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Triazatruxene-containing hyperbranched polymers:Microwave-assisted synthesis and optoelectronic properties

Science China Chemistry 2010年第12期53卷 2472-2480页

作者： lai wenyong,liu dong & huang wei key laboratory for organic electronics & information displays (KLOEID) Institute of Advanced Materials (IAM),Nanjing University of Posts & Telecommunications,Nanjing 210046,China 1. key laboratory for organic electronics & information displays (KLOEID) Institute of Advanced Materials (IAM) Nanjing University of Posts & Telecommunications Nanjing 210046 China

Hyperbranched polymer structures represent a class of high-functionality building blocks with excellent three-dimensional topology for the construction of highly substituted conjugated *** this contribution,an efficient microwave synthesis protocol toward the synthesis of conjugated hyperbranched polymers is presented.A novel series of soluble hyperbranched polyfluorenes (PTF1-PTF3) incorporating triazatruxene moiety as the branch units with various branching degrees have thus been successfully constructed with good yields and high molecular weight via a facile "A2+B2+C3" *** structures of the hyperbranched polymers were confirmed by NMR and *** thermal,optical,and electrochemical properties of the hyperbranched polymers were also *** results showed that introduction of triazatruxene units into the hyperbranched structure endowed the polymer with good thermal stability and highly amorphous *** investigation of PTFx revealed strong blue emission in both solution and solid *** polymers with higher degree of branching and proper content of linear fluorene units exhibited better photophysical properties in terms of narrow emission spectra and relatively high quantum efficiency as well as improved thermal spectral *** triazatruxene branching unit also played a role in raising the HOMO energy levels relative to those of polyfluorenes that would help to improve the charge injection and transport *** incorporation of triazatruxene unit into hyperbranched polymers has thus explored an effective avenue for constructing optoelectronic polymers with improved functional characteristics.

关键词： hyperbranched polymers microwave synthesis triazatruxene polyfluorene blue emission

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Hydrogen bond-induced elastic polyzwitterion electrolytes constructed by mussel-inspired autopolymerization for zinc-ion battery

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Science China Chemistry 2024年第10期67卷 3438-3449页

作者： Shi Wang Xinyi Wu Chao liu Lingjun He Shuanghan Li Yuqi Miao Mingrui Cai Yi Li Zheng-dong huang Wen-Yong lai State key laboratory of organic electronics and information displays(SKLOEID) Institute of Advanced Materials(IAM)School of Chemistry and Life SciencesNanjing University of Posts&TelecommunicationsNanjing 210023China

Aqueous zinc-ion batteries(ZIBs)have attracted much interest to realize safe rechargeable batteries with high safety and high energy ***,it is still challenging to address dendrite growth and parasitic reactions in zinc *** propose herein the design concept of hydrogen bond-induced elastic polyzwitterion electrolytes with zincophilic groups for achieving robust ***-inspired autopolymerization has been developed to construct the polyzwitterion electrolytes at room temperature by inducing electron density delocalization atα-position of C=C bond in zwitterion monomer by Zn^(2+).Specifically,the zwitterionic functional groups construct ion transport channels,and the unique–NH–and SO_(3)^(-)groups co-compete with H_(2)O for coordination with Zn^(2+)and promote the desolvation of hydrated Zn^(2+),thus achieving a high room temperature ionic conductivity(6.7 mS cm^(-1))and an increased Zn^(2+)migration number(0.65)for the polyzwitterion *** addition,various interactions such as hydrogen bonding and electrostatic interactions between electrolyte ions and zwitterionic groups impart high stretchability and strength to the polyzwitterion electrolytes,which,combined with SO_(3)^(-)philic(002)crystallographic properties,effectively inhibit the growth of zinc *** a result,rigid/wearable solid-state ZIBs exhibit excellent cycling and C-rate *** believe that the strategy of constructing polyzwitterionic electrolytes with zincophilic groups and ion transport channels opens up a new direction in polymer electrolyte engineering towards safe and high energy batteries.

