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Bandgap engineering of tetragonal phase CuFeS_(2)quantum dots via mixed-valence single-atomic Ag decoration for synergistic Cr(VI)reduction and RhB degradation

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Chinese Chemical Letters 2021年第11期32卷 3450-3456页

作者： Yangzi Shangguan Yuanhao Zhou Renji Zheng Xuezhen Feng Qiuyue Ge Ranhao Wang Dazhong Yang Wenfei Wei Xiaoyong Wu Jia Lin Hong Chen Department of Physics Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric PowerShanghai University of Electric PowerShanghai 200090China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution ControlSchool of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Hubei Key Laboratory of Mineral Resources Processing and Environment School of Resources and Environmental EngineeringWuhan University of TechnologyWuhan 430070China

Bandgap engineering through single-atom site binding on semiconducting photocatalyst can boost the intrinsic activity,selectivity,carrier separation,and electron ***,we report a mixed-valence Ag(0)and Ag(I)single atoms co-decorated semiconducting chalcopyrite quantum dots(Ag/CuFeS_(2)QDs)*** demonstrates efficient photocatalytic performances for specific organic dye(rhodamine B,denoted as RhB)as well as inorganic dye(Cr(VI))removal in water under natural sunlight *** RhB degradation and Cr(VI)removal efficiencies by Ag/CuFeS_(2)QDs were 3.55 and 6.75 times higher than those of the naked CuFeS_(2)QDs at their optimal pH conditions,***,in a mixture of RhB and Cr(VI)solution under neutral condition,the removal ratio has been elevated from 30.2%to 79.4%for Cr(VI),and from 95.2%to 97.3%for RhB degradation by using Ag/CuFeS_(2)QDs after 2 h sunlight *** intrinsic mechanism for the photocatalytic performance improvement is attributed to the narrow bandgap of the single-atomic Ag(I)anchored CuFeS_(2)QDs,which engineers the electronic structure as well as expands the optical light response ***,the highly active Ag(0)/CuFeS_(2)and Ag(I)/CuFeS_(2)effectively improve the separation efficiency of the carriers,thus enhancing the photocatalytic *** work presents a highly efficient single atom/QDs photocatalyst,constructed through bandgap engineering via mixed-valence single noble metal atoms binding on semiconducting *** paves the way for developing high-efficiency single-atom photocatalysts for complex pollutions removal in dyeing wastewater environment.

关键词： Single-atom catalysts Bandgap engineering Cr(VI)reduction Organic pollutants degradation Dyeing wastewater treatment

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Contact optimisation strategy for wafer-scale field-effect transistors based on two-dimensional semiconductors

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Journal of Materials science & technology 2023年第2期133卷 230-237页

作者： Ling Tong Xiaojiao Guo Zhangfeng Shen Lihui Zhou Jingyi Ma Xinyu Chen Honglei Chen Yin Xia Chuming Sheng Saifei Gou Die Wang Xinyu Wang Xiangqi Dong Yuxuan Zhu Xinzhi Zhang David Wei Zhang Sheng Dai Xi Li Peng Zhou Yangang Wang Wenzhong Bao State Key Laboratory of ASIC and System School of MicroelectronicsFudan UniversityShanghai 200433China College of Biological Chemical Science and EngineeringJiaxing UniversityJiaxing 314001China Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Institute of Fine ChemicalsSchool of Chemistry&Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Surface Physics and Department of Physics Fudan UniversityShanghai 200433China

Two-dimensional(2D)semiconductors can be utilized to continually miniaturize nanoscale electronic ***,achieving a practical solution for satisfying electrical contact with 2D semiconductors remains *** this study,we developed a novel contact structure with transferred multilayer(t-ML)MoS 2 by integrating both edge and top *** in-situ plasma treatment for the edge of the MoS 2 channel and successive metal deposition,we achieved 16 times lower contact resistivity(22.8 kΩμm)than that of the top contacted *** thickness-dependent electrical measurement indicates that edge contact is highly effective with thick MoS 2 due to the alleviated current-crowding effect re-sulting from the small contact *** temperature-dependent transport measurement further confirms the effective minimization of the influence from the Schottky barrier and tunnelling ***,the simplified resistor network model and energy-band diagram were proposed to understand the carrier transport *** work provides a practical strategy for achieving excellent electrical contact between bulk metals and 2D semiconductors,paving the way for future large-scale 2D electronic devices.

