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Multifunctional indaceno[1,2-b:5,6-b']dithiophene chloride molecule for stable high-efficiency perovskite solar cells

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Science China Chemistry 2023年第1期66卷 185-194页

作者： Yong Li Qian Zhang Lidan Liu Dapeng Wang Zhike Liu Ningyi Yuan Jianning Ding Qiang Wang Shengzhong(Frank) Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710119China Dalian National Laboratory for Clean Energy iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of materials Science and Engineering Jiangsu Collaborative Innovation center of Photovoltaic Science and Engineering Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology Changzhou UniversityChangzhou 213164China

The additive strategy has emerged as an effective approach to improving the performance of perovskite solar cells(PSCs).Herein,a small acceptor-donor-acceptor type molecule indaceno[1,2-b:5,6-b’]dithiophene chloride(IDT-Cl)is designed and synthesized to advance both the efficiency and stability of FA_(0.85)MA_(0.15)PbI_(3)*** the IDT-Cl molecule,the S-group with high electron density promotes chemical bonding with the lead cations in the perovskite,resulting in enlarged grain size and smoother surface topography of the perovskite *** addition,the undercoordinated lead ions in the perovskite layer may be passivated by the carbonyl group in the 5-chloroindolin-2-one unit,thereby reducing the number of nonradiative recombination ***,the IDT-Cl adjusts the energy level mismatch between the perovskite and two adjacent carrier transport layers,leading to easy charge *** the multifunctional effect of the IDT-Cl molecule,the modified device yields a high power conversion efficiency(PCE)of 24.46%,8.8%higher than that of the control PSC(22.48%).More importantly,the hydrophobic alkyl side-chain of the IDT-Cl molecule further ensures enhanced humidity stability of the perovskite film and environmental,thermal,and light stabilities of the PSC devices.

关键词： non-fullerene multifunctional perovskite solar cell additive defect passivation

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Solution-processed quantum-dot light-emitting diodes combining ultrahigh operational stability,shelf stability,and luminance

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npj Flexible Electronics 2022年第1期6卷 949-955页

作者： Zi Ye Mengyu Chen Xingtong Chen Wenchen Ma Xiaojuan Sun Longjia Wu Xiongfeng Lin Yu Chen Song Chen Suzhou Key Laboratory of Novel Semiconductor-optoelectronics materials and Devices College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhouJiangsuPR China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow UniversitySuzhouJiangsuPR China School of Optoelectronic Science and Engineering&Collaborative Innovation center of Suzhou Nano Science and Technology Soochow UniversitySuzhouJiangsuPR China TCL Corporate research ShenzhenGuangdongPR China

The shelf-stability issue,originating from the ZnO-induced positive aging effect,poses a significant challenge to industrializing the display technology based on solution-processed quantum-dot light-emitting diodes(QLEDs).Currently,none of the proposed solutions can simultaneously inhibit exciton quenching caused by the ZnO-based electron-transporting layer(ETL)and retain other advantages of *** in this work,we propose a bilayer design of ETL in which a buffer layer assembled of SnO_(2) nanoparticles(NPs)suppresses the QD-ETL exciton quenching and tunes charge balance while ZnO NPs provide high electron *** a result,the bottom-emitting QLED combining capped ZnO and SnO_(2) buffer exhibit a maximum luminance over 100,000 cd m^(−2) and a T95 operational lifetime averaging 6200 h at 1000 cd m^(−2) on the premise of entirely inhibiting positive aging.

关键词： diodes stability quantum

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Direct oxygen removal from titanium aluminide scraps by yttrium reduction

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Transactions of Nonferrous Metals Society of China 2022年第7期32卷 2428-2437页

作者： Li-na JIAO Qi-sheng FENG Shi-yu HE Bao-hua DUAN Zhi-he DOU Chong-he LI Xiong-gang LU State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of materials Science and Engineering Shanghai UniversityShanghai 200072China School of Metallurgy and materials Engineering Jiangsu University of Science and TechnologyZhangjiagang 215600China Key Laboratory for Ecological Metallurgy of Multimetallic Mineral Ministry of EducationNortheastern UniversityShenyang 110819China Shanghai Special Casting Engineering Technology research center Shanghai 201605China School of materials Science and Engineering Shanghai Dianji UniversityShanghai 201306China

