检索结果-南通市图书馆

Carbon Energy 2024年第4期6卷 164-221页

作者： Huilin Hou Gang Shao Yang Wang wai‐yeung wong Weiyou Yang Institute of Micro/Nano Materials and Devices Ningbo University of TechnologyNingboChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhouChina Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong KongChina

Conversion of solar energy into H_(2) by photoelectrochemical(PEC)water splitting is recognized as an ideal way to address the growing energy crisis and environmental *** a typical PEC cell,the construction of photoanodes is crucial to guarantee the high efficiency and stability of PEC reactions,which fundamentally rely on rationally designed semiconductors(as the active materials)and substrates(as the current collectors).In this review work,we start with a brief introduction of the roles of substrates in the PEC ***,we provide a systematic overview of representative strategies for the controlled fabrication of photoanodes on rationally designed substrates,including conductive glass,metal,sapphire,silicon,silicon carbide,and flexible ***,some prospects concerning the challenges and research directions in this area are proposed.

关键词： hydrogen photoanode photoelectrochemical substrates water splitting

Recent progress in circularly polarized multi-resonance thermally activated delayed fluorescence materials for organic light-emitting diodes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2024年

作者： He Jiang Dan Ai Jibiao Jin Zheng Xie wai-yeung wong Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic University School of Chemistry and Chemical Engineering University of Jinan The Hong Kong Polytechnic University Shenzhen Research Institute

Circularly polarized luminescence(CPL) is of importance to advance science and technology with significant potential applications in information storage, spintronics and optoelectronic devices. Integrating CPL and the emission mechanism of thermally activated delayed fluorescence(TADF) has attracted considerable attention, because of their 100% internal quantum efficiency in theory and easily modified molecular structures for tunable photo-electrical properties. However, the typical donor-acceptor(D-A) architecture of CP-TADF emitters generally induces a broad emission profile with inferior color purity due to their large structural relaxation under the processes of excitation and emission. Recently, CP-multi-resonance(MR)-TADF emitters that concurrently display CPL activity, narrowband emission and high efficiency are emerging as the most suitable candidates for the next-generation organic light-emitting diode(OLED) display. In this review, the progress of CP-MR-TADF materials is reviewed in terms of the molecular design strategy, the common relationship between the molecular structures and optoelectronic properties, and their OLEDs performance. Finally, the opportunities and challenges in this research topic are discussed.

关键词：

Over 18.2%efficiency of layer–by–layer all–polymer solar cells enabled by homoleptic iridium(Ⅲ)carbene complex as solid additive

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2024年第18期69卷 2862-2869页

作者： Hang Zhou Yingjie Sun Miao Zhang Yuheng Ni Fenghua Zhang Sang Young Jeong Tianhuan Huang Xiong Li Han Young Woo Jian Zhang wai-yeung wong Xiaoling Ma Fujun Zhang Key Laboratory of Luminescence and Optical Information(Ministry of Education) Beijing Jiaotong UniversityBeijing 100044China Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong Kong 999077China Department of Physics Beijing Technology and Business UniversityBeijing 100048China Organic Optoelectronic Materials Laboratory Department of ChemistryCollege of ScienceKorea UniversitySeoul 02841Republic of Korea School of Materials Science and Engineering Engineering Research Center of Electronic Information Materials and DevicesMinistry of EducationGuangxi Key Laboratory of Information MaterialsGuilin University of Electronic TechnologyGuilin 541004China Tangshan Research Institute of Beijing Jiaotong University Tangshan 063000China

