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High-performance all-polymer solar cells with only 0.47 eV energy loss

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science china Chemistry 2020年第10期63卷 1449-1460页

作者： Qiang Wu wei Wang Tao Wang Rui sun Jing Guo Yao Wu Xuechen Jiao Christoph J.Brabec Yongfang Li Jie Min The Institute for Advanced Studies Wuhan UniversityWuhan 430072China Beijing National Laboratory for Molecular sciences Beijing 100190China Key Laboratory of materials Processing and Mold(Ministry of Education) Zhengzhou UniversityZhengzhou 450002China department of materials {2. and Engineering Monash UniversityAustralian SynchrotronClaytonVictoriaAustralia Institute of materials for Electronics and Energy technology(i-MEET) Friedrich-A lexander-Universitat-Erlangen-NiirnbergErlangenGermany

The field of all-polymer solar cells(all-PSCs)has experienced rapid development during the past few years,mainly driven by the development of efficient polymer ***,the power conversion efficiencies(PCEs)of the all-PSCs are still limited by insufficient light absorption of the donor/acceptor blend and large energy loss in *** herein designed a polymer acceptor PYT1 constructed n-type molecular acceptor Y5-C2. as the key building block and blended it with a polymer donor PM6 to obtain an all-polymer photoactive *** optimized PM6:PYT1 all-PSCs achieved a record higher PCE of 13.43%with a very low energy loss of 0.47 eV and a photoresponse of up to 900 nm compared with the Y5-C2. based device with a best PCE of 9.42..Furthermore,the PCEs of the PM6:PYT1 all-PSCs are relatively insensitive to the 1-chloronaphthalene(CN)additive contents and active layer *** results also highlight the effect of CN additive on PM6:PYT1 morphology,i.e.,charge generation,and transport find an optimized balance,and radiative and non-radiative loss is simultaneously reduced in the *** work promotes the development of high-performance polymer acceptors and heralds a brighter future of all-PSCs for commercial applications.

关键词： all-polymer solar cells polymer acceptor absorption coefficient energy loss mechanical stability

Single-molecule imaging of dinitrogen molecule adsorption on individual iron phthalocyanine

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Nano Research 2020年第9期13卷 2393-2398页

作者： Chengding Gu Jia Lin Zhang Jian Qiang Zhong Qian Shen Xiong Zhou Kaidi Yuan Shuo sun Xu Lian Zhirui Ma wei Chen department of Chemistry National University of SingaporeSingapore 117543Singapore department of Physics National University of SingaporeSingapore 117542Singapore department of Interface science Fritz-Haber-Institut der Max-Planck-GesellschaftBerlin 14195Germany Institute of Advanced materials Nanjing Tech UniversityNanjing 210009China BNLMS College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China School of Physical science and technology Shanghai Tech UniversityShanghai 200031China Joint School of National university of Singapore and Tianjin university International Campus of Tianjin UniversityFuzhou 350207China National university of Singapore(Suzhou)Research Institute Suzhou 215123China

Nitrogen fixation is a vital process for both nature and *** the nitrogenase can reduce nitrogen in ambient environment in nature,the industrialized Haber-Bosch process is a high temperature and high-pressure *** the discovery of the first dinitrogen complex in 1965,many dinitrogen complexes are prepared in a homogeneous solution to mimic the nitrogenase enzyme in ***,studies of the heterogeneous process on surface are rarely ***,molecular scale characterization for such dinitrogen complex is ***,we present a simple model system to investigate,at the single-molecule level,the binding of dinitrogen on a surface confined iron phthalocyanine(FePc)monolayer through the combination of in-situ low-temperature scanning tunneling microscopy(LT-STM)and X-ray photoelectron spectroscopy(XPS)*** iron center in FePc molecule deposited on Au(111)and highly oriented pyrolytic graphite(HOPG)surface can adsorb dinitrogen molecule at room temperature and low pressure.A comparative study reveals that the adsorption behaviors of FePc on these two different substrates are *** bond is formed between the dinitrogen and the Fe atom in the FePc molecule,which greatly modifies the electronic structure of *** bonding is reversible and can be manipulated by applying bias using a STM tip or by thermal annealing.

