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Ecofriendly Hydroxyalkyl Cellulose Additives for Efficient and Stable MAPbI_(3)-Based Inverted Perovskite Solar Cells

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Energy & Environmental Materials 2023年第5期6卷 251-259页

作者： Xuefeng Zhu Rui Lin Hao gu Huichao Hu Zheng Liu guichuan xing Yibing Wu Xinhua Ouyang College of Material Engineering Fujian Agriculture and Forestry UniversityFuzhou 350002China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoAvenida da UniversidadeTaipaMacao 999078China

Perovskite solar cells(PSCs)have been demonstrated to be one of the most promising technologies in the field of renewable ***,the presence of the defects in the perovskite films greatly limits the efficiency and the stability of the *** additive engineering is one of the most effective approaches to overcome this *** of the successful additives are extracted from the petroleum-based materials,while the research on the biomass-based additives is still lagging *** this paper,two ecofriendly hydroxyalkyl cellulose additives,i.e.,hydroxyethyl cellulose(HEC)and hydroxylpropyl cellulose(HPC),are investigated on the performance of the MAPbl_(3)-based inverted *** to the strong interaction between the hydroxyl groups of the cellulose and the divalent cations of the perovskite,these additives enhance the crystal grain orientation and significantly repair the defects of the perovskite *** as the additives,these two cellulose derivatives show a strong passivation ability,which significantly reduces the trap density and improves the optoelectronic feature of the *** with the average power conversion efficiency(PCE)of the control device(19.19%),an enhancement of~10%is achieved after the addition of *** optimized device(PCE=21.25%)with a long-term stability(10:80 h,PCE=20.93%)is achieved by the incorporation of the HEC additives into the precursor *** is the best performance among the PSCs with the cellulose additives up to *** research provides a novel choice to develop a cost-effective and renewable additive for the PSCs with high efficiency and excellent long-term stability.

关键词： additives hydroxyalkyl cellulose inverted perovskite solar cells MAPbl_(3)

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Physical Insight for Grafting Polymer Chains onto the Substrate via Computer Simulations:Kinetics and Property

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Chinese Journal of Polymer Science 2022年第7期40卷 817-833页

作者： Chi-Xin Liang Hui Lu Bai-Ying Huang Ji-Yuan xing Feng-Long gu Hong Liu School of Chemistry South China Normal UniversityKey Laboratory of Theoretical Chemistry of Environment Ministry of EducationGuangzhou510006China State Key Laboratory of Supramolecular Structure and Materials Institute of Theoretical ChemistryCollege of ChemistryJilin UniversityChangchun130023China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China

Molecules adsorbed or attached on a surface is a quite basic phenomenon in numerous chemical or biological ***-onto is considered as a feasible way to achieve *** grafting reaction is essentially controlled by the diffusion of the molecules,thus it is more likely a physical issue,instead of a chemical *** of the experimental difficulty in measuring the properties of surface-attached molecules(e.g.,the polymeric molecules),the surface-bound molecules are often assumed as with the same properties as that of the start feeding ones in *** assumption was even used to guide further characterization,while it is proved to be invalid by different quantifying ***,an effective prediction for the properties of surface-bound molecules is still *** on a microscopic level and a dynamic perspective,the grafting process onto a flat substrate with polydisperse feeding polymeric molecules is investigated in-depth by coarse-grained Brownian dynamics simulation as well as model *** find from simulations that for the final grafting densityσ_(g)and the mean chain length of start feeding molecules,the dependence ofσ_(g)-^(γ)with the constant exponential factorγmay be a determined rule for one-end functionalized flexible linear polymer chains grafting on the flat *** grafting-onto is a multiple interplayed process,our simulation study indicates that there is an optimized initial concentration of start feeding molecules for achieving high grafting density of surface-bound *** also propose a correctional equation to quantitatively predict the molecular weight distribution(MWD)of surface-bound polymeric molecules,which may be effective for predicting the MWD of the surface-bound ones in specific *** simulation study helps to better understand the kinetics of grafting-onto process,and serves as a theoretical guide to achieve the precise design of surface modification materials vi

关键词： Grafting-onto Grafting density Polydisperse Molecular weight distribution

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Colorless to black switching with high contrast ratio via the electrochemical process of a hybrid organic-inorganic perovskite

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Carbon Energy 2023年第11期5卷 90-100页

