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国家自然科学基金(20974046)

作品数:16 被引量:80H指数:6
相关作者:黄维密保秀高志强廖章金王旭鹏更多>>
相关机构:南京邮电大学台湾交通大学福建师范大学更多>>
发文基金:国家自然科学基金国家重点基础研究发展计划教育部“新世纪优秀人才支持计划”更多>>
相关领域:理学电气工程电子电信一般工业技术更多>>

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16 条 记 录,以下是 1-10
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基于含硫席夫碱衍生物的荧光增强型Hg2+探针被引量:2
2014年
文中设计合成了新的含硫原子的席夫碱(Schiff base)衍生物CzSB,该化合物可以作为荧光增强型Hg2+探针。通过紫外-可见光吸收光谱和荧光发射光谱研究了探针CzSB对Hg2+的响应过程,Hg2+的加入显著增强探针的荧光发射。探针CzSB对金属离子的识别作用和竞争选择能力也经由荧光光谱进行了研究,结果表明该探针对Hg2+具有较高的选择响应性并且不受其他常见金属离子的干扰。初步探讨了该探针分子与Hg2+的结合模式和荧光增强机理,Job曲线表明探针CzSB与Hg2+以1∶2计量比配位。
翁洁娜梅群波蒋渊知张彬宋娟凌启淡范曲立黄维
关键词:席夫碱
Room-Temperature NH3 Gas Sensor Based on Hydrothermally Grown ZnO Nanorods被引量:1
2011年
A NH_(3) gas sensor based on a ZnO nanorod array is fabricated by hydrothermal decomposition on a Au electrode.The as-grown ZnO nanorods have uniform diameter distribution and good crystal structure,shown by scanning electron microscopy,x-ray diffraction,high resolution transmission electron microscopy and photoluminescence emission characterizations.The gas sensing results show that the ZnO nanorod-based device responds well to ammonia gas at room temperature(sensitivity𝑆is about 8).
WEI AngWANG ZhaoPAN Liu-HuaLI Wei-WeiXIONG LiDONG Xiao-ChenHUANG Wei
关键词:NANORODSAMMONIA
小分子有机电致发光器件和材料的研究及应用被引量:8
2011年
有机电致发光器件(OLED)是在电场作用下,以有机材料为活性发光层的器件。由于OLED具有亮度高、响应快、视角宽、工艺简单、可柔性等优点,在现代科学研究及技术应用中备受关注。其商业化应用,诸如平板显示(FPD)和固体照明(SSL)等,正在不断向前推进。本文综述了小分子OLED的各种器件结构和功能材料研究进展以及该领域存在的问题和挑战。在器件结构方面,着重介绍了每种器件的结构及相关工作原理、并对其性能进行讨论。包括:掺杂或主体发光器件;单层、双层、三层及多层器件;白光器件。继而介绍了OLED功能材料的一般研究方法,OLED中典型功能材料的结构和特点,以及器件性能。这些功能材料包括:空穴传输、电子传输、红光、绿光、蓝光、掺杂磷光的主体、界面修饰等材料。文章最后提出了小分子有机电致发光器件在技术方面存在的主要问题和挑战,并对其未来发展方向做了简单讨论。
密保秀王海珊高志强王旭鹏陈润锋黄维
关键词:平板显示固体照明功能材料
小分子铱配合物及其电致发光被引量:15
2011年
由于磷光金属配合物可以同时利用单线态和三线态激子发光,使有机电致发光器件的理论内量子效率达到100%,突破了25%的极限。因而以磷光金属配合物为发光材料制成的器件备受关注。在这些金属配合物中,铱配合物由于具有较强的发光特性、发光波长可调性、较好的热稳定性和电化学稳定性以及能够形成便于蒸镀的中性分子,而成为最有应用潜力的电致磷光材料。本文综述了近几年铱配合物磷光材料在分子设计与合成方法、发光机理及器件构筑等方面的研究进展。特别介绍与讨论了磷光铱配合物的两种发光机理,即基于同配体铱配合物或异配体铱配合物的主配体到中心金属离子的电荷转移三线态(3MLCT)发射和基于异配体铱配合物的辅助配体三线态(3LC)发射。根据反应条件的差异,归纳总结了合成铱配合物常用的4种方法以及合成fac式和mer式的铱配合物的方法。还根据材料的发光颜色及其电致发光的不同,对磷光铱配合物材料进行了分类与讨论。此外,简要介绍了用于器件制作的主体材料。最后,展望了金属有机配合物电致磷光材料的发展前景,并提出了今后磷光材料的发展方向。
廖章金朱彤珺密保秀高志强范曲立黄维
关键词:铱配合物发光机理有机发光二极管
Recent progress in the numerical modeling for organic thin film solar cells被引量:6
2011年
Device modeling is constructive in finding the dependency of devices efficiency on structure parameters and material properties. For the sake of looking into the physics mechanism of organic solar cells (OSCs), as well as predicting their maximum attainable efficiency, numerical modeling is widely utilized to simulate the behavior of OSCs. Although some indispensable parameters are neglected or hypothesized because of inexplicitness in simulation models