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Surface passivation and hole extraction:Bifunctional interfacial engineering toward high-performance all-inorganic CsPbIBr2 perovskite solar cells with efficiency exceeding 12%

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Journal of Energy Chemistry 2022年第11期31卷 387-393,I0011页

作者： Qi Liu Junming Qiu Xianchang Yan Yuemeng Fei Yue Qiang Qingyan Chang Yi Wei Xiaoliang Zhang Wenming Tian Shengye Jin Ze Yu Licheng Sun State Key Laboratory of Fine Chemicals Dalian University of Technology(DUT)Dalian 116024LiaoningChina School of Materials Science and Engineering Beihang UniversityBeijing 100191China 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 Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)Dalian University of Technology(DUT)Dalian 116024LiaoningChina Center of Artificial Photosynthesis for Solar Fuels School of ScienceWestlake UniversityHangzhou 310024ZhejiangChina Department of Chemistry School of Engineering Sciences in ChemistryBiotechnology and HealthKTH Royal Institute of Technology10044 StockholmSweden

All-inorganic CsPbIBr2perovskite solar cells(PSCs)have attracted considerable research attention in recent years due to their excellent thermal ***,their power conversion efficiencies(PCEs)are relatively low and still far below the theoretical ***,we report the use of an organic dye molecule(namely VG1-C8)as a bifunctional interlayer between perovskite and the hole-transport layer in *** experimental and theoretical calculation results disclose that the multiple Lewis base sites in VG1-C8 can effectively passivate the trap states on the perovskite ***,theπ-conjugated dye molecule significantly accelerates the hole extraction from the perovskite absorber as evidenced by the photoluminescence ***,the VG1-C8 treatment simultaneously boosts the photovoltage and photocurrent density values from 1.26 V and 10.80 mA cm^(-2) to 1.31 V and 12.44 m A cm^(-2),*** leads to a significant enhancement of PCE from 9.20%to12.10%under one sun irradiation(AM 1.5G).To our knowledge,this is the record efficiency reported so far for CsPbIBr_(2) ***,the present work demonstrates an effective interfacial passivation strategy for the development of highly efficient PSCs.

关键词： All-inorganic perovskite solar cells CsPbIBr2 Defect passivation Hole extraction High efficiency

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Research and Clinical Application of Mechanical Properties of Arterial Vasculature 25

Research and Clinical Application of Mechanical Properties o...

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Proceedings of the 2025 International Conference on Health Big Data

作者： Liuchuang Wei Heming Cheng Suihai Chen Yumin Song Department of Mechanics Kunming University of Science and Technology Kunming Yunnan China Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device School of Chemistry and Chemical Engineering Kunming University Kunming Yunnan China

ISBN: (纸本)9798400713446

Arterial blood vessels biomechanical properties are critical for cardiovascular health, as alterations in arterial structure are closely associated with pathological states. Through histological examination of the arterial wall architecture, and large-scale mechanical testing data attendance, this study analyses how vascular compliance and elasticity are affected by atherosclerotic plaque formation. By conducting uniaxial tensile tests and computational modeling analyses, we determined how well these methods are able to describe pathological remodeling, missing that neither captures in vivo dynamic mechanical loading conditions particularly well. Besides, the mechanical properties of the artery have practical significance in clinical use, such as stent implantation and artificial vessel design. Future studies should concentrate on multiscale modeling, patient-specific models, and new technologies to obtain data with higher physiological fidelity and relevance to clinical applications.

关键词： Arterial vasculature

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Synergistic Effect of Bi and Fe for Suppressing Hydrogen Evolution Reaction (Her) and Enhancing Electrochemical Nitrogen Reduction Reaction (Enrr) Performance

SSRN

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SSRN 2024年

作者： Guo, Wenhua Chen, Huili Li, Siming Li, Si-Dian Shao, Zongping Li, Yawei Institute of Molecular Science Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province Shanxi University Taiyuan030006 China School of Chemistry and Chemical Engineering Shanxi University Taiyuan030006 China Department of Chemical Engineering Curtin University Perth Australia Shanxi University China