作者： Ming Xu Jianmin gu Zixun Fang Yu Li xing Wang Xiaoyu Zhao Tifeng Jiao Wei Wang State Key Laboratory of Metastable Materials Science and Technology(MMST) Hebei Key Laboratory of Applied ChemistryYanshan UniversityQinhuangdaoChina Department of Food and Pharmaceutical Engineering Suihua UniversitySuihuaChina Department of Chemistry Centre for PharmacyUniversity of BergenBergenNorway

Colorless‐to‐black switching has attracted widespread attention for smart windows and multifunctional displays because they are more useful to control solar ***,it still remains a challenge owing to the tremendous difficulties in the design of completely reverse absorptions in transmissive and colored ***,we report on an electrochemical device that can switch between colorless and black by using the electrochemical process of hybrid organic–inorganic perovskite MAPbBr_(3),which shows a high integrated contrast ratio of up to 73%from 400 to 800 *** perovskite solution can be used as the active layer to assemble the device,showing superior transmittance over the entire visible region in neutral *** applying an appropriate voltage,the device undergoes reversible switching between colorless and black,which is attributed to the formation of lead and Br_(2)in the redox reaction induced by the electron transfer process in MAPbBr_(3).In addition,the contrast ratio can be modulated over the entire visible region by changing the concentration and the applied *** results contribute toward gaining an insightful understanding of the electrochemical process of perovskites and greatly promoting the development of switchable devices.

关键词： colorless to black switching electrochemical process high integrated contrast ratio hybrid organic-inorganic perovskite switchable devices

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High-performance flexible perovskite photodetectors based on single-crystal-like two-dimensional Ruddlesden-Popper thin films

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Carbon Energy 2023年第2期5卷 250-259页

作者： Chao Liang Hao gu Junmin Xia Tanghao Liu Shiliang Mei Nan Zhang Yonghua Chen guichuan xing Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoAvenida da UniversidadeTaipaMacaoPR China Key Laboratory of Flexible Electronics(KLOFE) Jiangsu National Synergetic Innovation Centre for Advanced Materials(SICAM)Institution of Advanced Materials(IAM)Nanjing Tech University(NanjingTech)NanjingJiangsuPR China

Two-dimensional Ruddlesden-Popper(2DRP)perovskites have attracted intense research interest for optoelectronic applications,due to their tunable optoelectronic properties and better environmental stability than their threedimensional ***,high-performance photodetectors based on single-crystal and polycrystalline thin-films 2DRP perovskites have shown great potential for practical ***,the complex growth process of single-crystal membranes and uncontrollable phase distribution of polycrystalline films hinder the further development of 2DRP perovskites ***,we report a series of high-performance photodetectors based on single-crystal-like phase-pure 2DRP perovskite films by designing a novel spacer *** and theoretical evidence demonstrates that phase-pure films substantially suppress defect states and ion *** highly sensitive photodetectors show I_(light)/I_(dark) ratio exceeding 3×10^(4),responsivities exceeding 16 A/W,and detectivities exceeding 3×10^(13) Jones,which are higher at least by 1 order than those of traditional mixed-phase thinfilms 2DRP devices(close to the reported single-crystal devices).More importantly,this strategy can significantly enhance the operational stability of optoelectronic devices and pave the way to large-area flexible productions.

关键词： flexibility photodetectors single-crystal-like stability two-dimensional perovskites

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Band alignment and polarization engineering inκ-Ga_(2)O_(3)/GaN ferroelectric heterojunction

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Science China(Physics,Mechanics & Astronomy) 2022年第7期65卷 147-152页

作者： Yanting Chen Hongkai Ning Yue Kuang xing-xing Yu He-He Gong Xuanhu Chen Fang-Fang Ren Shulin gu Rong Zhang Youdou Zheng Xinran Wang Jiandong Ye School of Electronic Science and Engineering Nanjing UniversityNanjing 210023China

Ferroelectric-semiconductor heterostructures offer an alternative strategy to manipulate polarization towards advanced devices with engineered functionality and improved *** this work,we report on the heteroepitaxial construction,band structure alignment and polarization engineering of the single-phasedκ-Ga_(2)O_(3)/GaN ferroelectric/polar heterojunction.A type-II band alignment is determined at theκ-Ga_(2)O_(3)/GaN polar hetero-interface,with a valence band offset of(1.74±0.1)eV and a conduction band offset of(0.29■0.1)*** the band edge discontinuity,charge dipoles induced by spontaneous polarization lead to the observed band bending with built-in potentials of 0.9 and 0.33 eV,respectively,at theκ-Ga_(2)O_(3)surface andκ-Ga_(2)O_(3)/GaN *** polarization switching properties of ferroelectricκ-Ga_(2)O_(3)are identified with a remanent polarization of approximately 2.7μC/cm^(2)via the direct hysteresis remanent polarization/voltage(P-V)loop *** findings allow the rational design ofκ-Ga_(2)O_(3)ferroelectric/polar heterojunction for the application of power electronic devices,advanced memories and even ultra-low loss negative capacitance transistors.

