MOPc/DEH双组分单层结构有机光导器件的制作及其光电特性

制作了由金属酞菁、腙和高分子成膜剂组成的单层有机光导器件,测试了单层光导器件的光电性能参数,实验结果表明,这种单层光导器件对白光最敏感,可进行正负性充放电,有优异的光电性能.本文还探讨了MOPc/DEH双组分单层光导器件的电荷传输机理.     

有机智能传感材料与器件研究进展

有机光电子材料具有柔性、低成本、可大面积加工以及分子结构可调等特点,在可穿戴智能器件领域具有巨大的应用潜力.有机分子可以通过结构的设计调节其光学、电学、机械和化学等特性,从而实现丰富的传感功能.有机智能传感器具有快速响应、高选择性、高灵敏和机械柔性等优势,被广泛应用于环境监测、电子皮肤、医疗监测、人机交互等智能感知领域.本文综述了近年来有机智能传感材料与器件的研究进展,包括小分子半导体、聚合物半导体和导电聚合物等有机传感材料,以及化学传感器、温度传感器、光学传感器和机械传感器等有机智能传感器件的前沿应用,重点介绍了目前生物传感器、仿生传感器等智能感知器件和系统的发展现状,并对其未来发展过程中面临的挑战进行了分析.     

静电复印用双偶氮颜料的研究

合成了含邻氯双偶氮颜料,借助元素分析、红外光谱、吸收光谱、X射线粉末衍射等对其结构与性能进行了表征,并制成了功能分离型结构的有机光导器件。光电特性显示,该器件对可见光有很好的敏感性,是一种良好的静电复印用有机光导材料。     

全国第五届有机固体电子过程学术讨论会征文通知

中国化学会有机固体专业委员会主办的“全国第五届有机固体电子过程学术讨论会”拟于2000年10月底在南京举行。会议由南京大学化工学院高分子科学与工程系承办。1会议内容:(1)分子晶体和分子器件;(2)导电聚合物;(3)有机非线性光学材料;(4)有机铁磁体;(5)有机光导材料;(6)...     

聚合物在纳米半导体材料中的应用

半导体纳米材料在光、电、磁、催化等方面具有不同于本体的一系列特性。在纳米材料及其器件制备中，聚合物有着重要的应用。它不仅可以有效地稳定纳米晶粒尺寸，而且可以钝化表面，增强纳米微粒的发生效果。而纳米半导体对光导聚合物的光电行性也有增强作用。将电致发光聚合物与纳米半导体微粒组合而成双层异质结FL器件，可提高器件效率和寿命，甚至可以构成光导与电致发光双功能器件。     

水/醇溶共轭聚合物界面材料及其在光电器件中的应用

相对于传统的无机半导体器件,以有机半导体(特别是聚合物半导体)材料为基础的有机光电器件,可采用与传统印刷技术(例如喷墨打印、卷对卷印刷等)相结合的溶液加工方式制备低成本、大面积、柔性光电器件,因而成为广泛关注的焦点,并得到了快速发展.实现溶液加工的高效有机光电器件的一个关键问题是界面问题——如何避免溶液加工时有机层间的互溶以及如何实现可印刷稳定金属电极的高效电子注入等.水/醇溶性共轭聚合物的迅速发展为解决溶液加工多层有机光电器件所面临的界面问题提供了有效手段.研究发现,水/醇溶共轭聚合物不但可以有效避免溶液加工多层器件中的界面互溶,而且还可与高功函数的稳定金属发生界面偶极相互作用而增强其电子注入,从而解决了高功函数稳定金属电子注入的难题,为实现全溶液加工的高效印刷有机光电器件提供了可行的方案.本文介绍了近年来本课题组在水/醇溶共轭聚合物阴极界面材料及器件应用方面的研究进展,并对水/醇溶共轭聚合物阴极界面材料在聚合物发光二极管和聚合物太阳电池中的工作机理进行了探讨.     

水溶性共轭聚合物研究与应用进展

近年来,在水溶性共轭聚合物(CPs)方面的研究备受瞩目,由于它包含了聚合物共轭主链良好的光电性质的同时还兼具了良好的水溶性,因此在光电功能信息器件中有着特殊的应用,并显著地推动了包括生物传感、电致发光器件、太阳电池和场效应晶体管等有机光电子材料及其器件的发展.本文对近几年来水溶性CPs的合成及其应用进展做出简要的总结,...     