The electrochemical nitrogen reduction reaction (eNRR) shows great promise for synthesizing ammonia. However, eNRR electrocatalysts with high catalytic activity and selectivity still need to be developed. In this work, a Bi-doped La0.9Bi0.1FeO3-δ (LBiF) perovskite was prepared as a potential cathode catalyst and incorporated in a protonic ceramic electrolysis cell (PCEC) for eNRR. Electrochemical tests demonstrated that the LBiF cathode shows higher eNRR catalytic activity and improved hydrogen evolution reaction (HER) inhibition compared to undoped LaFeO3 (LF). Characterizing the used LBiF cathode after 90 h of NH3 synthesis confirmed that the electronic structure of the catalyst surface is reconstructed during the eNRR process. Specifically, Bi3+ is partially reduced to Bi2+ and metallic Bi, resulting in A-site defects and a higher concentration of oxygen vacancies (OVs) and Fe4+ due to the charge neutrality principle. Both the OVs and Fe4+ can accept electron pairs provided by N2 due to their unsaturated electronic structures. More importantly, Bi doping suppresses the HER because the Bi tends to bind to N rather than H. Furthermore, Bi doping creates new Bi3+/Bi2+/Bi0 redox electron pairs, establishing an electron transfer path that improves perovskite conductivity and eNRR electrocatalytic activity. This study provides a benchmark for the design of eNRR catalysts to inhibit the HER. © 2024, The Authors. All rights reserved.

关键词： Iron compounds

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Recent advances in highly integrated energy conversion and storage system

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SusMat 2022年第2期2卷 142-160页

作者： Changxiang Shao Yang Zhao Liangti Qu School of Chemistry and Pharmaceutical Engineering Shandong First Medical University&Shandong Academy of Medical SciencesTaianShandongP.-R.China Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Key Laboratory of Cluster ScienceMinistry of Education of ChinaSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijingP.R.China Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijingP.R.China

The vigorous development in the field of energy conversion and storage devices directly contributes to the full utilization and convenient use of clean ***,some drawbacks of independent energy conversion and storage devices,including unstable,insufficient energy output and dependence on external power supply,are difficult to overcome by self-optimization,thus,hindering their further development and direct ***,the combination of above two devices can solve these problems,which conforms to their intrinsic needs for *** the same time,the pursuit of portability and miniaturization also promotes the development of the power system toward a highly integrated ***,we introduce several integration modes of energy conversion and storage systems,with emphasis on all-in-one power system,possessing the highest integration in this *** the aspect of device configuration,working mechanisms and their performances,the all-inone power systems based on different energy sources(e.g.,mechanical,solar,thermal,and chemical energy)are discussed and ***,the design strategies are summarized and the potential development directions in the future are *** review aims to provide a comprehensive overview of highly integrated energy conversion and storage system,and seeks to point out the opportunities and orientations of future research in this field.

关键词： all-in-one energy conversion energy storage high integration power system

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Development of flexible Li-ion batteries for flexible electronics

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InfoMat 2020年第5期2卷 866-878页

作者： Yifan Zhao Juchen Guo Materials Science and Engineering Program University of California–RiversideRiversideCalifornia Department of Chemical and Environmental Engineering University of California–RiversideRiversideCalifornia

We provide a critical review on the recent development of flexible lithium-ion batteries(FLIBs)for flexible electronic *** innovative designs of cell configuration for bendable and stretchable FLIBs,selection of active materials,and evaluation methods for FLIBs are *** grand challenges for FLIBs are energy density and scale-up fabrication as demonstrated in the ***,the lack of quantitative evaluation methods for FLIBs'performance and nondestructive tools to probe the mechanical degradation may significantly hinder the development of FLIB *** for future research directions,based on the current state of progress,are discussed.

关键词： flexible electronic devices flexible Li-ion batteries nondestructive probe

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Structural evaluation of Poly(lactic acid) degradation at standardized composting temperature of 58 degrees

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Chemosphere 2024年 354卷 141729页

作者： Oh, Jiwon Park, Sung Bae Cha, Chaenyung Hwang, Dong Ki Park, Seul-A Park, Jeyoung Oh, Dongyeop X. Jeon, Hyeonyeol Koo, Jun Mo Ulsan44429 Korea Republic of Ulsan44919 Korea Republic of Pohang37673 Korea Republic of Department of Chemical and Biomolecular Engineering Sogang University Seoul04107 Korea Republic of Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering Inha University Incheon22212 Korea Republic of Daejeon34113 Korea Republic of Department of Organic Materials Engineering Chungnam National University Daejeon34134 Korea Republic of