Titanium aluminum(TiAl)scraps with a high oxygen content were treated with yttrium(Y)in a liquid chemical deoxidization process for *** Gibbs free energy and the equilibrium constant of the deoxidization reaction were calculated,and the effects of the yttrium content and the system pressure on the oxygen content in the product were *** results showed that the oxygen in TiAl scraps could be removed by yttrium,and the oxygen content of the deoxidized TiAl scraps had only 10%of the original content after ***,the oxygen content of the deoxidized TiAl scraps was decreased with the increase of yttrium *** higher the chamber pressure,the greater the oxygen content in the final TiAl *** results were consistent with calculated *** microstructure of the deoxidized alloys was akin to that of the original material;however,Y_(2)O_(3) particles were observed in the deoxidized alloys.

关键词： titanium aluminum scrap yttrium deoxidation recycling

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Evolution of Berry curvature and reentrant quantum anomalous Hall effect in an intrinsic magnetic topological insulator

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Science China(Physics,Mechanics & Astronomy) 2021年第12期64卷 138-143页

作者： Chui-Zhen Chen Junjie Qi Dong-Hui Xu XinCheng Xie Institute for Advanced Study and School of Physical Science and Technology Soochow UniversitySuzhou 215006China Beijing Academy of Quantum Information Sciences Beijing 100193China Department of Physics Hubei UniversityWuhan 430062China International center for Quantum materials School of PhysicsPeking UniversityBeijing 100871China CAS center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China

Recently, the magnetic topological insulator(TI) MnBi2Te4 emerged as a competitive platform to realize quantum anomalous Hall(QAH) states. We report a Berry curvature splitting mechanism to realize the QAH effect in the disordered magnetic TI multilayers when switching from an antiferromagnetic order to a ferromagnetic order. We reveal that the splitting of spin-resolved Berry curvature, originating from the separation of the critical points during the magnetic switching, can give rise to a QAH insulator. We present a global phase diagram, and also provide a phenomenological picture to elucidate the Berry curvature splitting mechanism by the evolution of topological charges. At last, we predict that the Berry curvature splitting mechanism will lead to a reentrant QAH effect, which can be detected by tuning the gate voltage. Our theory will be instructive for the studies of the QAH effect in MnBi2Te4 in future experiments.

关键词： quantum anomalous Hall effect Berry curvature disorder localization

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Supramolecular Semi-convertible Hydrogel Enabled Self-Healing Responsive Lubrication Under Dynamic Shearing

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CCS Chemistry 2023年第11期5卷 2482-2496页

作者： Xuewei Zhang Kaiyao Shi Xuhao Yang Jian Wang Huan Liu Wenlong Song Shutao Wang State Key Laboratory of Supramolecular Structure and materials College of ChemistryJilin UniversityChangchun 130023 Department of Cardiology Jilin Provincial Key Laboratory for Genetic Diagnosis of Cardiovascular DiseaseChina-Japan Union Hospital of Jilin UniversityChangchun 130023 CAS Key Laboratory of Bio-inspired materials and Interfacial Science CAS Center for Excellence in NanoscienceTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190 university of Chinese Academy of Sciences Beijing 100190 Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of education School of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringInternational Research Institute for Multidisciplinary ScienceBeihang UniversityBeijing 100191

Cartilage-inspired hydrogel has attracted great interest due to its tunable mechanics and low ***,it is incapable of self-healing under a complex dynamic shearing *** this work,a self-healing semi-convertible hydrogel(SHSCH)is developed,which can recover its unique active lubricating function under *** on the cooperating strategy of noncovalent and covalent bonding,the SHSCH is composed of three interpenetrated networks including:(1)shearresponsive N-fluorenylmethoxycarbonyl-L-tryptophan(FT)supramolecular network,(2)self-healing polyhydroxyethyl acrylamide(PHEAA)network,and(3)rigid polyvinyl alcohol(PVA)covalent *** shearresponsive lubricating function and mechanical property can be self-healed under a shearing environment through the noncovalent hydrogen-bonding assembly of PHEAA associated by theπ–πassembly of *** asdeveloped SCH provides a self-healing model comparable with traditional self-healing lubricating materials through encapsulating lubricant microcapsules or infusing lubricants onto *** demonstrated a proofof-concept of the self-healing lubrication of a simplified artificial worn cartilage model under a dynamic shearing *** study will offer a potential strategy on designing the self-healing soft devices under dynamic stimuli far beyond the lubricating materials.