有机光导器件用聚酯成膜剂的合成及表征

以对苯二甲酸、间苯二甲酸、新戊二醇及1，6-己二醇为原料进行四元共缩聚反应，得到聚酯型树脂。利用^1H核磁共振谱测定聚酯中各组分含量，测试了聚酯的耐磨性，并用合成的聚酯与聚碳酸酯共混制备光导器件，利用SP-428型静电纸分析仪测试光导器件的光电性能。实验结果表明由聚酯和聚碳酸酯共混物制备的有机光导器件能有效地防止光疲劳现象。     

三苯胺亚乙基聚合物的制备及其物理性质的研究

从三苯胺和 1 ,2 -二溴乙烷制备了三苯胺亚乙基低分子量聚合物 (简称三苯胺聚合物 ) ,通过质谱表征 ,最大分子量的聚合物的链节数为 5 ,并对该聚合物进行了热重分析、紫外光谱和荧光光谱的分析 ,以及以此聚合物为载流子传输材料、酞菁氧钛为载流子产生材料制备了光导器件 ,测量了该光电器件的光电性质 ,显示出良好的光电性能 ( E1 / 2 =0 .5 lx.s)。该光电性能与目前激光打印机中所用的传输材料腙的光电性能相当 ,可以作为替代腙在打印机中使用。     

前言

有机材料通常被认为是绝缘体,但是自从20世纪50年代发现有机色素的半导体特性以来,有机半导体材料的相关研究逐渐兴起.1963年,纽约大学的Pope等利用蒽单晶制备了单层有机电致发光器件,但是起亮电压高,器件性能很差;1970年,美国IBM公司首先将有机光导材料（聚乙烯咔唑/三硝基芴酮）用于复印机的感光鼓,实现了有机半导体材料最早的应用;1987年,     

Polymer network as a template for control of photoconductivity of a liquid crystal semiconductor

We report a novel method of confining a photoconducting liquid crystalline material using a polymer templating approach. The attractive feature of this approach is that the magnitude of the photocurrent of the photoconducting material does not diminish, i.e. it is unaltered by the polymer matrix. The results are compared with another method of encapsulation that was recently reported and wherein the photoconductivity decreases upon having the photoconducting material in the polymer matrix. The difference in the behaviour between the two methods is explained using a nanophase segregation model. The method described is particularly suitable for creating patterned photoconductors.     

Electric Conductivity of Sandwich Structures with Films of Poly-N-epoxypropylcarbazole Doped with Organic Dyes of Various Ionicity

The conducting characteristics of samples of a sandwich structure with films based on the photoconducting polymer poly-N-epoxypropylcarbazole doped with cationic, anionic, cationic–anionic, neutral, and bipolar organic dyes were investigated. It was shown that the conductivity of the samples is caused by ion drift, thermofield generation of holes from uncontrollable impurity centers, thermofield generation of electrons and holes from the dopant molecules, and thermofield injection of electrons and holes from the electric contacts. The contribution from the injection currents of the charge carriers increases in the transition from a cationic dye to anionic, cationic–anionic, and intraionic dyes.     

Electrical conductivity,photoconductivity, and optical properties of poly(1,4‐diaminoanthraquinone) organic semiconductor for optoelectronic applications

The electrical conductivity and optical properties of the poly(1,4‐diaminoanthraquinone) [poly(1,4‐DAAQ)] have been investigated. The electrical conductivity of the polymer increases with temperature and room temperature conductivity was found to be 2.68 10^?5 S cm^?1. The optical band gap of the polymer is 1.87 eV due to the direct optical transitions. The photoconductivity of the polymer is higher than that of dark conductivity. When the light is switched on, the resistance decreases abruptly and when it is switched off, the resistance increases. This confirms that the polymer is a photoconductive material. The obtained results indicate that the poly(1,4‐DAAQ) is a photoconducting organic semiconductor with photovoltaic and dark current properties. Copyright © 2008 John Wiley & Sons, Ltd.     

