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Perylene Diimide-Based A-D-A-Type Organic Additives for Efficient and Stable Inverted Perovskite Solar Cells

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SSRN 2025年

作者： Li, Shaojian Chen, Kai Li, Desheng Ling, Haiqian Duan, Weixu Lin, Zedong Liu, Cong Guo, Xiangwen Zhou, Liwei Wu, Fan Liu, Tao Zou, Bingsuo State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials School of Resources Environment and Materials Guangxi University Nanning530004 China School of Materials Science and Engineering Taizhou University Taizhou318000 China

Molecular dopant engineering is one of the most promising technologies for achieving high power conversion efficiency (PCE) in inverted perovskite solar cells (PSCs). Herein, we have successfully designed and synthesized two PDI-based n-type dopant small molecules, A-D-A-type PBDT and A-π-D-π-A-type PTBDT, respectively. Constructing D-A structures is an effective strategy for amplifying the actual built-in electric field, enhancing electron diffusion and dissociation. We systematically analyze the influence of dopants on the quality, internal charge extraction ability, passivation effect, and stability of perovskite thin films. With the addition of the PBDT dopant, the small-area solar cells achieve a high PCE of 25.94% with a voltage (VOC) of 1.18 V and a fill factor (FF) of 86.37%. Furthermore, the PBDT-treated PSCs also exhibit excellent stability. This result successfully fills the blank of using A-D-A-type molecular dopants for optimizing the electronic properties of bulk perovskite, and demonstrates a promising design strategy for developing novel dopants for efficient and stable PSCs. © 2025, The Authors. All rights reserved.

关键词： Cell engineering

Tea stain-inspired solar energy harvesting polyphenolic nanocoatings with tunable absorption spectra

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Nano Research 2021年第4期14卷 969-975页

作者： Lu Yang Yuan Zou Wei Xia Haotian Li Xinyu He Yi Zhou Xianhu Liu Chaoqun Zhang Yiwen Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou UniversityZhengzhou 450002China Key Laboratory for Biobased Materials and Energy of Ministry of Education College of Materials and EnergySouth China Agricultural University483 Wushan RoadGuangzhou 510642China Guangdong Laboratory for Lingnan Modem Agricultural Science and Technology 483 Wushan RoadGuangzhou 510642China

Discovery and development of new sustainable photothermal materials with tunable light absorption spectra play a key role in solar energy harvesting and *** possible solution to this quest is to check nature as a source of matters or *** by the formation of tea stains,a unique class of dark stain materials generated by the interfacial reaction between tea polyphenols and metal substance,we reported the facile preparation and screening of a series of photothermal nanocoating layers via the metal ion(i.e.C u(ll)>Fe(lll),Ni(ll),Zn(ll))promoted in situ polymerization of typical phenolic moieties of tea polyphenols(i.e.,catechol and pyrogallol).It was found that those resulting metal-polyphenolic nanocoatings showed various promising features,such as high blackness and strong adhesion,excellent and tunable light absorption properties,good hydrophilicity and long-term *** further fabricated the photothermal composite devices by/n s/'fty formation of meta卜polyphenolic nanocoatings on pristine silks for solar desalination,which demonstrated promising durable evaporation behaviors with excellent evaporation rates and steam generation *** believe that this work could provide more opportunities towards new types of bio-inspired and sustainable photothermal nanomaterials for solar energy harvesting applications such as water desalination.

关键词： metal-polyphenolic nanocoating polymerization light absorption photothermal solar desalination

Additive manufacturing of a Co-Cr-W alloy by selective laser melting:In-situ oxidation,precipitation and the corresponding strengthening effects

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Journal of materials Science & technology 2022年第30期125卷 171-181页

作者： Kefeng Li Zhi Wang Kaikai Song Khashayar Khanlari Xu-Sheng Yang Qi Shi Xin Liu Xinhua Mao Institute of New Materials Guangdong Academy of SciencesGuangzhou 510650China National Engineering Research Center of Powder Metallurgy of Titanium and Rare Metals Guangzhou 510650China Guangdong Key Laboratory for Advanced Metallic Materials Processing South China University of TechnologyGuangzhou 510641China School of Mechanical Electrical and Information EngineeringShandong UniversityWeihai 264209China Advanced Manufacturing Technology Research Center Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518000China