The vertical phase distribution of active layers plays a vital role in balancing exciton dissociation and cha rge transport for achieving efficient polymer solar cells(PSCs).The layer-by-layer(LbL)PSCs are commonly prepared by using sequential spin-coating method from donor and acceptor solutions with distinct solvents and solvent *** enhanced exciton dissociation is expected in the LbL PSCs with efficient charge transport in the relatively neat donor or acceptor *** this work,a series of LbL all-polymer solar cells(APSCs)were fabricated with PM6 as donor and PY-DT as acceptor,and triplet material m-Ir(CPmPB)_(3)is deliberately incorporated into PY-DT layer to prolong exciton lifetimes of active *** power conversion efficiency(PCE)of LbL APSCs is improved to 18.24%from 17.32%by incorporating 0.3 wt%m-Ir(CPMPB)_(3)in PY-DT layer,benefiting from the simultaneously enhanced short-circuit current density(Isc)of 25.17 mA cm^(-2)and fill factor(FF)of 74.70%.The enhancement of PCE is attributed to the efficient energy transfer of m-Ir(CPmPB)_(3)to PM6 and PY-DT,resulting in the prolonged exciton lifetime in the active layer and the increased exciton diffusion *** efficient energy transfer from m-Ir(CPmPB)_(3)to PM6 and PY-DT layer can be confirmed by the increased photoluminescence(PL)intensity and the prolonged PL lifetime of PM6 and PY-DT in PM6+m-Ir(CPmPB)_(3)and PY-DT+m-Ir(CPmPB)_(3)*** study indicates that the triplet material as solid additive has great potential in fabricating efficient LbL APSCs by prolonging exciton lifetimes in active layers.

关键词： Layer-by-layer All-polymer solar cells Additive strategy Triplet material Energy transfer

Polymetallaynes and Molecular Metallaynes Containing Platinum,Mercury and Gold for Optoelectronic and Magnetic Applications

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2023年第17期41卷 2159-2178页

作者： Chen Zhang Linli Xu wai-yeung wong Departmentof Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHung HomHong Kongchina

omprehensive Summary,Polymetallaynes are a promising branch of metallopolymers,in which the introduction of metal building blocks to organic conjugated backbones leads to their unique skeletons and versatile ***,the chemical structures,geometric configurations and functional properties in these organometallic systems can be adjusted flexibly by the appropriate selection of metal centers,auxiliary ligands,or bridging *** recent years,both one-dimensional and two-dimensional polymetallaynes have attracted considerable attention owing to their excellent electronic,optical and magnetic ***,the studies on molecular metallaynes provide substantial insights for the exploration of the structure-property-activity relationships in these organometallic acetylide-containing *** recent research progress of polymeric and molecular metallaynes containing platinum,mercury and gold is discussed in this article.A series of functional properties have been realized in these acetylide-containing compounds by the rational structural design and refined synthetic strategies,leading to their emerging applications including energy conversion,nonlinear optics,data storage and memory,as well as chemo/biosensing.

关键词： Polymetallayne Molecular metallayne Metallated graphyne Platinum Mercury Gold

Atomically precise copper nanoclusters as ultrasmall molecular aggregates:Appealing compositions,structures,properties,and applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

聚集体(英文)

聚集体(英文) 2023年第1期4卷 122-147页

作者： Leon Li-Min Zhang wai-yeung wong Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong KongP.R.China Shenzhen Research Institute The Hong Kong Polytechnic UniversityShenzhenP.R.China

Metal nanoclusters(NCs)are ultrasmall molecular aggregates consisting of dozens to hundreds of metal atoms consolidated by organic ligands,which represent an emerging area of *** a myriad of metal NCs,copper NCs(CuNCs)comprise a low-cost,high-value subclass that has attracted great *** variable copper cores and diversity of protecting ligands have rendered CuNCs interesting molecular aggregates featuring structural and compositional versatility,hence showing distinctive properties and potential *** the present review,we have summarized the progress on atomically precise CuNCs that exhibit a range of appealing properties and applications in different *** review is expected to provide not only an overview of the current development on atomically precise CuNCs,but also possible directions for the future design of novel CuNCs for fundamental studies and practical applications.

