte Composited electrolyte Fluoride-ion Conductivity

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A new class of crystalline X-ray induced photochromic materials assembled from anion-directed folding of a flexible cation

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chinese Chemical Letters 2024年第8期35卷 554-557页

作者： Hong-Jin Liao Zhu Zhuo Qing Li Yoshihito Shiota Jonathan P.Hill Katsuhiko Ariga Zi-Xiu Lu Lu-Yao Liu Zi-Ang Nan Wei Wang You-Gui Huang 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 350002China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamen 361021China fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China institute for Materials Chemistry and Engineering Kyushu UniversityFukuoka 819-0395Japan World Premier International(WPI)Center for Materials Nanoarchitectonics(MANA) National Institute for Materials Science(NIMS)Ibaraki 305-0044Japan

Electron-deficient viologens are widely used as ligands or structure-directing agents(SDAs)to synthesize crystalline X-ray induced photochromic ***,a new rational strategy of anion-directed fold-ing a flexible cation(H_(2)imb)^(2+)((H_(2)imb)^(2+)=di-protonated 2,3-bis(imidazolin-2-yl)-2,3-dimethylbutane)has been ***-donating Cl−and(ZnCl4)2−are used to direct folding a flexible electron-deficient(H_(2)imb)^(2+)*** complexes(H_(2)imb)(NO_(3))2(1),(H_(2)imb)Cl2·H_(2)O(2),and(H_(2)imb)ZnCl4(3)have been synthesized in which(H_(2)imb)^(2+)crystallize in an anti-conformation,88.8°-gauche,and 51.8°-gauche,*** contrary to X-ray silent complex 1,X-ray induced photochromism has been achieved in both complex 2 and *** intermolecular charge-transfer mechanism has been elucidated and the anion directed folding of(H_(2)imb)^(2+)has been validated to be critical to yield colored long-lived charge-separated states.

关键词： Supramolecular Photochromic X-ray induced Anion-directed folding Electron-deficient viologens

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High-intensity spatial-mode steerable frequency up-converter toward on-chip integration

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Opto-Electronic Science 2024年第4期3卷 12-20页

作者： Haizhou Huang Huaixi Chen Huagang Liu Zhi Zhang Xinkai Feng Jiaying Chen Hongchun Wu Jing Deng Wanguo Liang Wenxiong Lin Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of MatterChinese Academy of ScienceFuzhou 350002China Key Laboratory of Opto-Electronic Science and Technology for Medicine of Ministry of Education Fujian Provincial Key Laboratory of Photonics TechnologyCollege of Photonic and Electronic EngineeringFujian Normal UniversityFuzhou 350117China fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China College of Digital Economy Fujian Agriculture and Forestry UniversityFuzhou 350002China University of chinese academy of sciences Beijing 100049China.

Integrated photonic devices are essential for on-chip optical communication,optical-electronic systems,and quantum information *** develop a high-fidelity interface between photonics in various frequency domains without disturbing their quantum properties,nonlinear frequency conversion,typically steered with the quadratic(χ2)process,should be ***,another degree of freedom in steering the spatial modes during theχ2 process,with unprecedent mode intensity is proposed here by modulating the lithium niobate(LN)waveguide-based inter-mode quasi-phasematching conditions with both temperature and wavelength *** high incident light intensities(25 and 27.8 dBm for the pump and the signal lights,respectively),mode conversion at the sum-frequency wavelength with sufficient high output power(−7–8 dBm)among the TM01,TM10,and TM00 modes is realized automatically with characterized broad temperature(ΔT≥8°C)and wavelength windows(Δλ≥1 nm),avoiding the previous efforts in carefully preparing the signal or pump *** results prove that high-intensity spatial modes can be prepared at arbitrary transparent wavelength of theχ2 media toward on-chip integration,which facilitates the development of chip-based communication and quantum information systems because spatial correlations can be applied to generate hyperentangled states and provide additional robustness in quantum error correction with the extended Hilbert space.

关键词： integrated photonics LN waveguide sum-frequency generation spatial-mode steering on-chip integration

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Phosphine-Built-In Porous Organic Cage Supported Ultrafine Pd Nanoclusters Enable Highly Efficient and Regioselective Hydrogenation of Epoxides

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CCS Chemistry 2024年第10期6卷 2476-2488页

作者： Xin Zhou Zhaozhan Wang Zhe-Ning Chen Yong Yang CAS Key Laboratory of Bio-Based Materials Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101 Shandong Energy institute Qingdao 266101 College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266101 State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002 University of chinese academy of sciences Beijing 100049 fujian Provincial Key Laboratory of Theoretical and Computational Chemistry Xiamen UniversityXiamen 361005

Selective hydrogenation of epoxides has been regarded as an atom-economical and straightforward method for the synthesis of ***,it remains a big challenge in the precise control of *** date,the reaction enabled by a reusable and high-performance heterogeneous catalyst with excellent regioselectivity is very ***,we develop highly loaded and ultrafine Pd nanoclusters(NCs)encapsulated on a phosphinebuilt-in porous organic cage(FPPOC)for the catalytic hydrogenation of epoxides by molecular *** from the unique characters of uniform dispersion and strong interaction between Pd NCs and FPPOC,the resultant Pd NCs exhibited superior catalytic activity and excellent regioselectivity for the hydrogenation of epoxides under milder conditions.A diverse set of terminal and internal epoxides was efficiently reduced to the corresponding linear or branched alcohols in an extremely regioselective manner,well tolerating diverse functional ***,the catalyst demonstrates high stability and could be reused up to 10 times with marginal decay in activity and ***,the catalyst is applicable for scale-up synthesis with a record turnover number as high as 16,111,to the best of our knowledge,outperforming those previous state-of-the-art *** experiments and characterizations in combination with density functional theory calculations provide insight into the superior activity and excellent regioselectivity.

关键词： porous organic cage phosphine-built-in palladium nanoclusters regioselective hydrogenation epoxides

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1D p-type molecular-based coordination polymer semiconductor with ultrahigh mobility

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Science Bulletin 2024年第17期69卷 2705-2711页

作者： Chenhui Yu Xinxu Zhu Kefeng Li Guan-E Wang Gang Xu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China University of chinese academy of sciences Beijing 100049China

One-dimensional(1D)semiconductor nanostructures exhibit exceptional performance in mitigating short-channel effects and ensuring low power ***,the scarcity of high-mobility ptype 1D materials impedes further ***-based materials offer high designability in structure and properties,making them a promising candidate for 1D p-type semiconductor materials.A molecular-based 1D p-type material was developed under the guidance of coordination ***-HT(HT is the abbreviation of p-hydroxy thiophenol)combines the merits of highly orbital overlap between Cu and S,fully covered surface modification with phenol functional groups,and unique cuprophilic(Cu-Cu)*** such,Cu-HT has a remarkable hole mobility of 27.2 cm2V-1s-1,which is one of the highest reported values for 1D molecular-based materials to date and even surpass those of commonly used amorphous silicon as well as the majority of 1D inorganic *** achievement underscores the significant potential of coordination polymers in optimizing carrier transport and represents a major advancement in the synthesis of high-performance,1D p-type semiconductor materials.?2024 Science China *** by Elsevier *** Science China *** rights are reserved.

关键词： Molecular-basedmaterials Hole mobility Coordinationpolymer Field-effecttransistors

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