Additive manufacturing exhibits great potentials for the fabrication of novel materials due to its unique non-equilibrium solidification and heating *** this work,a novel nano-oxides dispersion strengthened Co28 Cr9 W1.5 Si(wt.%)alloy,fabricated by laser powder bed fusion(LPBF),was comprehensively *** the layer-by-layer featured process,in-situ formation of Si rich,amorphous,nano-oxide inclusions was observed,whose formation is ascribed to the high affinity of Si to ***,distinctive body-centered cubic(BCC)Co5 Cr3 Si2 nano-precipitates with an 8-fold symmetry were also confirmed to *** precipitates,rarely reported in previous studied Co-Cr alloys,were found to tightly bond with the in-situ ***,the morphologies,the size distributions as well as the microstructure of the interface between the matrix and the inclusions were investigated in detail and their influence on the tensile deformation was also *** existence of transition boundaries between these inclusions and the matrix strongly blocked the movement of dislocations,thereby increasing the strength of the *** was understood that when the plastic deformation proceeds,the fracture occurs in the vicinity of the oxide inclusions where dislocations accumulate.A quantitative analysis of the strengthening mechanism was also established,in which an additional important contribution to strength(~169 MPa)caused by the effects of in-situ formed oxide inclusions was calculated.

关键词： Co-Cr-W-Si alloy Selective laser melting Oxide inclusion Precipitation Strengthening mechanisms

Unravel the Anchoring Effect and Charge Changes of Li2sn on 2d-Tmd2 for Li-S Batteries: A Dft Study

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SSRN 2023年

作者： Zhao, Fenning Yang, Yutong Xue, Hongtao Tang, Fuling State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China

Two-dimensional transition metal disulfides (2D-TMDs) with a large specific surface area and stable layer structure, have been produced as catalysis, photonics, or other discipline materials. In this work, we investigated their strong polysulfide compatibility and new possible usage as Li-S batteries cathode materials. We explored the anchoring effect and charge changes of polysulfides (Li2Sn, n = 1, 2, 4, 6, 8, including S8) on 2D-TMDs (TM are Fe, Co, Cu, Zn, Ni, Pt, and Pd) matrix materials using first-principles calculations. The electrostatic potentials of 2D-TMDs indicated that they possess a plate structure with a positively charged core and negatively charged outer sides, which facilitates the adsorption of positively charged Li+. It was found that 2D-FeS2 is a special one, and it adsorbs Li2S stronger than other 2D-TMD2, with an adsorption energy of -4.28 eV and charge changes of 1.32 e. We also confirmed a significant linear relationship between the power of charge changes (Q) and the adsorption energy: E = 0.43 + 1.76 Q2.8 for 2D-FeS2 and E = 0.08 + 2.74 Q1.5 for other 2D-TMD2, respectively. And the correlation coefficient is larger than 0.90. These seven materials are expected to be viable cathode materials, providing a theoretical foundation for the usage of 2D-TMDs in Li-S batteries. © 2023, The Authors. All rights reserved.

关键词： Sulfur compounds

Non-trivial Topological Surface states Regulation of 1T-OsCoTe2 Enables Selective C―C Coupling for Highly Efficient Photochemical CO2 Reduction Toward C2+ hydrocarbons

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arXiv

arXiv 2024年

作者： Wang, Kangwang Wu, Mingjie Yu, Peifeng Garces, Hector F. Liang, Ying Li, Longfu Zeng, Lingyong Li, Kuan Zhang, Chao Yan, Kai Luo, Huixia School of Materials Science and Engineering State Key Laboratory of Optoelectronic Materials and Technologies Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Key Lab of Polymer Composite & Functional Materials Sun Yat-sen University Guangzhou510275 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China School of Engineering Brown University 182 Hope Street Providence United States The Basic Course Department Guangzhou Maritime University Guangzhou510800 China School of Environmental Science and Engineering Sun Yat-sen University Guangzhou510275 China