关键词： single-molecule dinitrogen iron phthalocyanine axial coordination

Optimizing hydrogen ad/desorption of Mg-based hydrides for energy-storage applications

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Journal of materials science & {2. 2023年第10期141卷 221-235页

作者： Zeng-Yi Li Yu-Jia sun Chen-Chen Zhang Sheng wei Li Zhao Ju-Lan Zeng Zhong Cao Yong-Jin Zou Hai-Liang Chu Fen Xu Li-Xian sun Hong-Ge Pan Guangxi Key Laboratory of Information materials and Guangxi Collaborative Innovation Center of Structure and Property for New Energy and materials School of Material Science&EngineeringGuilin University of Electronic TechnologyGuilin 541004China department of Radiology Stanford UniversityStanfordCA 94305USA School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China Beijing Advanced Innovation Center for materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China School of Chemistry and Chemical Engineering Changsha University Of Science&TechnologyChangsha 410114China Institute of science and technology for New Energy Xi’an Technological UniversityXi’an 710021China

Hydrogen energy is expected to be an“ideal fuel”in the era of *** discovery,de-velopment,and modification of high-performance hydrogen storage materials are the keys to the fu-ture development of solid-state hydrogen storage and hydrogen energy *** hydride(MgH_(2.),with its high hydrogen storage capacity,abundant natural reserves,and environmental friend-liness,has been extensively ***,we briefly summarize the typical structure and hy-drogenation/dehydrogenation reaction mechanism of MgH_(2.and provide a comprehensive overview of strategies to effectively tune the thermodynamics and kinetics of Mg-based materials,such as alloy-ing,nanosizing,the introduction of additives,and composite *** substantial efforts,great achievements have been achieved,such as lower absorption/desorption temperatures and better cy-cling ***,some pivotal issues remain to be addressed,such as unfavorable hydro-genation/dehydrogenation factors,harsh conditions,slow kinetics,incomplete dehydrogenation,low hy-drogen purity,expensive catalysts,and a lack of valid exploration of mechanisms in the hydrogena-tion/dehydrogenation ***,some future development prospects of MgH_(2.in energy-efficient conversion and storage have been presented,including advanced manufacturing ways,stabilization of nanostructures,the introduction of additives combined with structural modification,and utilization of advanced characterization techniques.

关键词： Mg-based hydrides Hydrogen storage A lloying Catalysts Mechanism

Ang-(1-7)exerts anti-inflammatory and antioxidant activities on high glucose-induced injury by prohibiting NF-κB-IL-1βand activating HO-1 pathways in HUVECs

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BIOCELL 2022年第4期46卷 1053-1066页

作者： FEI CHENG YIQIAN DING QING XU wei ZHANG YULAN ZHEN JING LIU SHICHENG LI CHANG TU GUOHUA lai JUN LAN JINGFU CHEN department of Cardiovascular Medicine Dongguan Songshan Lake Center HospitalDongguan Cardiovascular InstituteDongguan Shilong People’s Hospital Affiliated to Southern Medical UniversityDongguan523326China department of Ultrasound The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina department of Cardiology Huangpu Division of the First Affiliated HospitalSun Yat-sen UniversityGuangzhou510700China department of Oncology Dongguan Third People’s HospitalDongguan523326China Second Ward of Internal Medicine Dongguan Eighth People’s HospitalDongguan Children’s HospitalDongguan523003China

Previous reports have suggested that Ang-(1-7)may have a protective effect in endothelial cells against high glucose(HG)-induced cell injury thanks to a modulatory mechanism in the NF-κB signaling *** this study,we have examined whether NF-κB-IL-1βand Heme oxygenase-1(HO-1)pathways contribute to the protection of Ang-(1-7)against hyperglycemia-induced inflammation and oxidative stress in human umbilical vein endothelial cells(HUVECs).Our results indicate that time-varying exposures of HUVECs,from 1 h to 2. h,to high glucose concentrations result in an increased expression of phosphorylated(p)-p65 and HO-1 in a time-dependent *** an inhibitor of NF-κB,pyrrolidinedithiocarbamic acid(PDTC)suppressed IL-1βproduction induced by *** note,HUVECs previously treated with Ang-(1-7)(2.M)for 30 min before being exposed to HG concentrations significantly ameliorated the HG-increased in p-p65 and IL-1βexpression;whereas obviously up-regulated the level of HO-1,along with inhibition of oxidative stress,inflammation,and the HG-induced ***,when HUVECs were previously treated either with PDTC or IL-1Ra for 30 min before being exposed to HG,it significantly prevented damages caused by high glucose concentrations mentioned above,while the treatment of HO-1 inhibitor Sn-protoporphyrin(SnPP)before exposure to both HG and Ang-(1-7)significantly blocked the protective effect exerted by Ang-(1-7)on endothelial cells against injuries induced by HG mentioned *** conclude,the data of this study showed that activation and inhibition of the NF-κB-IL-1βpathway and HO-1 pathway may constitute an important defense mechanism against endothelial cell damage caused by HG *** additionally gave new evidence showing that exogenous Ang-(1-7)exerts a protective effect on HUVECs against the HG-induced cell injury via the inhibition and the activation of the NF-κB-IL-1βpathway and the HO-1 pathway,respectively.

