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Efficient wide-bandgap perovskite solar cells with open-circuit voltage deficit below 0.4 V via hole-selective interface engineering

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Science China Chemistry 2024年第6期67卷 2102-2110页

作者： Xiaoyu Ji Shuo Zhang Furong Yu Huidong Zhang Liqing Zhan Yue Hu wei-hong zhu Yongzhen Wu Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Shanghai Key Laboratory of Functional Materials ChemistryFrontiers Science Center for Materiobiology and Dynamic ChemistryInstitute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China School of Chemistry University of EdinburghKing’s BuildingsEdinburghEH93FJUK

Wide-bandgap mixed-halide perovskite solar cells(WBG-PSCs)are promising top cells for efficient tandem photovoltaics to achieve high power conversion efficiency(PCE)at low ***,the open-circuit voltage(V_(OC))of WBG-PSCs is still unsatisfactory as the V_(OC)-deficit is generally larger than 0.45 ***,we report a buried interface engineering strategy that substantially improves the V_(OC)of WBG-PSCs by inserting amphiphilic molecular hole-selective materials featuring with a cyanovinyl phosphonic acid(CPA)anchoring group between the perovskite and *** assembly and redistribution of CPA-based amphiphilic molecules at the perovskite-substrate buried interface not only promotes the growth of a low-defect crystalline perovskite thin film,but also suppresses the photo-induced halide phase *** energy level alignment between wide-bandgap perovskite and the hole-selective layer is further improved by modulating the substituents on the triphenylamine donor moiety(methoxyls for MPA-CPA,methyls for Me PA-CPA,and bare TPA-CPA).Using a 1.68 e V bandgap perovskite,the Me PA-CPA-based devices achieved an unprecedentedly high V_(OC)of 1.29 V and PCE of 22.3%under standard AM 1.5 *** V_(OC)-deficit(<0.40 V)is the lowest value reported for *** work not only provides an effective approach to decreasing the V_(OC)-deficit of WBG-PSCs,but also confirms the importance of energy level alignment at the charge-selective layers in PSCs.

关键词： cyanovinyl phosphonic acid energy level alignment hole-selective material open-circuit voltage wide-bandgap perovskite

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A new strategy enabling intramolecular motion to obtain advanced photothermal materials

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Science China Chemistry 2019年第6期62卷 659-661页

作者： wei-hong zhu Shanghai Key Laboratory of Functional Materials Chemistry Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology

Recently, considerable research interest has been focused on biomedical application of the photothermal materials, such as photoacoustic imaging (PAI) and photothermal therapy (PTT). PAI technique that roots in near-infrared (NIR) light excitation and ultrasonic detection has been extensively investigated in recent years since it surpasses the imaging depth limit of traditional optical imaging techniques, thereby providing deeper tissue penetration and higher spatial solution [1]. So far, several kinds of NIR-absorbing photothermal materials including gold nanorods/nanoshells, carbon nanotubes, 2D materials, semiconducting polymers and small-molecule organic dyes have been well studied for PAI and PTT.

关键词： Recently PAI PTT

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Enhancement strategies of targetability, response and photostability for in vivo bioimaging

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Science China Chemistry 2019年第2期62卷 189-198页

作者： Kaizhi Gu wei-hong zhu Xiaojun Peng Shanghai Key Laboratory of Functional Materials Chemistry Key Laboratory for Advanced Materials and Institute of Fine Chemicals Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry and Molecular Engineering East China University of Science & Technology State Key Laboratory of Fine Chemicals Dalian University of Technology

Analyses of the physiology and pathology of active biochemical species in their native contexts are critical for early diagnosis and therapy. Optical imaging has emerged as one of the promising modalities for noninvasive and real-time visualization of important biomolecules or biological events, and it has witnessed major advances in the field of imaging in vitro and in vivo. In this review, we present a survey of common approaches and tactics for enhanced targetability, response rate, and photostability in bioimaging applications. Recently developed and representative examples are illustrated on the cellular and tissue levels.