关键词： flexible electronics wearable electronics polyzwitterion electrolytes self-polymerization zinc-ion batteries

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A Rapid Synthesis of High Aspect Ratio Silver Nanowires for High-Performance Transparent Electrodes

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中国化学:英文版 2015年第1期33卷 147-151页

作者： Tao Cheng Yizhou Zhang wenyong lai Yao Chen wei huang key laboratory for organic electronics&information displays(KLOEID) Institute of Advanced Materials(IAM)Nanjing University of Posts and TelecommunicationsNanjingJiangsu 210023China

A rapid,simple and cost-effective polyol method has been developed for the synthesis of silver nanowires with high aspect ratio and high *** aspect ratios of the silver nanowires as high as ca.1000(average length 40μm and some even as long as 80μm,diameter 50-100 nm)were obtained via optimizing the reaction *** electrodes with excellent optoelectronic performances(optical transmittance of 90%,sheet resistance of 23.2Ω/□and optical transmittance of 87%,sheet resistance of 19.7Ω/□)comparable to commercial ITO were fab-ricated via simple spin coating the resulting silver nanowires onto the glass *** high optoelectronic per-formances and the facile all-solution process of the as-prepared transparent electrodes render them rather promising candidates for use in cost-effective large-area optoelectronic devices.

关键词： silver nanowires transparent electrodes high aspect ratio all-solution process large-area electronics

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Paper-based all-solid-state flexible asymmetric micro-supercapacitors fabricated by a simple pencil drawing methodology

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Chinese Chemical Letters 2018年第4期29卷 587-591页

作者： Lanqian Yao Tao Cheng Xiaoqin Shen Yizhou Zhang wenyong lai wei huang key laboratory for organic electronics and information displays (KLOEID) Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts & Telecommunications Nanjing 210023 China Shaanxi Institute of Flexible electronics (SIFE) Northwestern Polytechnical University (NPU) Xi'an 710072 China

Flexible micro-scale energy storage devices as the key component to power the flexible miniaturized electronic devices are attracting extensive attention. In this study, interdigitated asymmetric all-solidstate flexible micro-supercapacitors（MSCs） were fabricated by a simple pencil drawing process followed by electrodepositing MnO_2 on one of the as-drawn graphite electrode as anode and the other as *** as-prepared electrodes showed high areal specific capacitance of 220 μF/cm^2 at 2.5 μA/cm^2. The energy density and the corresponding power density of the resultant asymmetrical flexible MSCs were up to 110 μWh/cm^2 and 1.2 μW/cm^2, respectively. Furthermore, excellent cycling performance（91% retention of capacity after 1000 cycles） was achieved. The resultant devices also exhibited good electrochemical stability under bending conditions, demonstrating superior flexibility. This study provides a simple yet efficient methodology for designing and fabricating flexible supercapacitors applicable for portable and wearable electronics.

关键词： Flexible electronics Flexible supercapacitors Micro-supercapacitors Paper-based electronics Pencil drawing Flexible electronics Flexible supercapacitors Micro-supercapacitors Paper-based electronics Pencil drawing

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Inkjet printed large-area flexible circuits:a simple methodology for optimizing the printing quality

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Journal of Semiconductors 2018年第1期39卷 224-231页

作者： Tao Cheng Youwei Wu Xiaoqin Shen wenyong lai wei huang key laboratory for organic electronics and information displays (KLOEID) & Institute of Advanced Materials (IAM) JiangsuNational Synergetic Innovation Center for Advanced Materials(SICAM) Nanjing University of Posts & Telecommunications Shaanxi Institute of Flexible electronics(SIFE) Northwestern Polytechnical University (NPU)

In this work, a simple methodology was developed to enhance the patterning resolution of inkjet printing, involving process optimization as well as substrate modification and treatment. The line width of the inkjetprinted silver lines was successfully reduced to 1/3 of the original value using this methodology. Large-area flexible circuits with delicate patterns and good morphology were thus fabricated. The resultant flexible circuits showed excellent electrical conductivity as low as 4.5 Ω/□ and strong tolerance to mechanical bending. The simple methodology is also applicable to substrates with various wettability, which suggests a general strategy to enhance the printing quality of inkjet printing for manufacturing high-performance large-area flexible electronics.