关键词： semi-convertible hydrogel self-healing shear response lubrication supramolecular hydrogel

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Phase investigations of manganese–bismuth alloyed in a microwave furnace

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Journal of Central South university 2020年第8期27卷 2220-2226页

作者： Panita THONGJUMPA Thanida CHAROENSUK Upsorn BOONYANG Phimphaka HARDING Chitnarong SIRISATHITKUL Division of Physics School of ScienceWalailak UniversityNakhon Si Thammarat 80160Thailand Functional materials and Nanotechnology center of Excellence Walailak UniversityNakhon Si Thammarat 80160Thailand Thailand center of Excellence in Physics Ministry of Higher EducationScienceResearch and Innovation328 Si Ayutthaya RoadBangkok 10400Thailand Division of Chemistry School of ScienceWalailak UniversityNakhon Si Thammarat 80160Thailand

Implementation of manganese–bismuth(MnBi)alloys as high-performance permanent magnets is a challenge for physicists and engineers because the ferromagnetic low-temperature phase(LTP)is not exclusively *** this work,melting powered by four commercial magnetrons of 2000–2500 W in a microwave furnace is demonstrated as a new route to alloy *** an argon atmosphere,microwave heating transferred to pieces of broken Bi ingots and Mn flakes for 2 h gave rise to products of inhomogeneous composition and *** electron micrographs were classified into three regions according to morphology and elemental ***-like clusters characterized as Mn precipitated over light solidified Bi-rich regions,and the MnBi phase was formed in homogeneous regions with a balanced composition between Mn and Bi.A ferromagnetic hysteresis loop was obtained in the ground powder with a coercivity of 40 kA/*** annealing at 553 K under a pressure of 414 kPa for 12 h enhanced the MnBi phase with extended regions of balanced *** follows that the coercivity was increased to 60 kA/***,remanent magnetization was slightly *** MnBi alloyed by microwave radiation can be further used in rare-earth-free magnets.

关键词： microwave manganese bismuth scanning electron microscopy magnetic properties coercivity

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Total conductivity,oxygen permeability and stability of perovskite-type oxide BaCo_(0.7)Fe_(0.2)Nb_(0.1)O_(3-δ)

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Rare Metals 2009年第2期28卷 202-208页

作者： Zhang, Yuwen Liu, Yong Wang, Chenglei Yang, Zhibin Ding, Weizhong Lu, Xionggang Shanghai Key Laboratory of Modern Metallurgy and materials Processing Shanghai University Shanghai 200072 China

The total conductivity,oxygen sorption property,oxygen permeability and stability of pure perovskite-type oxide BaCo0.7Fe0.2Nb0.1O3-δ (BCFNO) in real operating conditions were investigated. Its total conductivity was measured to be 3.6 S·cm-1 at 600°C. Though the total conductivity of the BCFNO membrane is much smaller than that of the Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCFO) membrane,the oxygen permeability of the BCFNO membrane is similar to that of the BSCFO membrane. SEM observation and EDX analysis of the BCFN...

关键词： perovskite-type oxide total conductivity oxygen permeability stability

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A novel coral-like garnet for high-performance PEO-based all solid-state batteries

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Science China materials 2022年第2期65卷 364-372页

作者： Jun Cheng Guangmei Hou Qing Sun Qiong Chen Deping Li Jianwei Li Zhen Zeng Kaikai Li Qunhui Yuan Jiajun Wang Lijie Ci State Key Laboratory of Advanced Welding and Joining School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China research center for Carbon Nanomaterials Key Laboratory for Liquid-Solid Structural Evolution&Processing of Materials(Ministry of Education)School of Materials Science and EngineeringShandong UniversityJinan 250061China MIIT Key Laboratory of Critical materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China