The accumulation of petroleum-based plastics on our planet is causing serious environmental pollution. Biodegradable plastics, promoted as eco-friendly solutions, hold the potential to address this issue. However, their impact on the environment and the mechanisms of their natural degradation remain inadequately understood. Furthermore, the specific conditions set forth in international standards for evaluating the biodegradability of biodegradable plastics have led to misconceptions about their real-world behavior. To properly elucidate the relationship between their degradability and structure, this study mimics the thermal effect on poly(lactic acid) (PLA) under standardized composting temperature. The higher the crystallinity of PLA, the lower the degradation rate, which suggests that crystallinity is a key factor in determining degradation. The composting temperature of 58 °C induces crystallization by having a structural effect on the polymer, which in turn reduces the degradation rate of PLA. Therefore, control over temperature and crystallization during the processing and degradation of PLA is crucial, as it not only determines the biodegradability but also enhances the utility. © 2024

关键词： Biodegradability

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Hydrogen selenide,a vital metabolite of sodium selenite,uncouples the sulfilimine bond and promotes the reversal of liver fibrosis

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science China(Life sciences) 2021年第3期64卷 443-451页

作者： Dongrui Luan Zengteng Zhao Dandan Xia Qiuling Zheng Xiaonan Gao Kehua Xu Bo Tang College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of ShandongKey Laboratory of Molecular and Nano ProbesMinistry of EducationInstitute of Molecular and Nano ScienceShandong Normal UniversityJinan 250014China Department of Pharmaceutical Analysis School of PharmacyState Key Laboratory of Natural MedicinesChina Pharmaceutical UniversityNanjing 210009China

Sodium selenite has alleviating effects on liver fibrosis;however,its therapeutic molecular mechanism remains ***,hydrogen selenide,a major metabolite of Na_(2)SeO_(3),was tested to uncouple the sulfilimine bond in collagen IV,the biomarker of liver fibrosis.A mouse model of liver fibrosis was constructed via a CCl_(4)-induced method,followed by the administration of 0.2 mg kg−1 Na_(2)SeO_(3)via gavage three times per week for 4 *** in H2Se,NADPH,and H_(2)O_(2)levels were monitored in real time by using NIR-H2Se,DCI-MQ-NADPH,and H_(2)O_(2)probes in vivo,respectively.H_(2)Se continuously accumulated in the liver throughout the Na_(2)SeO_(3)treatment period,but the levels of NADPH and H_(2)O_(2)*** expression of collagen IV was analyzed through Western blot and liquid chromatography-mass *** confirmed that the sulfilimine bond of collagen IV in the fibrotic mouse livers could be broken by H2Se with the Na_(2)SeO_(3)***,the therapeutic effect of Na_(2)SeO_(3)on liver fibrosis could be mainly attributed to H_(2)Se that uncoupled the sulfilimine bond to induce collagen IV *** study provided a reasonable explanation for the molecular mechanism of the in vivo function of Na_(2)SeO_(3)and the prevention of liver fibrosis by administering inorganic selenium.

关键词： hydrogen selenide sodium selenite sulfilimine bond liver fibrosis reversal collagen IV

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Machine Learning for Identifying Grain Boundaries in Scanning Electron Microscopy (SEM) Images of Nanoparticle Superlattices

arXiv

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arXiv 2025年

作者： Paruchuri, Aanish Thrasher, Carl Hart, A.J. Macfarlane, Robert Jayaraman, Arthi Science in Data Science Program University of Delaware NewarkDE19713 United States Department of Materials Science and Engineering Massachusetts Institute of Technology CambridgeMA02139 United States Department of Mechanical Engineering Massachusetts Institute of Technology CambridgeMA02139 United States Department of Chemical and Biomolecular Engineering University of Delaware 150 Academy St NewarkDE19713 United States Department of Materials Science and Engineering University of Delaware NewarkDE19713 United States Data Science Institute University of Delaware NewarkDE19713 United States

Nanoparticle superlattices consisting of ordered arrangements of nanoparticles exhibit unique optical, magnetic, and electronic properties arising from nanoparticle characteristics as well as their collective behaviors. Understanding how processing conditions influence the nanoscale arrangement and microstructure is critical for engineering materials with desired macroscopic properties. Microstructural features such as grain boundaries, lattice defects, and pores significantly affect these properties but are challenging to quantify using traditional manual analyses as they are labor-intensive and prone to errors. In this work, we present a machine learning workflow for automating grain segmentation in scanning electron microscopy (SEM) images of nanoparticle superlattices. This workflow integrates signal processing techniques, such as Radon transforms, with unsupervised learning methods like agglomerative hierarchical clustering to identify and segment grains without requiring manually annotated data. In the workflow we transform the raw pixel data into explainable numerical representation of superlattice orientations for clustering. Benchmarking results demonstrate the workflow's robustness against noisy images and edge cases, with a processing speed of four images per minute on standard computational hardware. This efficiency makes the workflow scalable to large datasets and makes it a valuable tool for integrating data-driven models into decision-making processes for material design and analysis. For example, one can use this workflow to quantify grain size distributions at varying processing conditions like temperature and pressure and using that knowledge adjust processing conditions to achieve desired superlattice orientations and grain sizes. © 2025, CC BY.

