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Unveiling the top-down crystallization mechanism: Balancing diffusion and crystallization in vapor–solid reactions for efficient perovskite solar cells

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Journal of Energy Chemistry 2025年 108卷 263-271页

作者： Duan, Changyu Hu, Shenghan Dou, Yichen Deng, Xinyu Jiang, Xiongzhuang Peng, Yong Liang, Guijie Cheng, Yi-Bing Ku, Zhiliang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China Hubei Key Laboratory of Low Dimensional Optoelectronic Material and Devices Hubei University of Arts and Science Hubei Xiangyang441053 China Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Guangdong Foshan528200 China

Vapor deposition is a promising technique for industrializing perovskite solar cells, but limited understanding of crystallization mechanisms in vapor-phase processes hampers progress. This study reveals a top-down crystallization growth mechanism during a two-step vapor–solid reaction and introduces an accelerated diffusion-buried homogeneous seed (AD-BHS) strategy. By utilizing the rapid diffusion of methylammonium chloride and inducing crystallization with buried seeds, we eliminate residual lead iodide, reduce crystallization time disparities across the film, and enhance uniformity. As a result, we achieve efficiencies of 22.40% for small-area (0.148 cm2) cells and 19.75% for large-area (10.0 cm2) modules, both representing state-of-the-art performance for vapor–solid reaction-based perovskite solar cells. This study provides critical insights into regulating crystallization growth in vapor-deposited perovskite thin films. © 2025 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences

关键词： Plasma CVD

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Enhance the mechanical properties of CoCrFeNi(TiC)0.2 eutectic high-entropy alloy through carbide precipitation and partial recrystallization

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materials Science and Engineering: A 2025年 937卷

作者： Zhang, Jian Chen, Xiaohong Xiang, Wei Zhou, Zhiqiang Wei, Qinqin Xie, Pan Luo, Guoqiang Shen, Qiang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei Longzhong Laboratory Hubei Xiangyang441000 China School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Innovation Institute for Ocean Materials Characterization Technology State Key Lab of Tropic Ocean Engineering Materials and Materials Evaluation Hainan University Hainan Province Haikou570228 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China

The CoCrFeNi based alloys with high outstanding fracture toughness and thermal stability demonstrates significant potential for aerospace structural frameworks. However, the as-cast TiC enhanced CoCrFeNi alloy exhibits a poor yield strength, limiting its practical application as a structural material. This study proposes a thermomechanical treatment strategy to enhance the CoCrFeNi(TiC)0.2 alloy by utilizing carbide precipitates and partial recrystallization. The carbide precipitates, unrecovered dislocations, refined recrystallize grains, and twins simultaneously enhance the alloy through precipitation strengthening, dislocation strengthening, and grain boundary strengthening. After cold rolling and heat treating at 900 °C, the CoCrFeNi(TiC)0.2 alloy exhibits a high yield strength of 760 MPa, an ultimate tensile strength of 1100 MPa, and a uniform elongation of 14 %. The alloy demonstrates a relatively favorable strength-ductility balance, which is higher than that of reported carbide-reinforced CoCrFeNi alloys. The work offers theoretical guidance for preparing high-performance alloys, demonstrating significant potential for practical applications. © 2025 Elsevier B.V.

关键词： Tensile strength

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High-entropy alloy nanocrystals boosting photocatalytic hydrogen evolution coupled with selective oxidation of cinnamyl alcohol

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Chinese Journal of Catalysis 2025年第1期68卷 326-335页

作者： Xianglin Xiang Bei Cheng Bicheng Zhu Chuanjia Jiang Guijie Liang Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430078HubeiChina College of Environmental Science and Engineering Nankai UniversityTianjin 300350China Hubei Key Laboratory of Low Dimensional Arts and Science Hubei University of Arts and ScienceXiangyang 441053HubeiChina

Photocatalysis provides a promising solution to the worldwide shortages of energy and industrially important raw materials by utilizing sunlight for coupled hydrogen(H_(2))production with controllab.e organic ***,we demonstrate that PtFeNiCoCu high-entropy alloy(HEA)nanocrystals can act as efficient cocatalysts for H_(2)evolution coupled with selective oxidation of cinnamyl alcohol to cinnamaldehyde by cubic cadmium sulfide(CdS)quantum dots(QDs)with uniform sizes of 4.0±0.5 *** nanocrystals were prepared via a simple solvothermal approach,and were successfully integrated with CdS QDs by an electrostatic self-assembly method to construct HEA/CdS *** optimized HEA/CdS sample presented an enhanced photocatalytic H_(2)production rate of 7.15 mmol g^(-1)h^(-1),which was 13 times that of pure CdS ***,a cinnamyl alcohol conversion of 96.2%with cinnamaldehyde selectivity of 99.5%was achieved after photoreaction for 3 *** integration of HEA with CdS QDs extended the optical absorption edge from 475 to 484 *** d-band center analysis,Pt atoms in the HEA are the active sites for H_(2)evolution,exhibiting higher catalytic activity than pure ***,the band structure of the CdS QDs enables the oxidative transformation of cinnamyl alcohol to cinnamaldehyde with high ***,femtosecond transient absorption spectroscopy shows that HEA can significantly promote the separation of photogenerated carriers in CdS,which is vital for achieving enhanced photocatalytic *** work inspires atomic-level design of photocatalytic materials for coordinated production of green energy carriers and value-added products.