for OSCs, numerical modeling can describe the kinetic process in OSCs intuitively. This paper summarizes the optical/electrical models in the BHJ solar cell, as well as addresses their corresponding development in recent years on the basis of device physics and its working principle. Applications of numerical modeling and comments on modeling results are summarized. Meanwhile, precision and open questions about every model are discussed.
ZHAO XinYanMI BaoXiuGAO ZhiQiangHUANG Wei
Synthesis,characterization and applications of vinylsilafluorene copolymers:New host materials for electroluminescent devices被引量:2
2010年
Vinylsilafluorene(VSiF) was successfully synthesized and copolymerized with vinylcarbazole and methyl methacrylate via free radical copolymerization for the first time.The synthesis,photophysical properties,computational modeling studies,and organic light-emitting devices of the VSiF copolymers were presented.The good coordinated photoluminescent(PL) spectra with the absorption of blue light-emitting materials and the high energy band-gap of the VSiF copolymers were observed.Higher triplet band gap(3Eg) to host the blue phosphorescent emitters and better HOMO and LUMO than PVK for electron and hole injection and transportation of the VSiF model compounds were revealed by density functional theory(DFT) calculations.The preliminary device results in applications of these copolymers as host materials for green phosphorescent emitters demonstrate the copolymers of VSiF and vinylcarbazole have comparable device performance of polyvinylcarazole(PVK),suggesting a bright future of VSiF as building blocks for host materials.
CHEN RunFengZHU RuiZHENG ChaoFAN QuLiHUANG Wei
Nitrogen-doped carbon nanotube/polyaniline composite:Synthesis, characterization, and its application to the detection of dopamine被引量:4
2011年
Nitrogen-doped carbon nanotubes (N-CNTs)/polyaniline (PANI) composites are developed as an electrode material for biosensors. The morphology, composition, and optical properties of the resulting products were characterized by transmission electron microscopy (TEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), and ultraviolet-visible absorption spectra (UV-vis). Furthermore, N-CNTs/PANI composite was immobilized on the surface of a glassy carbon electrode (GCE) and applied to construct a sensor. The obtained N-CNTs/PANI-modified GCE showed one pair of redox peaks and high catalytic activity for the oxidation of dopamine (DA) in a neutral environment. Differential pulse voltam-mograms results illustrate that the fabricated DA biosensor has high anti-interference ability towards ascorbic acid (AA). In addition, the fabricated biosensor showed superior performances with two wide linear ranges from 1 to 80 μM and from 1.5 to 3.5 mM and a low detection limit of 0.01 μM.