关键词： inkjet printing flexible circuits patterning resolution large-area electronics flexible electronics

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Synthesis, Structural Characterization and Reactivity of a Bis（phosphine）（silyl） Platinum（ll） Complex

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Chinese Journal of Chemistry 2015年第10期33卷 1206-1210页

作者： Yonghua Li Wenjin Zeng wenyong lai Shigeru Shimada Shi Wang Lianhui Wang wei huang key laboratory for organic electronics and information displays & Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (S1CAM) Nanjing University of Posts & Telecommunications Nanjing Jiangsu 210023 China Research Institute for Innovation in Sustainable Chemistry National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Central 5 l-l-l Higashi Tsukuba Ibaraki 305-8565 Japan

Treatment of 1,2-C6H4（SiH3）（SiH3）（1） with Pt（dmpe）（PEt3）2 （dmpe=Me2PCHeCH2PMe2） in the ratio of 1 ： 1 leads to the complex {1,2-C6H4（SiH2）（SiH2）}PtH （dmpe）（2）, which can react with proton organic reagent bearing hydroxy group with low steric hindrance to form a tetra-alkoxy substituted silyl platinum（II） compound （3）. Com- pounds 2 and 3 are the very rare examples of silyl transition-metal complexes derived from this chelating hydrosi- lane ligand. To the best of our knowledge, there are only 6 examples of silyl metal complexes prepared from this ligand with such structural features registered in the Cambridge Structural Database, among them, only one silyl platinum（II） compound is presented. The structures of complexes 2 and 3 were unambiguously determined by mul- tinuclear NMR spectroscopic studies and single crystal X-ray analysis.

关键词： silyl chelating platinum multinuclear NMR

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White Electroluminescence with Simultaneous Three-Color Emission from a Four-Armed Star-Shaped Single-Polymer System

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Chinese Journal of Chemistry 2015年第8期33卷 873-880页

作者： Yuanda Jiu Jianyun Wang Chengfang liu wenyong lai Lingling Zhao Xiangchun Li Yi Jiang weidong Xu Xinwen Zhang wei huang key laboratory for organic electronics and information displays & Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced Materials Nanjing University of Posts & Telecommunications Nanjing Jiangsu 210023 China key laboratory of Flexible electronics & Institute of Advanced Materials Jiangsu National Synergetie innovation Center for Advanced Materials Nanjing Tech University Nanjing Jiangsu 211816 China

A four-armed star-shaped single-polymer system with 4,7-bis（5-（4-（9H-carbazol-9-yl）phenyl）-4-hexylthio- phen-2-yl）benzo[c][1,2,5]thiadiazole （FTBT） as a red emissive core, polyfluorene （PF） as blue emissive arms and 1,3-benzo thiadiazole （BT） as green emissive dopants was designed and synthesized, in which red, green, and blue （RGB） emission balance can be achieved by adjusting the doping concentration of FTBT and BT discreetly. A typ- ical single-emissive-layer device （ITO/PEDOT：PSS/polymer/TPBI/LiF/Al） was studied and discussed, realizing a pure and stable white emission with a luminous efficiency （LE） of 1.59 cd·A^-1 and CIE coordinates of （0.31, 0.34）. The high-color-quality white electroluminescence of the devices could be mainly attributed to the suppressed in- termolecular interactions, and partial energy transfer from the blue PF arms to the red and green dopants.

关键词： white electroluminescence hyperbranched polymers multi-armed structures Forster resonance energy transfer organic light-emitting diodes

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Reductive ionic liquid-mediated crystallization for enhanced photovoltaic performance of Sn-based perovskite solar cells

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Science China Chemistry 2022年第10期65卷 1895-1902页

作者： He dong Chenxin Ran Wangyue Li Xin liu weiyin Gao Yingdong Xia Yonghua Chen wei huang Frontiers Science Center for Flexible electronics Xi’an Institute of Flexible Electronics(IFE)and Xi’an Institute of Biomedical Materials&EngineeringNorthwestern Polytechnical UniversityXi’an 710072China key laboratory of Flexible electronics(KLOFE)&Institution of Advanced Materials(IAM) Nanjing Tech University(NanjingTech)Nanjing 211816China key laboratory for organic electronics&information displays(KLOEID) and Institute of Advanced Materials(IAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China