关键词： applications atomically precise structures copper nanoclusters properties

Recent progress of electronic materials based on 2,1,3-benzothiadiazole and its derivatives:synthesis and their application in organic light-emitting diodes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2021年第3期64卷 341-357页

作者： Youming Zhang Jun Song Junie Qu Peng-Cheng Qian wai-yeung wong Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy1 The Hong Kong Polytechnic University(PolyU)Hung HomHong KongChina PolyU Shenzhen Research Institute Shenzhen 518057China College of Materials Science and Engineering Shenzhen UniversityShenzhen 518060China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering.Shenzhen UniversityShenzhen 518060China Key Laboratoty of Environmental Functional Materials Technology and Application of Wenzhou City Institute of New Materials&IndustiyCollege of Chemistry&Materials Engineering.Wenzhou UniversityWenzhou 325035China

2,1,3-Benzothiadiazole(BT)and its derivatives are very important acceptor units used in the development of photoluminescent compounds and are applicable for the molecular construction of organic light-emitting diodes,organic solar cells and organic field-effect *** to their strong electron-withdrawing ability,construction of molecules with the unit core of BT and its derivatives can usually improve the electronic properties of the resulting organic *** this contribution,we review the synthesis of various polymers,small molecules and metal complexes with BT and its derivatives and their applications in organic light-emitting ***,the molecular design rules based on these cores are discussed.

关键词： 2,1,3-benzothiadiazole organic light-emitting diodes synthesis electronic properties photoluminescence

An overview on AIEgen-decorated porphyrins:Current status and applications

在线全文

学校读者我要写书评

暂无评论

聚集体(英文)

聚集体(英文) 2023年第3期4卷 55-70页

作者： Govardhana Babu Bodedla Xunjin Zhu wai-yeung wong Department of Applied Biology&Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong KongP.R.China The Hong Kong Polytechnic University Shenzhen Research Institute ShenzhenP.R.China Department of Chemistry Hong Kong Baptist UniversityHong KongP.R.China

One of the major obstacles of porphyrins is the aggregation-caused quenching(ACQ)of photoluminescence due to the strong intermolecularπ–πinteraction of the planar porphyrin core in the solid ***,ACQ leads to the nonradiative deactivation of the photoexcited states which results in short-lived charge-separated states and thus low photoluminescence and singlet quantum *** phenomenon would limit the utilization of porphyrins in near-infrared fluorescent bioimaging,photodynamic therapy,photocatalytic hydrogen evolution,electrochemiluminescence,and chiroptical ***,to address the ACQ property of porphyrins and enhance the performance of the above applications,a limited number of AIEgen-decorated porphyrins have been designed,synthesized,and tested for their *** has been found that the introduction of AIEgens,such as tetraphenylethylene,diphenylacrylonitrile,(3,6-bis-(1-methyl-4-vinylpyridinium)-carbazole diiodide,and iridium motif into the porphyrin core,transformed the porphyrins from ACQ to aggregation-induced emission(AIE)in their solid state due to the reduced strong intermolecularπ–πstacking of ***,such porphyrins containing AIE features are employed as potential candidates in the above-mentioned *** this review,we summarize the AIEgen-decorated porphyrins which have been published to date,and also discuss the benefits of converting porphyrins from ACQ to AIE for enhanced performance within each *** far as we know,there is no review that summarizes the structures and applications of AIEgen-decorated porphyrins to ***,we presume that this review would be helpful to design more efficient AIEgen-decorated porphyrins for a wide range of applications in the future.