Despite ongoing research, the rational design of non-trivial topological semimetal surface states for the selective photocatalytic CO2 conversion into valuable products remains full of challenges. Herein, we present the synthesis of lattice-matched 1T-OsCoTe2 for the photoreduction upgrading of CO2 to tri-carbon (C2) alkane (propane, C2H2) by the integration of experimental work and theory prediction/calculation. Experimental studies suggested a high electron-based selectivity of 71.2% for C3H8 and an internal quantum efficiency of 54.6% at 380 nm. In-situ X-ray photoelectron spectroscopy and X-ray absorption fine structure spectroscopy demonstrated that Co and Os atoms coordinated with Te atoms enable an efficient Os―Te―Co electron transfer to activate the generation of *CH3, *CHOCO and *CH2OCOCO. Density functional theory calculations further confirmed Os―Te―Co electron bridging on the improved CO2 conversion kinetics. To our knowledge, this is the first report suggesting the role of Os atoms in accelerating the photocatalytic CO2 conversion activity of the topological semimetal 1T-OsCoTe2 Copyright © 2024, The Authors. All rights reserved.

关键词： Surface states

Enhanced Flexoelectric and Piezoelectric Pairing of Bent Pvdf Membrane with 2d Sns2-Biocl Heterojunction

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SSRN 2024年

作者： Li, Wen-Ming Zhang, Hui Dai, Chen-Min Miao, Jiao-Jiao Zhang, Peng-Fei Fan, Wei Song, Qing-Wen Chen, Pei Xia, Liang-Jun Xu, Wei-Lin Key Laboratory ofFunctionalTextile MaterialandProduct ofMinistry ofEducation School ofTextile Science andEngineering Xi'an Polytechnic University Xi’an710048 China Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Physical Science and Technology Suzhou University of Science and Technology Suzhou215009 China Interdisciplinary Research Center of Biology & Catalysis School of Life Sciences Northwestern PolytechnicalUniversity Xi'An710072 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

In this study, n-type SnS2 nanosheets and p-type BiOCl nanosheets prepared by hydrothermal method are utilized to construct the heterostructure SnS2-BiOCl composite through ultrasonication and grinding procedures. The piezoelectric SnS2-BiOCl heterojunction nanosheets are incorporated into the ferroelectric polyvinylidene fluoride (PVDF) membrane to fabricate the PVDF-SnS2-BiOCl flexoelectric strain sensor. The optimal amount of SnS2-BiOCl heterojunction in the PVDF-SnS2-BiOCl membrane is determined. A thorough analysis is conducted on the impact of bending curvature, frequency of bending, size and thickness of the membrane, water flapping, underwater bending, resistance to fatigue from repeated bending, and resistance to corrosions from acid and alkali on the membrane's output current and voltage. The experimental and density functional theory (DFT) calculation results indicate that the PVDF-SnS2-BiOCl(2:1)-10% membrane, functioning as a smart strain sensor, has the ability to monitor human joint movements and water fluctuations in different situations. Additionally, it can be used as a coating for polyester and linen fabrics, and can be connected in series or in parallel. The experimental findings align closely with the results obtained from DFT calculations. The outcomes demonstrate that the PVDF-SnS2-BiOCl membrane strain sensor, which is highly flexible, sensitive, and attachable, is well-suited for smart wearable electronic materials. © 2024, The Authors. All rights reserved.

关键词： Heterojunctions

Low viscosity epoxy structural adhesive cured at room temperature for crack repair of subway tunnel 2

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Low viscosity epoxy structural adhesive cured at room temper...

