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Efficient and stable planar all-inorganic perovskite solar cells based on high-quality CsPbBr3 films with controllable morphology

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Journal of Energy Chemistry 2020年第7期29卷 8-15,I0001页

作者： Xiaojing Wan Ze Yu Wenming Tian Fuzhi Huang Shengye Jin Xichuan Yang Yi-Bing Cheng Anders Hagfeldt Licheng Sun State Key Laboratory of Fine Chemicals Institute of Artificial PhotosynthesisDUT-KTH Joint Education and Research Center on Molecular DevicesInstitute of Energy Science and TechnologyDalian University of Technology(DUT)Dalian 116024LiaoningChina State Key Laboratory of Molecular Reaction Dynamics and the Dynamic Research Center for Energy and Environmental Materials Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyLuoshi RoadWuhan 430070HubeiChina The Australian Centre for Advanced Photovoltaics(ACAP) Monash UniversityVictoria 3800Australia Laboratory of Photomolecular Science Ecole Polytechnique Federale de LausanneLausanne CH-1015Switzerland Department of Chemistry School of Engineering Sciences in ChemistryBiotechnology and HealthKTH Royal Institute of TechnologyStockholm 10044

All-inorganic cesium lead bromide(CsPbBr3)perovskite is attracting growing interest as functional materials in photovoltaics and other optoelectronic devices due to its superb ***,the fabrication of high-quality CsPbBr3 films still remains a big challenge by solution-process because of the low solubility of the cesium precursor in common ***,we report a facile solution-processed approach to prepare high-quality CsPbBr3 perovskite films via a two-step spin-coating method,in which the Cs Br methanol/H2 O mixed solvent solution is spin-coated onto the lead bromide films,followed by an isopropanol-assisted post-treatment to regulate the crystallization process and to control the film *** this fashion,dense and uniform CsPbBr3 films are obtained consisting of large crystalline domains with sizes up to microns and low defect *** effectiveness of the resulting CsPbBr3 films is further examined in perovskite solar cells(PSCs)with a simplified planar architecture of fluorine–doped tin oxide/compact Ti O2/CsPbBr3/carbon,which deliver a maximum power conversion efficiency of 8.11%together with excellent thermal and humidity *** present work offers a simple and effective strategy in fabrication of high-quality CsPbBr3 films for efficient and stable PSCs as well as other optoelectronic devices.

关键词： All-inorganic perovskite solar cells CsPbBr3 Morphology control Solution-processed Stability

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Review on DFT calculation of s-triazine-based carbon nitride

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Carbon Energy 2019年第1期1卷 32-56页

作者： Bicheng Zhu Bei Cheng Liuyang Zhang Jiaguo Yu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhouChina

To improve the photocatalytic performance of pristine photocatalysts,element doping,construction of composites and fabrication of novel nanostructures are recognized as universal modification *** methods have been experimentally verified to be effective in manifold photocatalytic application over various *** functional theory(DFT)calculation is a powerful and fundamental tool to pinpoint the intrinsic mechanism of the enhanced photocatalytic *** it holds the degree of precision ranging from atoms,molecules to unit ***,recent DFT calculation research progress of modified s-triazine-based graphitic carbon nitride(g-C3N4)systems as photocatalysts is *** specify,we collected information of doping site,formation energy,geometric,and electronic *** also discussed the synergistic effect of work function,Fermi level and band edge position on the built-in electric field,transfer route of photogenerated charge carriers and photocatalytic mechanism(traditional typeⅡor direct Z-scheme heterostructure).Moreover,we analyzed the geometric configuration,band structure,and stability of g-C3N4 nanocluster,nanoribbon,and ***,future perspective in the further theoretical revelation of g-C3N4-based photocatalysts is proposed.

关键词： charge transfer density functional theory electronic property g-C3N4 photocatalysis

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3d Spiral Model of the Wicking Effect For Continuous Polyester Filaments

SSRN

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SSRN 2022年

作者： He, Jiahao Li, Jiugang Yang, Qiang Xie, Zhiyun Jin, Xinpeng Sun, Xiaoxi Zhang, Wenlu Liu, Zhijiang Xu, Xiaopeng Xu, Weilin Li, Wenbin Guo, Jing School of Textile and Material Engineering Dalian Polytechinc University Dalian116000 China State Key Laboratory of New Textile Materials and Advanced Processing Technology of Hubei Province Wuhan430200 China College of Textile Science and Engineering Wuhan Textile University Wuhan430200 China