关键词： Angiotensin-(1-7) High glucose Human umbilical vein endothelial cells NF-κB IL-1β HO-1

Function-oriented design:A novel strategy for advanced biomedical materials

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Journal of materials science & {2. 2023年第14期145卷 197-209页

作者： Zhiyu Zhou Wentao Wang Jianmin Wang Hongshui Wang Yi Xia wei Zhang Yuxiao lai Xiao Lin Yongcan Huang Xuenong Zou Martin J.Stoddart Zhen Li wei Tian Shaoyu Liu Xinbao Wu Manman Gao Junhong Li Lei Yang Dafu Chen department of Orthopaedic Surgery the Seventh Affiliated Hospital of Sun Yat-sen UniversityShenzhen 518107China Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology the First Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510080China Center for Health science and Engineering School of Health Sciences and Biomedical EngineeringHebei University of TechnologyTianjin 300130China Centre for Translational Medicine Research&Development Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518063China Orthopedic Institute and department of Orthopedics the First Affiliated HospitalSoochow UniversitySuzhou 215000China Shenzhen Engineering Laboratory of Orthopaedic Regenerative Technologies Department of Spine SurgeryPeking University Shenzhen HospitalShenzhen 518034China AO Research Institute Davos Davos7270Switzerland h Laboratory of Bone Tissue EngineeringBeijing Laboratory of Biomedical MaterialsBeijing Research Institute of Orthopaedics and TraumatologyBeijing Jishuitan HospitalBeijing 100035China department of Sport Medicine Institute of Translational Medicinethe First Affiliated Hospital of Shenzhen UniversityShenzhen Second People’s HospitalShenzhen 518025China Shenzhen Key Laboratory of Anti-aging and Regenerative Medicine Department of Medical Cell Biology and GeneticsHealth Sciences CenterShenzhen UniversityShenzhen 518060China The department of Orthopaedics and Trauma the Affiliated Hospital of Yunnan UniversityYunnan UniversityKunming 650091China

It has always been a dream to construct tissues and even organs for transplantation to replace those with defects caused by diseases or *** engineering is another milestone in the developmental history of life science after cellular and molecular ***,despite decades of rapid de-velopment,tissue-engineered biomaterials have not been widely used *** constructed by physical and chemical methods have lots of difficulty in precisely mimicking the macroscopic and mi-croscopic structures of human *** ultimate way to build organoid tissue for regeneration is to enable the cells to take the initiative and build suitable *** on the thoughts of tissue engi-neering,organoid {2. holds great potential as a research tool for a wide range of fields,including developmental biology,disease pathology,cell biology,precision medicine,and drug toxicity and efficacy *** {2. also holds tremendous potential for regenerative medicine,as organoids present the possibility for autologous and allogeneic cell therapy through the replacement of damaged or dis-eased tissues with organoid-propagated tissue or stem cell *** this review work,we briefly outlook the development history of organoid {2.,summarize the current bottlenecks and the un-derlying reasons,and propose the unified term“function-oriented design in tissue engineering”,a new topic that may provide a solution to overcome these bottlenecks.

关键词： Biomaterial Organoid Tissue engineering Function-oriented design

Impedance Studies of Spinel LiMn_2._4 Electrode/electrolyte Interfaces

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Chemical Research in Chinese Universities 2008年第4期24卷 511-515页

作者： ZHUANG Quan-chao FAN Xiao-yong XU Jin-mei wei Guo-zhen DONG Quan-feng sun Shi-gang School of materials science and Engineering China University of Mining ＆ Technology Xuzhou 221116 P. R. China State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry Xiamen University Xiamen 361005 P. R. China

The formation process of solid electrolyte interphase（SEI） film on spinel LiMn2.4 electrode surface was studied by electrochemical impedance spectroscopy（EIS） during the initial storage in 1 mol/L LiPF6-EC：DMC：DEC electrolyte and in the subsequent first charge-discharge cycle. It has been demonstrated that the SEI film thickness increased with the increase of storage time and spontaneous reactions occurring between spinel LiMn2.4 electrode and electrolyte can be prevented by the SEI film. In the first charge-discharge cycle succeeding the storage, the electrolyte oxidation coupled with Li-ion insertion is evidenced as the main origin to increase the resistance of SEI film. The results also confirm that the variations of the charge transfer resistance（Rot） with the electrode potential（E） can be well described using a classical equation.