关键词： wide-bandgap semiconductors ferroelectric polarization band alignment

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Nanomaterials-mediated lysosomal regulation:a robust protein-clearance approach for the treatment of Alzheimer’s disease

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Neural Regeneration Research 2025年第2期20卷 424-439页

作者： Mengqi Hao Jianjian Chu Tinglin Zhang Tong Yin Yuankai gu Wendanqi Liang Wenbo Ji Jianhua Zhuang Yan Liu Jie Gao You Yin Department of Neurology Second Affiliated Hospital of Naval Medical University(Shanghai Changzheng Hospital)ShanghaiChina School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghaiChina Changhai Clinical Research Unit Shanghai Changhai HospitalNaval Medical UniversityShanghaiChina Department of Clinical Pharmacy Xinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Department of Neurology Shanghai East HospitalSchool of MedicineTongji UniversityShanghaiChina

Alzheimer’s disease is a debilitating,progressive neurodegenerative disorder characterized by the progressive accumulation of abnormal proteins,including amyloid plaques and intracellular tau tangles,primarily within the ***,crucial intracellular organelles responsible for protein degradation,play a key role in maintaining cellular *** studies have suggested a link between the dysregulation of the lysosomal system and pathogenesis of neurodegenerative diseases,including Alzheimer’s *** the normal physiological function of lysosomes hold the potential to reduce the pathological burden and improve the symptoms of Alzheimer’s ***,the efficacy of drugs in treating Alzheimer’s disease is limited,with major challenges in drug delivery efficiency and ***,nanomaterials have gained widespread use in Alzheimer’s disease drug research owing to their favorable physical and chemical *** review aims to provide a comprehensive overview of recent advances in using nanomaterials(polymeric nanomaterials,nanoemulsions,and carbon-based nanomaterials)to enhance lysosomal function in treating Alzheimer’s *** review also explores new concepts and potential therapeutic strategies for Alzheimer’s disease through the integration of nanomaterials and modulation of lysosomal *** conclusion,this review emphasizes the potential of nanomaterials in modulating lysosomal function to improve the pathological features of Alzheimer’s *** application of nanotechnology to the development of Alzheimer’s disease drugs brings new ideas and approaches for future treatment of this disease.

关键词： Alzheimer’s disease autophagy dysfunction lysosomal acidification lysosomal system nanomaterials neurodegenerative diseases

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DNA methylation modification in heterosis initiation through analyzing rice hybrid contemporary seeds

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The Crop Journal 2021年第5期9卷 1179-1190页

作者： Shirong Zhou Meiqing xing Zhilong Zhao Yincong gu Yunping Xiao Qiaoquan Liu Hongwei Xue State Key Laboratory of Crop Genetics and Germplasm Enhancement Jiangsu Plant Gene Engineering Research CenterNanjing Agricultural UniversityNanjing 210095JiangsuChina Joint Center for Single Cell Biology School of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200032China Shanghai OEbiotech Shanghai 201210China Co-Innovation Center for Modern Production Technology of Grain Crops of Jiangsu Province Key Laboratory of Plant Functional Genomics of the Ministry of EducationYangzhou UniversityYangzhou 225009JiangsuChina

Heterosis is an important biological phenomenon and widely applied in *** many studies have been performed by using vegetative organs of F_(1) hybrid plants,how heterosis (or hybrid vigor) is initiated and formed,particularly the underlying molecular mechanism,remain *** contemporary seeds of rice indica varieties 9311 and PA64 were innovatively used and analysis of DNA methylome of embryo and endosperm at early developing stages revealed the globally decreased DNA ***,especially those relate to hormones function and transcriptional regulation present non-additive *** identified heterosis-related superior genes are non-additively methylated in early developing hybrid contemporary seeds,suggesting that key genes/loci responsible for heterosis are epigenetically modified even in early developing hybrid seeds and hypomethylation of hybrid seeds after cross-pollination finally result in the long-term transcriptional change of F_(1) hybrid vegetative tissues after germination,demonstrating that altered DNA methylation in hybrid seeds is essential for initiation regulation and maintenance of heterosis exhibiting in F_(1) hybrid ***,a large number of genes show non-additive methylation in the endosperm of reciprocal hybrids,suggesting that endosperm might also contribute to heterosis.