As one of the most promising next-generation energy storage devices,the lithium-metal battery has been extensively ***,safety issues and undesired lithium dendrite growth hinder its *** application of solid-state electrolytes has attracted increasing attention as they can solve safety issues and show great potential to inhibit the growth of lithium *** oxide(PEO)-based electrolytes are very promising due to their enhanced safety and excellent ***,they suffer from low ionic conductivity at room temperature and cannot effectively inhibit lithium dendrites at high temperatures due to the intrinsic semicrystalline properties and poor mechanical *** this work,a novel coral-like Li_(6.25)Al_(0.25)La_(3)Zr_(2)O_(12)(C-LALZO)is synthesized to serve as an active ceramic filler in *** PEO with LALZO coral(PLC)exhibits increased ionic conductivity and mechanical strength,which leads to uniform deposition/stripping of lithium *** Li symmetric cells with PLC do not cause a short circuit after cycling for 1500 h at 60℃.The assembled LiFePO_(4)/PLC/Li batteries display excellent cycling stability at both 60 and 50℃.This work reveals that the electrochemical properties of the composite electrolyte can be effectively improved by tuning the microstructure of the filler,such as the C-LALZO architecture.

关键词： coral-like garnet composite solid-state electrolyte all-solid-state battery

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Peptide hydrogelation triggered by enzymatic induced pH switch

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Science China(Physics,Mechanics & Astronomy) 2016年第7期59卷 76-81页

作者： Wei Cheng Ying Li Nanjing Stomatological Hospital Medical School of Nanjing University Jiangsu Engineering Technology research Centre of Environmental Cleaning materials Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlJiangsu Joint Laboratory of Atmospheric Pollution ControlCollaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science &Technology National Laboratory of Solid State Microstructures Nanjing University

It remains challenging to develop methods that can precisely control the self-assembling kinetics and thermodynamics of peptide hydrogelators to achieve hydrogels with optimal *** we report the hydrogelation of peptide hydrogelators by an enzymatically induced pH switch,which involves the combination of glucose oxidase and catalase with D-glucose as the substrate,in which both the gelation kinetics and thermodynamics can be controlled by the concentrations of *** novel hydrogelation method could result in hydrogels with higher mechanical stability and lower hydrogelation *** further illustrate the application of this hydrogelation method to differentiate different D-glucose levels.

关键词： glucose oxidase and catalase peptide hydrogel pH switch mechanical properties

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Polysulfide modified PtCu intermetallic nanocatalyst with enrichment realizes efficient electrooxidation ethanol to CO_(2)

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Nano research 2024年第4期17卷 2320-2327页

作者： Shuanglong Zhou Zheng Lv Liang Zhao Dan Zhang Zuocao Wang Yu Dai Bin Li Olga Starostenko Jianping Lai Lei Wang Key Laboratory of Eco-chemical Engineering Ministry of EducationTaishan scholar advantage and characteristic discipline team of Eco-chemical process and technologyLaboratory of Inorganic Synthesis and Applied ChemistryCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Foreign Languages Qingdao City UniversityQingdao 266106China College of materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China Institute of Macromolecular Chemistry of the National Academy of Sciences of Ukraine Kyiv 02160Ukraine Shandong Engineering research center for Marine Environment Corrosion and Safety Protection College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China

The main problem faced by ethanol oxidation reaction(EOR)includes low activity,poor selectivity,and *** the study,we found that polysulfide modified on the surface of PtCu intermetallic(IM)/C can simultaneously enrich hydroxyl and ethanol,which could effectively improve the catalytic activity,CO_(2) selectivity,and durability of *** mass activity and the specific activity of the product in 1 M KOH electrolyte reached 17.83 A·mgPt^(-1) and 24.67 mA·cm^(-2).The CO_(2) selectivity of polysulfide modified product achieved 93.5%,which was 30 folds higher than Pt/*** addition,the catalyst showed high catalytic *** mechanism study demonstrates that the surface modified polysulfide could significantly boost the enrichment effect of ethanol and hydroxyl species,accelerating C–C bond cleavage and CO oxidation.

关键词： Pt CO_(2) selectivity enrichment effect ethanol oxidation reaction(EOR) electrocatalyst

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