关键词： Li-ion batteries SEI film Electrochemical impedance spectroscopy Spinel LiMn2.4

Atomic origin of spin-valve magnetoresistance at the SrRuO3 grain boundary

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National science Review 2020年第4期7卷 755-762页

作者： Xujing Li Li Yin Zhengxun lai Mei Wu Yu Sheng Lei Zhang Yuanwei {2. Shulin Chen Xiaomei Li Jingmin Zhang Yuehui Li Kaihui Liu Kaiyou Wang Dapeng Yu Xuedong Bai Wenbo Mi Peng Gao Electron Microscopy Laboratory School of Physics Peking University Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Tianjin Key Laboratory of Low Dimensional materials Physics and Preparation technology School of Science Tianjin University International Center for Quantum materials Peking University State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences State Key Laboratory for Artificial Microstructure & Mesoscopic Physics School of Physics Peking University Collaborative Innovation Centre of Quantum Matter College of materials science and Opto-Electronic {2. University of Chinese Academy of Sciences Shenzhen Institute for Quantum science and Engineering and Department of Physics Southern University of Science and Technology

Defects exist ubiquitously in crystal materials, and usually exhibit a very different nature from the bulk ***, their presence can have significant impacts on the properties of *** it is well accepted that the properties of defects are determined by their unique atomic environments, the precise knowledge of such relationships is far from clear for most oxides because of the complexity of defects and difficulties in ***, we fabricate a 36.8°Sr RuO3grain boundary of which the transport measurements show a spin-valve *** identify its atomic arrangement, including oxygen,using scanning transmission electron microscopy and *** on the as-obtained atomic structure, the density functional theory calculations suggest that the spin-valve magnetoresistance occurs because of dramatically reduced magnetic moments at the *** ability to manipulate magnetic properties at the nanometer scale via defect control allows new strategies to design magnetic/electronic devices with low-dimensional magnetic order.

关键词： spin-valve magnetic defects electron microscopy grain boundary

3,4,5-Triphenyl-1,2.4-triazole-based multifunctional n-type AIEgen

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science china Chemistry 2017年第5期60卷 635-641页

作者： Yang Shi Yuanjing Cai Yi Jia Wang Ming Chen Han Nie wei Qin Haoke Zhang Jing Zhi sun Anjun Qin Ben Zhong Tang Key Laboratory of Macromolecular Synthesis and Functionalization Ministry of Education Department of Polymer Science and EngineeringZhejiang University Guangdong Innovative Research Team State Key Laboratory of Luminescent Materials and Devices South China University of Technology department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionThe Hong Kong University of Science & Technology

The luminogens with aggregation-induced emission(AIEgens) characteristics have been widely applied in diverse areas. However,the n-type AIEgens are to be further developed. In this paper, we designed and synthesized an n-type multifunctional AIEgen of tetraphenylethene-substituted 3,4,5-triphenyl-4H-1,2.4-triazole(BTPE-TAZ). This AIEgen can serve as both light-emitting and electron-transporting layers in organic light-emitting devices. Moreover, it also exhibits the interesting optical waveguide and reversible mechanochromic luminescence properties, which are of great potential for practical applications.

关键词： aggregation-induced emission organic light-emitting diodes electron transport optical waveguidc,mechanoehromic luminescence

Interface synergistic effects induced multi-mode luminescence

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Nano Research 2022年第5期15卷 4457-4465页

作者： Ronghua Ma Chunfeng Wang wei Yan Mingzi sun Jianxiong Zhao Yuantian Zheng Xu Li Longbiao Huang Bing Chen Feng Wang Bolong Huang Dengfeng Peng Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China department of Applied Biology and Chemical technology The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SAR 999077China department of materials {2. and Engineering City University of Hong Kong83 Tat Chee AvenueHong KongHong Kong SAR 999077China

Mechanoluminescence(ML)has become the most promising material for broad applications in display and sensing devices,in which ZnS is the most commonly studied one due to its stable and highly repetitive ML *** this work,we have successfully prepared the biphase ZnS on a large scale through the facile in-air molten salt protection *** obtained biphase has the best ML properties,which is mainly attributed to the synergistic effects of piezo-photonic,defect,and interface *** calculations have confirmed that the defects activate the local S and Zn sites and reduce the energy barrier for electron *** much stronger X-ray induced luminescence than the commercial scintillator is also *** application of ZnS particles in both papers and inks delivers superior ***,ZnS particles based screen printing ink is able to directly print on paper,plastic and other carriers to form clear *** proposed paper and ink hold great potentials in applications of information security and anti-counterfeiting based on the multi-mode luminescence *** work provides a new avenue to understand and realize the high-performance multi-mode luminescence,inspiring more future works to extend on other ML materials and boosting their practical applications.

关键词： interface synergetic effects multi-mode luminescence mechanoluminescence biphase engineering anti-counterfeiting