FENG XiaoMiaoLI RuiMeiMA YanWenCHEN RunFengMEI QunBoFAN QuLiHUANG Wei
关键词:POLYANILINEDOPAMINE
Carbon-nitrogen/graphene composite as metal-free electrocatalyst for the oxygen reduction reaction被引量:11
2011年
Sheet-like carbon-nitrogen (CNx)/graphene composites with a high content of nitrogen (x≤0.15) was prepared by the carbonization of polypyrrole (PPy)/reduced-graphene-oxide (rGO) composite at 600-800°C. We used rGO instead of graphene oxide (GO) sheets as a template and a substrate to immobilize PPy since the PPy/GO composite agglomerates easily because of the dehydration of excess oxygen-containing groups on the GO sheets during the drying process. The dried PPy/rGO intermediate and its derived CNx/graphene products retain their high dispersion and loose-powder features. The as-prepared CNx/graphene composites have a total nitrogen content of about 10 at% and their nitrogen state is mainly of pyridinic and graphitic type. CNx/graphene composites exhibit excellent performance for the oxygen reduction reaction (ORR) in terms of electrocatalytic activity, stability and immunity towards methanol crossover and CO poisoning, suggesting their potential as metal-free electrocatalysts for the ORR.
MA YanWenZHANG LingRongLIJuanJuanNI HaiTaoLI MengZHANG JinLeiFENG XiaoMiaoFAN QuLiHU ZhengHUANG Wei
关键词:氧还原反应石墨复合材料石墨氧化物总氮含量
Organic thin-film solar cells:Devices and materials被引量:9
2012年
In recent years, the performance of organic thinfilm solar cells has gained rapid progress, of which the power conversion efficiencies (r/p) of 3%-5% are commonly achieved, which were difficult to obtain years ago and are improving steadily now. The r/p of 7.4% was achieved in the year 2010, and r/p of 9.2% was disclosed and confirmed at website of Mitsubishi Chemical in April, 2011. The promising future is that the r/p of 10% is achievable according to simulation results. Apparently, these are attributed to material innovations, new device structures, and also the better understanding of device physics. This article summarizes recent progress in organic thinfilm solar cells related to materials, device structures and working principles. In the device functioning part, after each brief summary of the working principle, the methods for improvements, such as absorption increment, organic/electrode interface engineering, morphological issues, are addressed and summarized accordingly. In addition, for the purpose of increasing exciton diffusion efficiency, the benefit from triplet exciton, which has been proposed in recent years, is highlighted. In the active material parts, the chemical nature of materials and its impact on device performance are discussed. Particularly, emphasis is given toward the insight for better understanding device physics as well as improvements in device performance either by development of new materials or by new device architecture.
LI ZhiGang1, ZHAO XinYan2, LI Xin1,2, GAO ZhiQiang1, MI BaoXiu1 & HUANG Wei2 1Jiangsu Engineering Centre for Flat-Panel Displays & Solid-state Lighting and School of Materials Science & Engineering, Nanjing University of Posts & Telecommunications, Nanjing 210046, China 2Key Laboratory for Organic Electronics & Information Displays (KLOEID)
A thermal stable cathode buffer based on an inexpensive tetranuclear zinc(Ⅱ) complex for organic photovoltaic devices
2012年
An inexpensive material, i.e., tetranuclear zinc(Ⅱ) complex, (Zn40(A/D)6) [AID = 7-azaindolate], was utilized as a cathode buffer in organic photovoltaic (OPV) devices, leading to the improvement of device performance. Compared to OPV devices based on a conventional cathode buffer of TPBi (1,3,5-tris(2-N-phenylbenzimidazolyl)benzene), although the freshly prepared devices showed similar performance, when heated to a series of high temperatures under air, the short circuit current and the open circuit voltage of the Zn40(AID)6 devices dropped more slowly, indicating the superiority of using Zn40(AID)6 as a cathode buffer over TPBi in OPV devices.
LI ZhiGangGAO ZhiQiangWANG HaiShanZHANG HuiZHAO XinYanMI BaoXiuHUANG Wei
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