关键词： Grain boundaries

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Enhancing Zinc Electrode Stability Through Pre-Desolvation and Accelerated Charge Transfer via a Polyimide Interface for Zinc-Ion Batteries

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Small 2024年第35期20卷 e2401713页

作者： Lai, Chi-Yu Liao, Yin-Song Ku, Hao-Yu Jao, Wen-Yang Gull, Sanna Chen, Han-Yi Chou, Jyh-Pin Hu, Chi-Chang Department of Chemical Engineering National Tsing Hua University Hsinchu300044 Taiwan Tsing Hua Interdisciplinary Program National Tsing Hua University Hsinchu300044 Taiwan Department of Materials Science and Engineering National Tsing Hua University Hsinchu300044 Taiwan Department of Physics National Changhua University of Education Changhua50074 Taiwan

Aqueous zinc-based energy storage devices possess superior safety, cost-effectiveness, and high energy density;however, dendritic growth and side reactions on the zinc electrode curtail their widespread applications. In this study, these issues are mitigated by introducing a polyimide (PI) nanofabric interfacial layer onto the zinc substrate. Simulations reveal that the PI nanofabric promotes a pre-desolvation process, effectively desolvating hydrated zinc ions from Zn(H2O)62+ to Zn(H2O)42+ before approaching the zinc surface. The exposed zinc ion in Zn(H2O)42+ provides an accelerated charge transfer process and reduces the activation energy for zinc deposition from 40 to 21 kJ mol−1. The PI nanofabric also acts as a protective barrier, reducing side reactions at the electrode. As a result, the PI-Zn symmetric cell exhibits remarkable cycling stability over 1200 h, maintaining a dendrite-free morphology and minimal byproduct formation. Moreover, the cell exhibits high stability and low voltage hysteresis even under high current densities (20 mA cm−2, 10 mAh cm−2) thanks to the 3D porous structure of PI nanofabric. When integrated into full cells, the PI-Zn||AC hybrid zinc-ion capacitor and PI-Zn||MnVOH@SWCNT zinc-ion battery achieve impressive lifespans of 15000 and 600 cycles with outstanding capacitance retention. This approach paves a novel avenue for high-performance zinc metal electrodes. © 2024 Wiley-VCH GmbH.

关键词： Charge transfer

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Pulsing-Induced Healing of a Surface Crack of a Nickel-Based Alloy

SSRN

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SSRN 2024年

作者： Wang, Qian Quan, Mingming Tan, Zhen Liu, Ming Wang, Dianlong Yang, Xiao Liu, Ying Mao, Yaning Liang, Zhimin Yang, Fuqian Wang, Liwei School of Material Science and Engineering Hebei University of Science and Technology Shijiazhuang050018 China Hebei Key Laboratory of Material Near-Net Forming Technology Shijiazhuang050018 China School of Mechanical Engineering and Automation Fuzhou University Fuzhou350108 China HBIS Group Materials Institute HBIS Group Hebei Shijiazhuang050023 China Materials Program Department of Chemical and Materials Engineering University of Kentucky LexingtonKY40506 United States School of Material Science and Engineering Australia

In this work, we demonstrate the feasibility of applying electric pulses to heal surface cracks on Ni-based GH4169 alloy under compressive load. There exists an incubation time for the onset of the healing of a crack, which is associated with local temperature at the crack tip. The crack size decreases with increasing the pulsing time at a constant healing rate prior to complete healing of the crack. Increasing compressive load accelerates the healing process. The electric pulsing leads to the formation of an influential zone surrounding the crack with the finest grain sizes in the healed crack and the coarsest grain sizes away from the influential zone. The indentation hardness increases with the increase the distance to the crack tip of the healed crack. A model of viscous flow in the crack channel is proposed for the crack healing. The resultant force on the crack faces due to the crack healing increases with the increase of the healing time and the decrease of the crack width. © 2024, The Authors. All rights reserved.

关键词： Crack tips

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