Tin(Sn)-based perovskite solar cells(PSCs)have recently made inspiring progress,and certified power conversion efficiency(PCE)has reached impressive value of 14.8%.However,it is still challenging to realize efficient and stable 3D Sn-based PSCs due to the fast crystallization and easy Sn^(2+)oxidation of Sn-based ***,we reported the utilization of a reductive ionic liquid,methylamine formate(MAFa),to drive the controlled crystallization process and suppress Sn^(2+)oxidation of FASnI_(3)perovskite *** coordination of C=O and Sn^(2+)and the hydrogen bonding of N-H···I between the MAFa and FASnI_(3)precursors are shown to be responsible for retarding the crystallization of FASnI_(3)during film-forming process,which promotes the oriented growth and reduced defect traps of the ***,the strong reducibility of–CHO groups in Fa−suppresses the oxidation of Sn^(2+)in the *** a result,MAFa-modified 3D PSCs device could reach champion PCE of up to 8.50%,which is enhanced by 26.11%compared to the control device with PCE of 6.74%.Most importantly,the MAFa-modified device shows much improved stability compared to the control device under same conditions without *** work adds key building blocks for further boosting the PCE and stability of Sn-based PSCs.

关键词： 3D Sn-based perovskite solar cells ionic liquid retarded crystallization suppressed Sn^(2+)oxidation

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Two-dimensional molecular crystalline semiconductors towards advanced organic optoelectronics

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Nano Research 2022年第10期15卷 9554-9572页

作者： Xuemei dong Heshan Zhang Yinxiang Li Bin liu keyuan Pan Yijie Nie Mengna Yu Mustafa Eginligil Juqing liu wei huang key laboratory of Flexible electronics(KLOFE)&Institute of Advanced Materials(IAM) Nanjing Tech University(Nanjing Tech)Nanjing 211816China Center for Molecular Systems and organic Devices(CMSOD) State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM)Nanjing University of Posts&TelecommunicationsNanjing 210023China Frontiers Science Center for Flexible electronics Xi’an Institute of Flexible Electronics(IFE)and Xi’an Institute of Biomedical Materials&EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

The compelling demand for higher performance and lower cost in the optoelectronics industry has driven the development of organic *** crystalline semiconductors(MCSs),especially two-dimensional MCSs(2D-MCSs),possess intrinsic ordered structure,quantum confinement effect,high mobility,unique optical and electrical properties,and more ecological and cheaper production,which make great promises in high-performance optoelectronic *** we provide a review of design principles and synthetic strategies for 2D-MCS materials,exploiting their potential as a revolution option in associated optoelectronic *** merits and limitations of each strategy are presented,and these molecular crystals are considered as a competitive choice for emerging semiconducting materials in information ***,the current challenges and future perspectives in this field are also elaborated.

关键词： two-dimensional molecular crystalline semiconductors(2D-MCSs) molecular design strategies preparation techniques photoelectronic applications

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Stable and Efficient Red Perovskite Light-Emitting Diodes Based on Ca^(2+)-Doped CsPbI_(3)Nanocrystals

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Research 2021年第1期2021卷 1192-1202页

作者： wei Shen Jianbin Zhang Ruimin dong Yanfeng Chen liu Yang Shuo Chen Zhan Su Yujun Dai Kun Cao Lihui liu Shufen Chen wei huang State key laboratory of organic electronics and information displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&Telecommunications9 Wenyuan RoadNanjing 210023China Frontiers Science Center for Flexible electronics(FSCFE) MIIT Key Laboratory of Flexible Electronics(KLoFE)Northwestern Polytechnical UniversityXi’an 710072China

α-CsPbI_(3)nanocrystals(NCs)with poor stability prevent their wide applications in optoelectronic ***^(2+)(1.00Å)as a new B-site doping ion can successfully boost CsPbI_(3)NC performance with both improved phase stability and optoelectronic *** a Ca^(2+)/Pb^(2+)ratio of 0.40%,both phase and photoluminescence(PL)stability could be greatly *** by increased tolerance factor,the cubic phase of its solid film could be maintained after 58 days in ambient condition or 4 h accelerated aging process at 120℃.The PL stability of its solution could be preserved to 83%after 147 days in ambient *** using UV light to accelerate aging,the T50 of PL could boost 1.8-folds as compared to CsPbI_(3)*** Ca^(2+)doping can dramatically decrease defect densities of films and reduce hole injection barriers,the red light-emitting diodes(LEDs)exhibited about triple enhancement for maximum the external quantum efficiency(EQE)up to 7.8%and 2.2 times enhancement for half-lifetime of LED up to 85 *** believe it is promising to further explore high-quality CsPbI_(3)NC LEDs via a Ca^(2+)-doping strategy.

关键词： properties ambient maintained

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