The wicking effect is one of the main factors to promote the afflux and transfer of liquid water in yarn and fabric. It is of great significance to the subsequent processing of products, especially the immersion and interface bonding of textile matrix composites. Twist impacts the arrangement and tightness of fibers inside the yarn and the wicking channel of liquid water. A mathematical model based on the three-dimensional helical capillary permeation mechanism related to twisting is established by assuming that the fibers in the yarn are uniform in diameter and arrangement. With the macroscopic force balance method, the function of liquid capillary rise with wicking time was deduced, and the rising state of liquid water in the yarn was simulated by Comsol. Subsequently, a series of wicking experiments were conducted on polyester filament yarns with different twists to verify the accuracy of the model. The results revealed that the experimental data coincided well with the theoretical prediction. © 2022, The Authors. All rights reserved.

关键词： Yarn

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Multifunctional mechanoluminescent material with enhanced interfacial synergistic effects: 2SrZn 2 S 2 O/ZnS heterojunction

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Journal of Alloys and Compounds 2025年 1035卷

作者： Qizheng Dong Huimin Xie Xiangyu Ren Ling He Xuefeng Lu Wenbo Zhang State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou 730050 China School of Material Science and Engineering Lanzhou University of Technology Lanzhou 730050 China

Mechanoluminescent (ML) materials have attracted considerable attention owing to their unique advantages. However, progress in this field is limited by the complexity of ML material types and the numerous influencing factors, which hinder breakthroughs in the development of advanced ML materials. In this study, a series of binary heterojunction materials composed of SrZn 2 S 2 O:Mn 2+ and ZnS were constructed, achieving a remarkable enhancement in luminescent performance. Both ML and photoluminescence properties exceeded those of the individual constituent phases. Notably, the ML intensity decreased by 92 % after 24 h of ball milling treatment of the heterojunction samples. Density functional theory calculations reveal that the enhancement in ML performance arises not only from optimized interfacial electron transport within the heterojunction but also from its structural stabilization effect, which mitigates crystal degradation. This discovery provides mechanistic insights into heterojunction-based ML materials, thereby supporting the development of high-performance ML devices. Practical applications are demonstrated in multiple scenarios, including anti-counterfeiting labels, paperless handwriting systems, and emergency rescue signal indicators, highlighting the material’s substantial application potential.

关键词： Luminous coatings

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Frustration-controlled quantum phase transition between multiple singular two-stage Kondo behaviors in a tetrahedral quadruple quantum dot structure

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Physical Review B 2022年第7期105卷 075430-075430页

作者： Peng-Chao Wang Yi-Hui Wang Chong Chen Jun Zhang Wei Li Nan Nan Jia-Ning Wang Jun-Tao Yang Amel Laref Yong-Chen Xiong School of Mathematics Physics and Optoelectronic Engineering and Collaborative Innovation Center for Optoelectronic Technology Hubei University of Automotive Technology Shiyan 442002 People's Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 People's Republic of China Department of Physics and Astronomy Science Faculty King Saud University Riyadh 11451 Saudi Arabia Shiyan Bureau of Science and Technology 16 Chaoyang North Road Shiyan 442000 People's Republic of China

Semiconductor quantum dots are considered to be promising candidates for the hardware of quantum information technology and optoelectronic devices. Herein, motivated by a tetrahedrally shaped colloidal quadruple quantum dot structure made from In-based III–V semiconductors, which has been synthesized very recently by Leemans et al. [J. Am. Chem. Soc., 143, 4290 (2021)], we provide timely insight into the electronic transport and the quantum phase transition (QPT) for such an architecture. When the interdot hopping between different side dots (t2) is absent, a singular two-stage Kondo effect is revealed for small central-side coupling t1. The two screening processes are separated by an energy scale of the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction, and the fitting parameters deviate from the regular ones of the side-coupled double dot system. The RKKY interaction and temperature are well illustrated by functions of t14/(UTK12), where U and TK1 are the on-site electron-electron repulsion and the first Kondo temperature, respectively. When t2 turns on, the ground state of the side dots transits from a spin quadruplet to a magnetic frustration phase, and then to a singlet, through two first-order QPTs. In the frustration phase, another new two-stage Kondo effect is demonstrated, which includes the process of screening the local spin on the central dot firstly, and then that on the neighborless side dot is screened at a lower temperature. Both the Kondo temperatures are found to be rather sensitive to t2. When t2 is large enough, the reappearance of the regular Kondo effect is found. With fixed t2=0, charging the central dot triggers a transition from an antiferromagnetic correlation among the side dots to a ferromagnetic one, accompanied by a Kondo behavior in the central dot. We adopt the state-of-the-art numerical renormalization group method to implement the above behaviors, combined with analytical arguments.