关键词： Edge contact 2D materials Field-effect transistors Schottky barrier Contact resistance

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Electrical transport and optical properties of Cd3As2 thin films

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Chinese Physics B 2019年第10期28卷 93-100页

作者： Yun-Kun Yang Fa-Xian Xiu Feng-Qiu Wang Jun Wang Yi Shi Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China State Key Laboratory of Surface Physics and Department of Physics Fudan UniversityShanghai 200433China School of Electronic Science and Engineering Nanjing UniversityNanjing 210093China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210093China

Cd3As2, as a three-dimensional(3D) topological Dirac semimetal, has attracted wide attention due to its unique physical properties originating from the 3D massless Dirac fermions. While many efforts have been devoted to the exploration of novel physical phenomena such as chiral anomaly and phase transitions by using bulk crystals, the development of high-quality and large-scale thin films becomes necessary for practical electronic and optical applications. Here, we report our recent progress in developing single-crystalline thin films with improved quality and their optical devices including Cd3As2-based heterojunctions and ultrafast optical switches. We find that a post-annealing process can significantly enhance the crystallinity of Cd3As2 in both intrinsic and Zn-doped thin films. With excellent characteristics of high mobility and linear band dispersion, Cd3As2 exhibits a good optical response in the visible-to-mid-infrared range due to an advantageous optical absorption, which is reminiscent of 3D graphene. It also behaves as an excellent saturable absorber in the mid-infrared regime. Through the delicate doping process in this material system, it may further open up the long-sought parameter space crucial for the development of compact and high-performance mid-infrared ultrafast sources.

关键词： topological Dirac semimetals thin films photodetectors ultra-fast optical switches

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Secondary crystallization strategy for highly efficient inorganic CsPbI_(2)Br perovskite solar cells with efficiency approaching 17%

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Journal of Energy Chemistry 2021年第12期30卷 558-565,I0013页

作者： Jing Ma Zhenhua Lin Xing Guo Long Zhou Jian He Zhou Yang Jincheng Zhang Yue Hao Shengzhong Liu Jingjing Chang State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology Shaanxi Joint Key Laboratory of GrapheneSchool of MicroelectronicsXidian University2 South Taibai RoadXi’an 710071ShaanxiChina Advanced Interdisciplinary Research Center for Flexible Electronics Xidian University2 South Taibai RoadXi’an 710071ShaanxiChina Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of Education Shaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina

Inorganic CsPbI_(2) Br perovskite solar cells(PSCs) have a tremendous development in last few years due to the trade-off between the excellent optoelectronic properties and the relatively outstanding ***,we demonstrated a strategy of secondary crystallization(SC) for CsPbI_(2) Br film in a facile planar n-i-p structure(ITO/ZnO-SnO_(2)/CsPbI_(2) Br/Spiro-OMeTAD/Ag) at low-temperature(150℃).It is achieved through the method of post-treatment with guanidinium bromine(GABr) atop annealed CsPbI_(2) Br *** was found that the secondary crystallization by GABr can not only regulate the crystal growth and passivate defects,but also serve as a charge collection center to effectively collect photogenerated *** addition,due to the excess Br ions in GABr,the formation of the Br-rich region at the CsPbI_(2) Br perovskite surface can further lower the Fermi level,leading to more beneficial band alignment between the perovskite and the hole transport layer(HTL),while the phase stability was also *** a result,the champion cell shows a superb open-circuit voltage(V_(oc)) of 1.31 V,a satisfactory power conversion efficiency(PCE) of 16.97% and outstanding *** far as we know,this should be one of the highest PCEs reported among all-inorganic CsPbI_(2) Br based PSCs.

关键词： CsPbI_(2)Br Low temperature Secondary crystallization High performance

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Multicomponent high-entropy rare earth hexaaluminate thermal barrier coating with prolonged thermal cycling performance

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surface and Coatings technology 2025年 511卷

作者： Jieyan Yuan Hanying Hu Hao Zhang Chuncheng Wei Shuang Li Xiangrong Lu School of Materials Science and Engineering Shandong University of Technology Zibo 255000 People's Republic of China Jiangxi Provincial Key Laboratory of Surface Engineering School of Materials and Energy Jiangxi Science and Technology Normal University Nanchang 330013 People's Republic of China School of Resources and Environmental Engineering Shandong University of Technology Zibo 255000 People's Republic of China Sinoma Advanced Nitride Ceramics Co. LTD Zibo 255035 People's Republic of China

With the increasing inlet temperature of gas turbine engines, the development of thermal barrier coatings (TBCs) present significant challenges. In present work, a novel high-entropy (La 0.2 Nd 0.2 Sm 0.2 Eu 0.2 Gd 0.2 )MgAl 11 O 19 (HE-RMA) coating was developed by air plasma spraying for its excellent comprehensive performance. Compared to LaMgAl 11 O 19 coating under identical spraying conditions, it is observed that HE-RMA coating exhibits a denser structure and a greater proportion of amorphous phase, which is attributable to its higher melting degree. The evolutionary trend of microstructure as well as thermal and mechanical properties of plasma-sprayed HE-RMA coating after thermal aging were investigated. It reveals that thermal-aged HE-RMA coating exhibits lower thermal conductivity, greater structural integrity and better mechanical properties than single-component LaMgAl 11 O 19 coating. In thermal cyclic fatigue test, HE-RMA coating undertakes a longer thermal cycling lifetime than its single-component counterpart. These preliminary results suggest that high-entropy design could tailor MgO-doped rare-earth hexaluminates with superior multi-functional properties and enable significant improvement in cycling performance.