关键词： fluorescent probe bioimaging targetability response rate photostability

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Unexpected synthesis of structure-tunable AIE-active acrylonitriles by simple temperature variation for bioimaging

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Science China Chemistry 2019年第12期62卷 1549-1550页

作者： Bei Jiang wei-hong zhu Institute of Materia Medica&College of Pharmacy and Chemistry Dali UniversityDali 671000China Shanghai Key Laboratory of Functional Materials Chemistry Key L aboratory for Advanced Materials and Institute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

Small molecule-based fluorescence imaging is an indispensable tool for direct visualization and dynamic tracking of important biological species in live samples,due to its excellent sensitivity,remarkable selectivity,easy and fast acquisition,and non-invasive property[1,2].In comparison with one-photon fluorescence imaging,two-photon fluorescence imaging is highly preferable because of pulsed near-infrared(NIR)laser irradiation,resulting in minimal back-ground autofluorescence,high spatial resolution,and deep tissue penetration.

关键词： synthesis selectivity property

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An optimal rigidity theorem for complete submanifolds in a sphere

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Applied Mathematics(A Journal of Chinese Universities) 2008年第2期23卷 219-226页

作者： XU hong-wei zhu Jiao-feng Center of Math. Sci. Zhejiang Univ. Hangzhou 310027 China

It is proved that if M^n is an n-dimensional complete submanifold with parallel mean curvature vector and flat normal bundle in S^n＋p（1）, and if supM S 〈 α（n, H）, where α（n,H）=n＋n^3/2（n-1）H^2-n（n-2）/n（n-1）√n^2H^4＋4（n-1）H^2,then M^n must be the totally urnbilical sphere S^n（1/√1＋H^2）.An example to show that the pinching constant α（n, H） appears optimal is given.

关键词： submanifold rigidity flat normal bundle mean curvature.

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Amazing long-lived lifetime

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Green Energy & Environment 2017年第2期2卷 67-69页

作者： weiwei Zhang wei-hong zhu Shanghai Key Laboratory of Functional Materials Chemistry Key Laboratory for Advanced Materials and Institute of Fine Chemicals Collaborative Innovation Center for Coal Based Energy (i-CCE) School of Chemistry and Molecular EngineeringEast China University of Science and Technology

Bulk thanks to their characteristics of being environmentally benign,easily fabricated and relatively stable,dyesensitized solar cells(DSSCs)have attracted attention over decades as a potential alternative to solar energy conversion[1].However,as *** pointed out in 2011,'although much more is now known about the physical and chemical processes taking place during operation of the DSSCs,the exponential increase in research effort during this period has not been matched by large increases in efficiency'[2].To date,

关键词： PCE RS Amazing long-lived lifetime

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Photoresponsive aggregation-induced emission polymer film for anti-counterfeiting

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Chinese Chemical Letters 2021年第12期32卷 3882-3885页

作者： hong Yang Mengqi Li weijun Zhao Zhiqian Guo wei-hong zhu Shanghai Key Laboratory of Functional Materials Chemistry Key Laboratory for Advanced Materials and Institute of Fine Chemicals.Joint International Research Laboratory of Precision Chemistry and Molecular EngineeringFeringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry and Molecular EngineeringEast China University of Science&TechnologyShanghai 200237China

The development of solid-state smart materials, in particular those showing photoresponsive luminescence, is highly desirable for their cutting edge applications in displays, sensors, data-storage, and anticounterfeiting. However, to achieve both excellent photoresponsive performance and bright luminescence in solid state remains challenge. Herein, we integrate a novel photochromic fluorophore YL into flexible polymer chains, thereby enabling the resultant polymer PYL with reversible photoisomerization upon aggregation. Remarkably, the polymer PYL possesses excellent photochromic properties and aggregationinduced emission(AIE) activity, which can be attributed to the photoactive YL moiety. Upon light exposure, its film exhibits reversibly off-to-on fluorescent modulation with quick response, high emission efficiency and signal contrast, sharply different from the weak emission in solution. The novel photoresponsive AIE polymer with invisible/visible color and fluorescence transformation allows for advanced anti-counterfeiting applications. This work provides an efficient platform for constructing solid-state photocontrollable luminescent materials.