关键词： Kondo effect Quantum phase transitions Quantum transport

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Curvature Conservation and Conduction Modulation for Symmetric Charged Ferroelectric Domain Walls

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SSRN 2024年

作者： Fan, Yuanyuan Liang, Deshan Yang, Huayu Liang, Chen Dong, Shouzhe Gao, Rongzhen Liang, Minchuan Yang, Jia Wang, Yue Ai, Hui Ma, Ji Ma, Jing Zhang, Jinxing Chen, Long-Qing Wang, Jing Nan, Ce-Wen Huang, Houbing Advanced Research Institute of Multidisciplinary Science School of Materials Science and Engineering Beijing Institute of Technology Beijing100081 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China Analysis & Testing Center Beijing Institute of Technology Beijing100081 China School of Material Science and Engineering Kunming University of Science and Technology Yunnan Kunming650093 China Department of Physics Key Laboratory of Multi-scale Spin Physics Ministry of Education Beijing Normal University Beijing100875 China Department of Materials Science and Engineering Pennsylvania State University University ParkPA16802 United States

Curvature conservation is a common feature for the physical properties with topological constraints, from the macroscopic cosmic string loops to the microscopic quantized vortex rings in superfluid. Interestingly, ferroelectric domain-wall curvature is important to determine its conduction, which is the key parameter for designing domain-wall nanoelectronic devices. Here, we demonstrate the curvature conservation of the charged domain walls confined in ferroelectric topological structures with specific domain symmetry by combining piezoelectric force microscopy, conducting atomic force microscopy and phase-field simulations. Significantly, the intrinsic conductivity of the charged domain walls, exhibits an inverse functional relationship with the local domain-wall curvature in the ferroelectric BiFeO3 nano-islands, which can also be precisely and continuously modulated by applying an electric field. This work provides us with an insightful understanding of the conduction mechanism of charged domain walls confined in ferroelectric topological structures with high degree of spatial symmetry, which paves the way for the application of charged domain walls as flexible conducting channels with continuously changing resistance states to be used for ferroelectric domain-wall memristors. © 2024, The Authors. All rights reserved.

关键词： Domain walls

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Recent advances in Ru-based electrocatalysts for oxygen evolution reaction

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Journal of materials Chemistry A 2022年第4期11卷 1634-1650页

作者： Jie Ying Jiang-Bo Chen Yu-Xuan Xiao Susana I. Cordoba de Torresi Kenneth I. Ozoemena Xiao-Yu Yang School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai 519082 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Shenzhen Research Institute Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao) Wuhan University of Technology Wuhan China Instituto de Química Universidade de São Paulo Av. Prof. Lineu Prestes 748 05508-000 São Paulo Brazil Molecular Sciences Institute School of Chemistry University of the Witwatersrand Private Bag 3 Johannesburg 2050 South Africa

The oxygen evolution reaction (OER), as a four-electron transfer process with large overpotential loss that is also kinetically sluggish, is one of the most crucial electrochemical processes to convert renewable energy into chemical fuels. Ruthenium (Ru)-based electrocatalysts for the OER have several advantageous features including high activity, pH-universality and the lowest price in the noble metal family. However, the instability of Ru-based catalysts in the OER is a central hurdle limiting their widespread application. This review focuses on recent developments made in the field of Ru-based OER catalysts. In the coverage, first the characteristics of Ru-based OER catalysts such as the OER mechanism, intrinsic activity and stability issue are discussed. Then, recently reported Ru-related catalysts falling in the Ru metal and Ru compound subclasses are described with special emphasis being given to a discussion of activity/stability-enhancing strategies. Finally, several challenges and future perspectives in this field are summarized. It is anticipated that this review will promote a better understanding of Ru-based OER catalysts and lead to new strategies to design active and stable Ru-materials.