关键词： Artificial photosynthesis d-Band center Photocatalytic hydrogen evolution Quantum dots Value-added organic synthesis

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Triphenylphosphine oxide additive regulates the growth of perovskite films by evaporation-spraying technique for high-efficiency large-area solar cell modules

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Journal of Energy Chemistry 2025年 108卷 468-476页

作者： Mingwei Zhu Danlin Ruan Xin Zhao Jiawei Song Jiahao Cheng Wenjian Shen Wangnan Li Guijie Liang Ying Liang Yong Peng Bin Li Yi-Bing Cheng Hubei Longzhong Laboratory Wuhan University of Technology (Xiangyang Demonstration Zone) Xiangyang 441000 Hubei China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 Hubei China Machine X Technology Co. Ltd. Jiaxing 314211 Zhejiang China Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and Science Xiangyang 441053 Hubei China State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals Lanzhou University of Technology Lanzhou 730050 Gansu China

Premature perovskite films rapidly form at the FAI/PbI 2 interface, inhibiting further reactions between FAI and PbI 2 during the fabrication of perovskite films via the evaporating-spraying hybrid method according to our previous research. In this research, triphenylphosphine oxide (TPPO) was proved to be an effective coordinator that reduces the reaction rate between FAI and PbI 2 at the initial stage, which can be attributed to the hydrogen (H) bonds between FA + and TPPO, and coordinate bonds between TPPO and PbI 2 . Additionally, the quality of perovskite films improved significantly: the trap state density decreased from 1.6 × 10 18 to 3.17 × 10 17 cm −3 , while the crystal size increased from 740 to 940 nm. The champion perovskite device achieved a remarkable efficiency of 20.93% (0.09 cm 2 ) and 16.75% (63.7 cm 2 ), marking one of the highest reported results for the evaporating-spraying hybrid method. Moreover, the perovskite solar cells retained over 80% of their initial performances after 600 h of storage at 60 °C in a nitrogen environment without encapsulation. It also maintained approximately 90% of its initial performance after continuous illumination at 25 °C for 1400 h under the same conditions.

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Maximum Power Point Tracking Using a Multimode Hunter-Prey Optimization Algorithm for Gradually Varying Power in Centralized Thermoelectric Generation System

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Energy technology 2025年第0期

作者： Zhu, Wenchao Li, Peng Yang, Wenlong Xie, Changjun Li, Hao Yang, Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan430070 China School of Automation Wuhan University of Technology Wuhan430070 China Wuhan Industrial Technology Institute of Artificial Intelligence and New Energy Vehicles Wuhan430119 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China

The unstructured power outputs from thermoelectric generator (TEG) systems have precipitated the advancement of maximum power point tracking (MPPT) methods toward more intelligent solutions. This article concentrates on centralized TEG systems which work during nonuniform distribution of temperature cases and introduce the hunter-prey optimization algorithm with multimode updating (MMUHPO). Existing MPPT methods based on metaheuristic algorithms pay attention to improving tracking speed, efficiency, oscillation, and call frequency. However, in scenarios marked by gradual changes in power characteristics, the precision of MPPT algorithms can lead to frequent oscillatory searches and elevated computational demands. MMUHPO reduces power loss and simplifies algorithm complexity by improving the original mechanism and introducing termination mechanism and multimode update mechanism. Herein, the proposed algorithm is compared with several widely used MPPT algorithms based on metaheuristic algorithms under five different operating conditions. Remarkably, the MMUHPO algorithm demonstrates a substantial enhancement in energy collection efficiency, with the increase in efficiency reaching up to 109.8%. Finally, real-time data simulation experiments corroborate the exceptional tracking performance of the proposed algorithm. © 2025 Wiley-VCH GmbH.