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Anti-solvent engineering for efficient semitransparent CH3NH3PbBr3 perovskite solar cells for greenhouse applications

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Journal of Energy Chemistry 2019年第7期28卷 12-19页

作者： Waqas Siddique Subhani Kai Wang Minyong Du Xiuli Wang Ningyi Yuan Jianning Ding Shengzhong(Frank)Liu Dalian National Laboratory for Clean Energy iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of the Chinese Academy of Sciences Beijing 100039China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710119ShaanxiChina Jiangsu Key Laboratory for Photovoltaic Engineering and Science Changzhou UniversityChangzhou 213164.Jiangsu.China

With ideal combination of benefits that selectively converts high photon energy spectrum into electricity while transmitting low energy photo ns for photos yn thesis,the CH3NH3PbBr3 perovskite solar cell(BPSC)is a promising candidate for efficient greenhouse based building integrated photovoltaic(BIPV)***,the efficiency of BPSCs is still much lower than their theoretical *** general,interface band alignment is regarded as the vital factor of the BPSCs whereas only few reports on enhancing perovskite film *** this work,highly efficient BPSCs were fabricated by improving the crystallization process of CH3NH3PbBr3 with the assistance of anti-solvents.A new anti-solvent of diphenyl ether(DPE)was developed for its strong interaction with the solvents in the perovskite precursor *** using the anti-solvent of DPE,trap-state density of the CH3NH3PbBr3 film is reduced and the electron lifetime is enhanced along with the large-grain crystals compared with the samples from conventional anti-solvent of *** preliminary optimization,the efficiencies of typical and semitransparent BPSCs are improved to as high as 9.54%and 7.51%,*** absorption measurement demonstrates that the cell without metal electrode shows 80%transparency in the wavelength range of 550-1000 nm that is perfect for greenhouse *** that the cell absorbs light in the blue spectrum before 550 nm,it offers very high solar cell efficiency with only 17.8%of total photons,while over 60%of total photons can transm让through for photosynthesis if a transparent electrode can be obtained such as indium doped SnO2.

关键词： CH3NH3PbBr3 Semitransparent perovskite solar cell Anti-solvent Greenhouse

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Introducing Spin Polarization into Mixed-Dimensional Van der Waals Heterostructures for High-Efficiency Visible-Light Photocatalysis

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Energy & Environmental Materials 2023年第5期6卷 192-200页

作者： Yong Wang Wei Xu Yu Zhang Chengxin Zeng Weining Zhang Lin Fu Mei Sun Yizhang Wu Jian Hao Wei Zhong Youwei Du Rusen Yang Academy of Advanced Interdisciplinary Research School of Advanced Materials and NanotechnologyXidian UniversityXi'an 710126China National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures and Jiangsu Provincial Key Laboratory for NanotechnologyNanjing UniversityNanjing 210093China Department of Physics Shaanxi University of Science and TechnologyXi'an 710021China Department of Physics State Key Laboratory of Surface PhysicsFudan UniversityShanghai 200433China State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering Ningxia UniversityYinchuan 750021China

The low separation efficiency of the photogenerated carrier and the poor activity of the surface redox reaction are the main barrier to further improvement of photocatalytic *** address these issues,introducing spin-polarized electrons in single-component photocatalytic materials emerged as a promising ***,the decreased redox ability of photocarriers in these materials becomes a new ***,we mitigate this challenge with a carbon nitride sheet(CNs)/graphene nanoribbon(GNR)composite material that has a van der Waals heterostructures(vdWHs)and spin-polarized electron *** results and theoretical calculations show that the heterostructure has a strong redox ability,high carrier-separation efficiency,and enhanced surface catalytic ***,the mixed-dimensional CNs/GNR vdWHs exhibit remarkable performance for H_(2)and O_(2)generation as well as CO_(2)production under visible-light irradiation without any *** spin-polarized vdWHs discovered in this study revealed a new type of photocatalytic materials and advanced the development of spintronics and photocatalysis.