关键词： aggregation-caused quenching aggregation-induced emission AIE luminogen FRET and solid state emission porphyrin

Steering S-scheme charge transfer via interfacial dipoles induced by amine-containing polyelectrolytes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2023年第7期66卷 2098-2108页

作者： Tao Li Chuang Feng Biquan Xiong Xuhui Zhu Zhicai He wai-yeung wong Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSchool of Material Science and EngineeringSouth China University of TechnologyGuangzhou 510640China Department of Applied Biology&Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHung HomHong KongChina

The lack of a robust interfacial driving source over multicomponent photocatalysts is an essential contributor to the sluggish spatial charge transfer across the heterointerface and severe carrier recombination,thereby rendering maneuvering charge transfer of composite materials a thorny ***,we demonstrate an electric dipole moment-driven charge transfer photosystem utilizing amine-containing polyfluorene polyelectrolyte(i.e.,PFN)and inorganic semiconductor matrices(i.e.,WO_(3))as the building blocks to direct the interfacial charge transfer,effectively targeting the photoexcited charge carriers to the active *** results and theoretical simulations reveal that the electronic coupling interaction between the pendant electron-rich amine groups along the PFN backbone and WO_(3)surface enables the nonuniform charge distribution at the interface over the WO_(3)@PFN heterojunction,which ultimately fosters the formation of interfacial dipoles oriented from conjugated macromolecular backbone of PFN to the surface of WO_(3)*** interfacial dipoles with excellent charge transfer kinetics spontaneously activate the unidirectional and accelerated S-scheme charge motion from the WO_(3)framework to the conjugated chain of PFN due to the suitable band offsets at the interface,thus endowing WO_(3)@PFN heterostructures with a significantly enhanced net efficiency of *** findings would provide some insights into the design of advanced heterojunction photocatalysts for solar energy conversion as well as the study of the working mechanism of polyelectrolyte interlayers in optoelectronic devices.

关键词： photocatalysis heterojunction interfacial dipole polyelectrolyte S-scheme

A novel reductive ring-opening reaction of isoxazolidine to form functionalized 1,3-aminoalcohol

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2007年第6期18卷 629-632页

作者： Wing Hong Chan Albert W.M. Lee wai yeung wong Department of Chemistry Hong Kong Baptist University Kowloog Tong Hong Kong

Reductive cleavage of the NO bond of isoxazolidine ring with catalytic hydrogenation over Raney nickel was described. Bicyclic isoxazolidines could be effectively converted into the corresponding 1,3-amino-alcohol possessing a sultone or sultam moiety with high conversion and yield when the hydrogenation was catalyzed by freshly prepared Raney nickel under a pressure of 40 psi in the presence of triethylamine.

关键词： Isoxazolidine Hydrogenation Raney nickel 1,3-Amino-alcohol

Metallated conjugation in small-sized-molecular donors for solution-processed organic solar cells

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2015年第2期58卷 347-356页

作者： Chaohua Cui Yunye Zhang Wallace C.H.Choy Hua Li wai-yeung wong Institute of Molecular Functional Materials Department of Chemistry and Institute of Advanced Materials Hong Kong Baptist University Department of Electrical and Electronic Engineering The University of Hong Kong College of Life and Environmental Sciences & Beijing Engineering Research Center of Food Environment and Public Health Minzu University of China HKBU Institute of Research and Continuing Education Shenzhen Virtual University Park

Four metallated conjugated oligothiophenes, S-1, S-2, S-3 and S-4, with platinum（II） aryleneethynylenes as the electron-rich building block were synthesized to investigate their physicochemical and photovoltaic properties. These small molecules possess fairly low-lying HOMO energy levels which match with the LUMO energy level of the electron acceptor PC70BM （[6,6]-phenyl-C71-butyric acid methyl ester）. Using the simple process of spin-coating solution fabrication technique, S-I：PC70BM （1：4, w/w） based organic solar cells exhibiting a high Voc of 0.913 V, with a PCE value of 0.88% were developed. In contrast, the OSC device based on S-2：PC70BM （3：7, w/w） displayed a higher PCE of 1.59% with a higher Jsc value of 5.89 mA cm^-2. The device based on S-4：PCToBM （1：4, w/w） exhibited a PCE value of 1.56%, with a Voc of 0.917 V.

关键词： platinum acetylide photovoltaics organic solar cell oligothiophene