关键词： Heuristic algorithms

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Large-scale manufacturing sulfide superionic conductor for advancing all-solid-state batteries

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Matter 2025年

作者： Wang, Shuo Lou, Chenjie Wu, Xinbin Lin, Jing Gautam, Ajay Li, Shenghao Huang, Jielei Cheng, Zhu Zhang, Shengnan Zhang, Xin Strauss, Florian Brezesinski, Torsten Luo, Guoqiang Tang, Mingxue Shen, Yang Lin, Yuanhua Nan, Ce-Wen Center of Smart Materials and Devices State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China Center for High Pressure Science and Technology Advanced Research Beijing100094 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China Kaiserstr. 12 Karlsruhe76131 Germany Department of Radiation Science and Technology Delft University of Technology JB Delft2629 Netherlands

Lithium argyrodites with high ionic conductivities are favorable solid electrolytes (SEs) for all-solid-state batteries (ASSBs). However, their low preparation efficiency and poor cycling performance hinder their large-scale applications. In this work, we demonstrate successful large-scale production (over 1 kg per batch for the first time) of Li5.5PS4.5Cl0.75Br0.75 (LPSCB) by fast dry mixing followed by annealing, which presents high room temperature ionic conductivities of 13 mS cm−1 for cold-pressed and 25 mS cm−1 for sintered pellets. Combining neutron powder diffraction and 6Li → 7Li tracer-exchange nuclear magnetic resonance (NMR) spectroscopy measurements, we show that intercage jumps frequently occur through the 48h-16e-48h pathway in LPSCB, promoting the overall lithium conduction. The assembled ASSBs using LPSCB and a LiNi0.83Co0.11Mn0.06O2 electrode can be cycled for over 2,500 cycles at a 0.5 C rate and 1,800 cycles at a 2 C rate without any capacity degradation. Our results will accelerate the commercialization of sulfide SE for ASSBs. © 2025 Elsevier Inc.

关键词： Neutron powder diffraction

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Simultaneous Enhancement of Electron and Phonon Transport Properties via Magnetism Phase Transition in FexCo2-xTiGe Heusler Alloy

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Small 2025年 e2500154页

作者： Li, Yongqiang Wang, Hanwen Cui, Wenjun Lin, Weixiao Sun, Yue Zhao, Wen Sang, Xiahan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Wuhan University of Technology Shenzhen Institute Shenzhen518000 China Nanostructure Research Center Wuhan University of Technology Wuhan430070 China Shandong Qingdao266580 China

Magnetism offers an additional degree of freedom to control the electron and phonon transport properties of thermoelectric materials through various thermoelectromagnetic effects. To better understand the interplay among spin, carriers, and phonons, it is important to design material systems with intrinsic magnetic and thermoelectric properties. Here, it is demonstrated that Fe doping of the full Heusler alloy Co2TiGe simultaneously enhances its magnetic and thermoelectric performance. Aberration-corrected scanning transmission electron microscopy (STEM) reveals that Fe atoms preferentially substitute for Co atoms within the Co2TiGe lattice, leading to increased saturation magnetization and a higher Curie temperature. This Fe substitution reduces the carrier concentration, enhancing the Seebeck coefficient and power factor, while also increasing magnetic scattering due to spin fluctuations during the ferromagnetic-paramagnetic phase transition. Furthermore, the thermal conductivity is significantly reduced by enhanced phonon scattering from secondary phases and point defects. Consequently, a maximum ZT value of 0.066 is achieved at 600 K for Fe0.4Co1.6TiGe, representing a 663% increase compared to the undoped Co2TiGe. © 2025 Wiley-VCH GmbH.

关键词： Saturation magnetization

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Solid-state stepwise temperature-programmable synthesis of bioinspired Fe-N-C oxygen reduction electrocatalyst featuring Fe-N_(5)configuration

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Nano Research 2025年第3期18卷 654-665页

作者： Wei Sang Somboon Chaemchuen Longyang Zhang Zechen Wang Xingchuan Li Cocoro Andrew Nagasaka Mo Xiong Naoki Ogiwara Cheng Chen Zhao Wang Jian Zhang Francis Verpoort Shichun Mu Zongkui Kou Tingting Wang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Basic Science School of Arts and SciencesThe University of TokyoKomabaMeguro-kuTokyo 153-8902Japan MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi’an Jiao tong UniversityXi’an 710049China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya 572000China Department of Chemical Engineering Faculty of EngineeringMahidol UniversityNakhon Pathom 73170Thailand School of Mathematical&Physical Sciences Wuhan Textile UniversityWuhan 430200China Joint Institute of Chemical Research(FFMiEN) Peoples Friendship University of Russia(RUDN University)6 Miklukho-Maklaya Str.117198 MoscowRussia National Research Tomsk Polytechnic University Lenin Avenue 30634050 TomskRussia Hubei Key Laboratory of Ferro &Piezo-electric Materials and DevicesFaculty of Physics and Electronic SciencesHubei UniversityWuhan 430062China School of Chemistry and Chemical Engineering Hainan UniversityHaikou 57022China