关键词： DNA methylome Heterosis Rice Reciprocally hybrid seeds Embryo Endosperm

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Numerical optimisation of a classical stochastic system for targeted energy transfer

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Theoretical & Applied Mechanics Letters 2023年第3期13卷 170-176页

作者： Oleg Gaidai Yubin gu Yihan xing Junlei Wang Daniil Yurchenko Shanghai Engineering Research Center of Marine Renewable Energy Shanghai Ocean UniversityChina School of Mechanical and Electrical Engineering Guilin University of Electronic TechnologyChina Department of Machine Building and Materials TechnologyUniversity of StavangerNorway School of Mechanical and Power Engineering Zhengzhou UniversityChina Institute for Sound and Vibration Research University of SouthamptonUK

The paper studies stochastic dynamics of a two-degree-of-freedom system,where a primary linear system is connected to a nonlinear energy sink with cubic stiffness nonlinearity and viscous *** the primary mass is subjected to a zero-mean Gaussian white noise excitation,the main objective of this study is to maximise the efficiency of the targeted energy transfer in the system.A surrogate optimisation algorithm is proposed for this purpose and adopted for the stochastic *** optimisations are conducted separately for the nonlinear stiffness coefficient alone as well as for both the nonlinear stiffness and damping coefficients *** different optimisation cost functions,based on either energy of the system’s components or the dissipated energy,are *** results demonstrate some clear trends in values of the nonlinear energy sink coefficients and show the effect of different cost functions on the optimal values of the nonlinear system’s coefficients.

关键词： Targeted energy transfer Surrogate optimisation Stochastic system Random vibration

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Two-proton radioactivity of ground and excited states within a unified fission model

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Chinese Physics C 2021年第12期45卷 129-139页

作者： Fengzhu xing Jianpo Cui Yanzhao Wang Jianzhong gu Department of Mathematics and Physics Shijiazhuang Tiedao UniversityShijiazhuang 050043China Institute of Applied Physics Shijiazhuang Tiedao UniversityShijiazhuang 050043China China Institute of Atomic Energy P.O.Box 275(10)Beijing 102413China

A unified fission model is extended to study two-proton radioactivity of the ground states of nuclei,and a good agreement between the experimental and calculated half-lives is *** two-proton radioactivity half-lives of the ground states of some probable candidates are predicted within this model by inputting the released energies taken from the AME2020 *** is shown that the predictive accuracy of the half-lives is comparable to those of other ***,two-proton radioactivity of the excited states of^(14)O,^(17,18)Ne,^(22)Mg,^(29)S,and^(94)Ag is discussed within the unified fission model and two analytical *** is found that the experimental half-lives of the excited states are reproduced better within the unified fission ***,the two formulas are not suitable for the study of two-proton radioactivity of excited states because their physical appearance deviates from the mechanism of quantum tunneling,and the parameters involved are obtained without including experimental data from the excited states.

关键词： two-proton radioactivity released energy half-life unified fission model analytical formula

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APPLICATION OF A MODIFIED QUICK SCHEME TO DEPTH-AVERAGED k-ε TURBULENCE MODEL BASED ON UNSTRUCTURED GRIDS

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Journal of Hydrodynamics 2008年第4期20卷 514-523页

作者： HUA Zu-lin xing Ling-hang gu Li Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering College of Environmental Science and Engineering Hohai University Nanjing 210098 China

The modified QUICK scheme on unstructured grid was used to improve the advection flux approximation, and the depth-averaged κ-ε turbulence model with the scheme based on FVM by SIMPLE series algorithm was established and applied to spur-dike flow computation. In this model, the over-relaxed approach was adopted to estimate the diffusion flux in view of its advantages in reducing errors and sustaining numerical stability usually encountered in non-orthogonal meshes. Two spur-dike cases with different defection angles （90°and 135°） were analyzed to validate the model. Computed results show that the predicted velocities and recirculation lengths are in good agreement with the observed data. Moreover, the computations on structured and unstructured grids were compared in terms of the approximately equivalent grid numbers. It can be concluded that the precision with unstructured grids is higher than that with structured grids in spite that the CPU time required is slightly more with unstructured grids Thus, it is significant to apply the method to numerical simulation of practical hydraulic engineering.

关键词： unstructured grid modified QUICK FVM κ-ε turbulence model spur-dike

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