2021 2nd International Conference on Mechanical Engineering and materials, ICMEM 2021

作者： Xiao, Ming Sun, Xiaojiang Rong, Huaqing Bi, Shuguang Tang, Jiagong Luo, Xianmeng Ran, Jianhua Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing and Finishing State Key Laboratory of New Textile Materials and Advanced Processing Technologies College of Chemistry and Chemical Engineering Wuhan Textile University Wuhan430200 China Hubei DaTangAnSheng Construction Engineering Co. Ltd Wuhan430050 China

Epoxy structural adhesive has good mechanical properties, especially high adhesion, low shrinkage rate, and high stability, widely used in steel plate reinforcement, crack repair, bridge splicing, and concrete bonding, etc. However, due to the high cross-linking density and high internal stress after curing, its shortcomings, such as brittleness, the poor performance of fatigue resistance and heat resistance, limit its application in special track engineering. In this work, two kinds of epoxy structural adhesives (EPA-1, EPA-2) with low viscosity and room temperature curing were synthesized by selecting different bisphenol A epoxy resin and active diluent as component A and modified amine curing agent as component B. The results showed that EPA-1 and EPA-2 presented significant toughness compared with the classic construction adhesive (AralditeXH160). The yield strengths of EPA-1 and EPA-2 were 4.88 MPa and 13.13 MPa, and the shear strengths were 11.93 MPa and 13.08 MPa, respectively, showing good adhesive properties. In addition, the viscosities of EPA-1 and EPA-2 were 127 mPa·s and 308 mPa·s, respectively, and their decomposition temperatures were all above ~280 ℃, which indicated that the self-made epoxy structural adhesives could be used for the repair of cracks in the vibration subway tunnel. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Heat resistance

C1 Chemistry:The Stories of Research and Applications from Toyama

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Resources Chemicals and materials 2024年第1期3卷 62-92页

作者： Jie Yao Fenghai Cao Yu Han Yang Wang Li Tan Jian Sun Guohui Yang Lei Shi Department of Applied Chemistry School of EngineeringUniversity of Toyam1Toyama 930-8555Japan Institute of Molecular Catalysis and In Situ/Operando Studies State Key Laboratory of Photocatalysis on Energy and EnvironmentCollege of ChemistryFuzhou UniversityFuzhou 350108China Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China College of New Energy State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580China State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China Key Laboratory on Resources Chemicals and Materials of Ministry of Education Shenyang University of Chemical TechnologyShenyang 110142China

This review provides a comprehensive overview of the distinguished academic career and scientific accomplishments of *** Tsubaki at the University of *** over 35 years,he has dedicated himself to the research field of one-carbon(C1)chemistry,including catalytic conversion of C1 molecules to valuable chemicals and superclean fuels,innovative catalyst and reactor development,and the design of new catalytic reactions and *** chronologically,this review highlights ***’s academic contributions from 1990,when he studied and worked at The University of Tokyo,to his current role as a full professor at the University of *** academic section of this review is divided into three main parts,focusing on ***’s pioneering work in C1 *** believe that this review will serve as a highly valuable reference for colleagues in the fields of C1 chemistry and catalysis,and inspire the development of more original and groundbreaking research.

关键词： Low-temperature methanol Fischer-Tropsch Synthesis Bimodal catalysts Capsule Catalysts Tandem catalysis

Enhancing the Combustion Properties of Interface Optimized Metastable Intermixed Composites Pvdf/Μ-Al by Noncovalently Functionalized Graphene

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SSRN 2022年

作者： Shen, Qiang Yi, Zhuoran Deng, Haoyuan Qin, Mei Sun, Yi Luo, Guoqiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Energetic metastable intermixed composites (MICs) consisting of polyvinylidene fluoride (PVDF) and fuels aluminum (Al) have the potential to be used as propellants and explosives. Our study introduced SPEEK-modified graphene (SPG) prepared by non-covalent modification of sulfonated poly(ether-ether-ketone) (SPEEK) into PVDF/Al to improve its energy release. The optimized interface generated by the interaction between SO3H groups of SPG layer and CF2 dipoles of PVDF layer integrates graphene onto the surface of PVDF/Al particles. Due to the effect of graphene on the interfacial thermal resistance, the enthalpy of SPG coated PVDF/Al particles is about 1.5 times higher than that of uncoated particles. The existence of SPG improves the heat transfer efficiency of MICs. For comparison, reduced graphene oxide (RGO) has also been introduced as an additive. Graphene is introduced to linearly affect(R2=0.9865) the main oxidation enthalpy by lifting the surface oxidation heat release of the Al core. Therefore, graphene is a new strategy for increasing the energy release rate while improving the energy output. © 2022, The Authors. All rights reserved.

关键词： Graphene