关键词： DFT calculations spin polarization Van der Waals heterostructures visible-light photocatalysis

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Union of Perovskite and Silicon: Overcoming Electrical Losses for Surpassing Shockley–Queisser Limit

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advanced Energy Materials 2025年

作者： Li, Jianxun Wang, Kai Liu, Jieqiong Ye, Yihan Liu, Shengzhong State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Liaoning Dalian116023 China Center of Materials Science and Optoelectronics Engineering University of the Chinese Academy of Sciences Beijing100039 China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an710119 China CNNP Optoelectronics Technology 2828 Canghai Road Lingang Shanghai100089 China

Perovskite/silicon tandem solar cells (TSCs) have emerged as a highly promising technology for achieving exceptional power conversion efficiencies by leveraging the complementary light absorption properties of perovskite and silicon materials. However, electrical losses—originating from suboptimal perovskite film quality, pronounced nonradiative recombination at contact interfaces, and charge transport inefficiencies in interconnecting layers (ICLs)—remain significant obstacles to reaching theoretical efficiency limits. This review systematically investigates the primary sources of electrical losses in perovskite/silicon TSCs and offers a comprehensive analysis of recent advancements in mitigating these losses, including enhancements in perovskite film quality, reductions in interfacial recombination, and optimizations of ICL performance. Special focus is placed on strategies aimed at minimizing electrical losses in perovskite/perovskite/silicon triple-junction TSCs. The review concludes by outlining future research directions, emphasizing the critical role of ongoing innovation in material design, interfacial engineering, and device architecture to fully unlock the potential of perovskite/silicon TSCs. © 2025 Wiley-VCH GmbH.

关键词： Wide band gap semiconductors

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Chlorine-modified SnO2 electron transport layer for high-efficiency perovskite solar cells

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InfoMat 2020年第2期2卷 401-408页

作者： Xiaodong Ren Yucheng Liu Dong Geon Lee Won Bin Kim Gill Sang Han Hyun Suk Jung 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'an710119China School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySuwonKorea Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023ChinaUniversity of the Chinese Academy of SciencesBeijing100039China

A high-quality electron transport layer(ETL)is a critical component for the realization of high-efficiency perovskite solar *** developed a controllable direct-contact reaction process to prepare a chlorinated SnO2(SnO2-Cl)*** is unique in that(a)102-dichlorobenzene is used to provide more reactive Cl radicals for more in-depth passivation;(b)it does not introduce any impurities other than *** is found that the chlorine modification significantly improves the electron ***,its associated solar cell efficiency is increased from 17.01%to 17.81%comparing to the pristine SnO2 ETL without the *** hysteresis index is significantly reduced to 0.017 for the SnO2-Cl ETL.

关键词： chlorine-modified SnO2 electron transport layer perovskite solar cell surface passivation

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Post-illumination activity of Bi_(2)WO_(6) in the dark from the photocatalytic“memory”effect

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Journal of advanced Ceramics 2021年第2期10卷 355-367页

作者： Weiyi Yang Yan Chen Shuang Gao Licheng Sang Ruoge Tao Caixia Sun Jian Ku Shang Qi Li School of Materials Science and Engineering Southwest Jiaotong UniversityChengdu610031China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Northeast Yucai School Shenyang110179China Key Laboratory of New Metallic Functional Materials and Advanced Surface Engineering in Universities of Shandong and School of Mechanical and Electronic Engineering Qingdao Binhai UniversityQingdao266555China

Photocatalysts with the photocatalytic"memory"effect could resolve the intrinsic activity loss of traditional photocatalysts when the light illumination is turned *** to the dual requirements of light absorption and energy storage/release functions,most previously reported photocatalysts with the photocatalytic"memory"effect were composite photocatalysts of two phase components,which may lose their performance due to gradually deteriorated interface conditions during their *** this work,a simple solvothermal process was developed to synthesize Bi2WO6 microspheres constructed by aggregated *** pure phase Bi_(2)WO_(6) was found to possess the photocatalytic"memory"effect through the trapping and release of photogenerated electrons by the reversible chemical state change of W component in the(WO_(4))^(2–)*** the illumination was switched off,Bi_(2)WO_(6) microspheres continuously produced H_(2)O_(2) in the dark as those trapped photogenerated electrons were gradually released to react with O_(2) through the two-electron O_(2) reduction process,resulting in the continuous disinfection of Escherichia coli bacteria in the dark through the photocatalytic"memory"*** deterioration of their cycling H2O2 production performance in the dark was observed,which verified their stable photocatalytic"memory"effect.

关键词： Bi_(2)WO_(6) photocatalytic"memory"effect energy storage/release activity in the dark stability

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