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Sisyphus effects in hydrogen electrochemistry on metal silicides enabled by silicene subunit edge

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Science Bulletin 2019年第9期64卷 617-624页

作者： Zechao Zhuang Yong Li Jiazhao Huang Zilan Li Kangning Zhao Yunlong Zhao Lin Xu Liang Zhou Lyudmila V. Moskaleva Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of Technology Institute of Applied and Physical Chemistry and Center for Environmental Research and Sustainable Technology University of Bremen Advanced Technology Institute University of Surrey Department of Chemistry University of the Free State

Nonmetal elements strictly govern the electrochemical performance of molybdenum ***,the exact role played by nonmetals during electrocatalysis remains largely *** intermetallic MoSi_2comprising silicene subunits,we present an unprecedented hydrogen evolution reaction(HER)behavior in aqueous alkaline *** continuous operation,the HER activity of MoSi_2shows a more than one order of magnitude improvement in current density from 1.1 to 21.5 mA cm^(à2)at 0.4 V ***,this activation behavior is highly reversible,such that voltage withdrawal leads to catalyst inactivation but another operation causes ***,the system shows dynamics strikingly analogous to the legendary Sisyphus’labor,which drops and recovers in a stepwise manner repeatedly,but never succeeds in reaching the top of the *** WSi_2behaves almost the same as MoSi_2,whereas other metal silicides with silicyne subunits,including CrSi_2and TaSi_2,do not exhibit any anomalous behavior.A thin amorphous shell of MoSi_2is observed after reaction,within which the Si remains partially oxidized while the oxidation state of Mo is basically ***-principles calculations further reveal that the adsorption of hydroxide ions on silicene subunit edges and the subsequent Si vacancy formation in MoSi_2jointly lead to the anomalous HER kinetics of the adjacent Mo active *** work demonstrates that the role of nonmetal varies dramatically with the electronic and crystallographic structures of silicides and that silicene structural subunit may serve as a promoter for boosting HER in alkaline media.

关键词： Sisyphus effect Electrochemistry Metal silicides Silicene subunit Hydrogen evolution reaction

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Ti-MOF Derived N-Doped TiO2 Nanostructure as Visible-light-driven Photocatalyst

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Chemical Research in Chinese Universities 2020年第3期36卷 447-452页

作者： HE Yilei ZHANG Xing WEI Yanze CHEN Xiaoyu WANG Zumin YU Ranbo Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversiw of Science and Technology BeijingBeijing 100083P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Key Laboratory of Advanced Material Processing&Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002P.R.China

Nanostructured N-doped TiO2 photocatalyst has been prepared via a new approach from Ti-based MOF[NH2-MIL-125(Ti)]*** success of N doping enhances light absorption and narrows the ***,the as-prepared nanostructure is constructed with tiny nanoparticles and resembles a pie-like morphology inherited from the MOF,which accelerates electron ***,as a photocatalyst for the degradation of methylene blue(MB)under visible light irradiation,the N-doped TiO2(N-TiO2)nanostructure shows higher photocatalytic activity with a reaction rate constant of 0.018min^-1 than that of the TiO2-P25 and TiO2 under the visible light.

关键词： TiO2 Mctal-organic framcwork Photo-degradaton N doped Visible-light photocatalysis

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Nanostructured BiVO4 Derived from Bi-MOF for Enhanced Visible-light Photodegradation

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Chemical Research in Chinese Universities 2020年第1期36卷 120-126页

作者： CHEN Jianfei CHEN Xiaoyu ZHANG Xing YUAN Yao BI Ruyi YOU Feifei WANG Zumin YU Ranbo Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Key Laboratory of Advanced Material Processing&Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002P.R.China

BiVO4,a promising visible-light responding photocatalyst,has aroused extensive research interest because of inexpensiveness and excellent chemical ***,its main drawback is the poor photoinduced charge-transfer *** nanostructures is an effective way to tackle this ***,we put forward a new method to prepare nanostructured BiVO4 from Bi-based metal-organic frameworks[Bi-MOF(CAU-17)]*** as-prepared material has a rod-like morphology inherited from the Bi-MOF sacrificial template and consists of small nanoparticle as building *** with its counterparts prepared by conventional methods,MOF-derived nanostructured BiVO4 shows better light absorption ability,narrower bandgap,and improved electrical conductivity as well as reduced ***,BiVO4 nanostructure demonstrates high photocatalytic activity under visible light towards the degradation of methylene *** blue can be degraded up to 90%within 30 min with a reaction rate constant of 0.058 ***,the cycling stability of the catalyst is excellent to withstand unchanged degradation efficiency for at least 5 cycles.

关键词： BiVO4 Nanostructure Metal-organic framework Ternary metal oxide Photocatalysis

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