关键词： Aggregation-induced emission Photoresponsive luminescence Diarylethene Photochromism Polymer film Anti-counterfeiting

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Trapping endoplasmic reticulum with amphiphilic AIE-active sensor via specific interaction of ATP-sensitive potassium(KATP)

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National Science Review 2021年第6期8卷 34-45页

作者： Zhirong zhu Qi Wang hongze Liao Ming Liu Zhenxing Liu Youheng Zhang wei-hong zhu Shanghai Key Laboratory of Functional Materials Chemistry Key Laboratory for Advanced Materials and Institute of Fine ChemicalsJoint International Research Laboratory of Precision Chemistry and Molecular EngineeringFeringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science and Technology Research Center for Marine Drugs State Key Laboratory of Oncogene and Related GenesDepartment of PharmacyRen Ji HospitalSchool of MedicineShanghai Jiao Tong University

The current aggregation-induced emission luminogens(AIEgens) sometimes suffer from poor targeting selectivity due to undesirable aggregation in the hydrophilic biosystem with ‘always-on’ fluorescence or unspecific aggregation in the lipophilic organelle with prematurely activated fluorescence. Herein, we report an unprecedented ‘amphiphilic AIEgen’ sensor QM-SO3-ER based on the AIE building block of quinoline-malononitrile(QM). The introduced hydrophilic sulfonate group can well control the specific solubility in a hydrophilic system with desirable initial ‘fluorescence-off’ state. Moreover, the incorporated p-toluenesulfonamide group plays two roles: enhancing the lipophilic dispersity, and behaving as binding receptor to the adenosine triphosphate(ATP)-sensitive potassium(KATP) on the endoplasmic reticulum(ER) membrane to generate the docking assay confinement effect with targetable AIE signal. The amphiphilic AIEgen has for the first time settled down the predicament of unexpected ‘always-on’fluorescence in the aqueous system and the untargetable aggregation signal in the lipophilic organelle before binding to ER, thus successfully overcoming the bottleneck of AIEgens’ targetability.

关键词： aggregation-induced emission amphiphilic AIEgens endoplasmic reticulum targeting specificity high-fidelity tracking

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Reversible light-driven magnetic switching of salen cobalt complex

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Science China Chemistry 2020年第9期63卷 1191-1197页

作者： Song Wan Mengqi Li Zhipeng Zhang Hancheng Xi hong Yang Qianfu Luo wei-hong zhu Shanghai Key Laboratory of Functional Materials Chemistry Key Laboratory for Advanced Materials and Institute of Fine ChemicalsJoint International Research Laboratory of Precision Chemistry and Molecular EngineeringFeringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science&TechnologyShanghai 200237China

Spin-crossover(SCO)metal complexes are expected to be widely used in data storage materials,display devices and *** a lot of spin-crossover photoswitches have been developed,the reversible photomodulation cases that work at room temperature are ***,a novel cobalt complex o-1-Co(II)wherein the salen unit bridges with bis-diarylethene has been designed as switch to construct"off-on"logic operation at room *** complex o-1-Co(II)displays an abrupt,reversible and hysteretic spin crossover(T1/2↓=166 K,T1/2↑=177 K,andΔT1/2=11 K)between the high-spin(HS)and low-spin(LS)***,photocyclization of o-1-Co(II)with UV light produces a photoresponsive closed form c-1-Co(II),which always stays at low-spin without SCO at ***,the magnetic switching of the complex can also be achieved with redox reactions between Co(II)and Co(III).

关键词： photochromism diarylethene salen complex spin-crossover magnetic switch

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Relative roles of resuspended particles and pore water in release of contaminants from sediment

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Water Science and Engineering 2014年第3期7卷 344-350页

作者： hong-wei zhu Peng-da CHENG Dao-zeng WANG Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and MechanicsShanghai University Key Laboratory of Waterway Dredging Technology Ministry of TransportNational Engineering Research Center of Dredging Technology and Equipment School of Mechatronical Engineering and Automation Shanghai University

Sediment layers containing contaminants play a significant role in environmental hydrodynamics. Experiments were conducted in order to characterize the relative roles of resuspended particles and pore water under different flow and sediment conditions. A conservative tracer （NaC1） and a reactive tracer （phosphate） were used as contaminants in the bottom sediment in a laboratory flume. The mixing between the overlying water and pore water occurred over a short time while the desorption of contaminants from fine-grained resuspended particles lasted a relatively long time. The effects of resuspended particles and pore water on the variations of release flux and concentration of contaminants in water with time under different hydrodynamic conditions were quantified. The results show that pore water dominated the initial release flux, which could be several orders of magnitude greater than the flux due to molecular diffusion. Flux contribution of desorption from sediment particles in the latter release could be equal to what was seen from pore water in the initial stage.

关键词： sediment resuspension resuspended particle pore water, release of contaminants release flux

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