The bioinspired Fe-N-C features an asymmetric Fe-N_(5)configuration to produce active metal-oxygen intermediates by introducing axial N ligand into a symmetric Fe-N_(4) structure,enabling highly active oxygen reduction reaction(ORR).However,the artificial creation of active Fe-N_(5)configuration with a direct,facile and green method has been rarely developed yet,as current techniques involve complex processes and costly ***,we advance a novel solid-state stepwise temperature-programmable(SST)route to directly produce bioinspired Fe-N_(5)-*** then demonstrate that such a Fe-N_(5)-C exhibits a quite higher half-wave potential(0.92 V)with 22-fold faster ORR kinetics(15.6 mA·cm^(−2)@0.85 V)over that of the commercial Pt/C ***,we perform density functional theory(DFT)to find that the Fe is discharged with an extra 0.1 e^(−)through the axially coordinate N ligand,which significantly enhances the ability to activate O_(2) and enables an easier desorption of the crucial intermediate ^(*)OH on the Fe-N_(5)configuration over the conventional Fe-N_(4) structure.

关键词： single atom catalysts Fe-N_(5)coordination solvent-free synthesis oxygen reduction reaction(ORR) metal-air battery

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Introduction of the interfacial layer between filler and matrix: An effective approach towards developing high thermal conductive dielectric composite

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Ceramics International 2025年

作者： Shen, Jie Chen, Xian Qi, Yu He, Wenhao Li, Qiangzhi Zhang, Jiayi Zhou, Jing Chen, Wen Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang441000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Sanya Science and Education Innovation Park Wuhan University of Technology Sanya572024 China

In the development of high-performance electronic devices, high thermal conductive dielectric composites are crucial. For PTFE-based dielectric composites, enhancing thermal conductivity while maintaining low dielectric properties remains a challenge. The key issue lies in the high interfacial thermal resistance between fillers and the PTFE matrix, which restricts the improvement of thermal conductivity. This paper focuses on introducing an interfacial layer between the filler and the matrix as an effective approach. By constructing a SiO2 interfacial layer between hBN and PTFE, we formed hBN@SiO2 core-shell structured fillers and then prepared hBN@SiO2/PTFE composites. This method significantly reduces the interfacial thermal resistance. Consequently, the thermal conductivity of the composite reaches 1.40 W/(m·K), the coefficient of thermal expansion decreases, and it still keeps a low dielectric constant of 3.9 and low dielectric loss of 1 × 10−4. This study provides an innovative and effective way for the development of high thermal conductive dielectric composites, which is of great significance for high-power and high-frequency applications. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Dielectric losses

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Tristate ferroelectric memory in PZT-based films from antiferroelectric-ferroelectric phase transition

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Ceramics International 2025年

作者： Liu, Yifei Hu, Yang Zhang, Huazhang Wang, Zhiqing Shen, Jie Wu, Zhi Chen, Wen Zhou, Jing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Sanya Science and Education Innovation Park Wuhan University of Technology Hainan 572000 China School of Physics and Mechanics Wuhan University of Technology Wuhan430070 China School of Materials and Engineering Hunan Institute of Technology Hengyang421002 China

Ferroelectric random access memory (FeRAM) plays a vital role in information storage due to its unique advantages, driving the demand for high-capacity and high-density solutions. In this paper, a series of PbZr1-xTixO3 (x = 6 %, 8 %, 10 %, 12 %, 14 %) films were prepared using sol-gel and spin-coating methods. As the Ti content increases, the enhancement effect of the ferroelectric order is reflected structurally in XRD and Raman spectra, and electrically in the dielectric and ferroelectric properties. Notably, for x = 12 %, the P-E hysteresis loop exhibits slightly pinched and double-like, and the peaks of the I-V curve are split on both the positive and negative field sides. This ferroelectric behavior is caused by an underlying triple-well free-energy landscape, which is the basis of tristate ferroelectric memory. The measurement results show that the "±1" and "0" states of PbZr0.88Ti0.12O3 film under electric field cycling exhibit excellent programmability. It also achieves promising data retention up to 1000s and endurance up to 107 cycles. This investigation not only verifies the feasibility of applying tristate ferroelectric memory to PZT-based films but also provides a facile method for fabricating tristate ferroelectric memory devices. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Tristate ferroelectric memory Antiferroelectric Ferroelectric Phase transition PZT

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