Synthesis,Photoconductivity and Electro-optical Properties of Disperse Red-1 Bonded PVK

Polyvinylcarbazole was chloromethylated then condensed with Na salt of Disperse Red-1. The produced new polymer.,Disperse Red-1 bonded HVK(PVK-DR1) was characterized. The photoconductivity and electro-optical coefficient were measured using a thin film fabricated from the polymer. The result shows that the film is photoconducting electro-optical active. The photoconductivity is electric field dependent. When the applied voltage was 100 to 200 mV/M, the pholocurrent was 1 to 188 nA, and photoconductivity was 6 to 241×10^-13S·cm^-1, quantum efficient was 0.18% to 5%. Electro-optical efficient was 1.3 pm/V.     

Ferroelectric Polymer Nanotubes with Large Dielectric Constants for Potential All‐Organic Electronic Devices

To fabricate ferroelectric ultrathin polymer films with large dielectric constants for potential all‐organic electronic devices, ferroelectric polymer nanotubes and a composite of the nanotubes with a dispersed organic semiconductor have been fabricated by template‐assisted methods. The ferroelectricity drops markedly in spin‐coated ultrathin films less than 100 nm thick, whereas P(VDF‐TrFE) nanotubes with a wall thickness of a few ten nm sustain ferroelectricity. The composite nanotubes exhibit a giant dielectric constant as a result of significantly enhanced interface polarization between the nanosized fillers and the polymer matrix. They could be of practical use in supercapacitors, optoelectronic devices, and sensors.

     

Physicochemical characteristics of the reaction of vapors of organic liquids with divinyl-styrene and isoprene polymer films of piezoelectric chemical sorption sensors

The reaction of vapors of organic liquids with films of carbon-chain polymers was studied on piezoelectric quartz resonators. Physicochemical characteristics of sorption processes in the system vapor-film sorbent were determined in the region obeying Henry’s law. It was concluded that divinyl-styrene polymer can be used in piezoelectric chemical sensors for environmental control of trace organic toxicants.     

In-situ characterization of thin polymer films for applications in chemical sensing of volatile organic compounds by spectroscopic ellipsometry

Polymer coatings are applied in many kinds of chemical sensors. The interaction with organic vapours changes the physical properties of the coating material. For optical sensors, changes in the coating volume and the complex refractive index are most important. Spectroscopic ellipsometry has been applied for the first time to the in-situ characterization of thin poly(dimethylsiloxane) films in contact with tetrachloroethene, toluene and cyclohexane vapours. The differences in bulk refractive index between organic solvent and polymer are large for toluene and tetrachloroethene and both effects were studied separately. Cyclohexane has a bulk refractive index very close to the investigated poly(dimethylsiloxane) films. Therefore the calculation of the volume fraction of the analyte in the mixture phase with the polymer is subject to large errors for vapour concentrations below 5000 ppm. Received: 8 December 1995 / Revised: 5 March 1996 / Accepted: 6 March 1996     

Dual potentiometric and UV/Vis spectrophotometric disposable sensors with dispersion cast polyaniline

Simple conducting polymer–polyaniline-based sensors/biosensors, working either in potentiometric or UV/Vis spectrophotometric mode, are proposed. Disposable sensors were produced by coating polyaniline layers, cast from aqueous dispersion of the polymer nanoparticles, on a transparent plastic polyacetate foil. In the potentiometric mode, polyaniline layers are sensitive to a number of metal cations, while in UV/Vis mode, changes of absorbance were recorded only in case of a chemical reaction of cations with the polymer. Pronounced sensitivity of tested sensors to ammonia was used for potentiometric/spectrophotometric biosensing purposes studied on a model example of urease-based sensors of urea. The highest sensitivity and reproducibility of such sensors were observed in urea concentration ranging from 1 to 10 mM.     

Porous Organic Polymer Nanoparticles for Sensing of Unsaturated Hydrocarbons

The design and synthesis of porous organic polymers for the potential application in chemical sensors remains a huge challenge nowadays. Herein, a porous organic polymer possessing tetrazole groups(TTZ-3) was synthesized via simple Schiff base chemical reaction. Thermogravimetric analysis(TGA), Fourier transform infrared spectrometer(FTIR), solid-state¹³C cross polarization/magic angle spinning nuclear magnetic resonance(CP/MAS NMR), transmission electron microscopies(TEM) and field-scanning electron microscopies(FE-SEM) were adopted to cha-racterize the structure and morphology in detail. Significantly, the formed polymers exhibited special detection of unsaturated hydrocarbons through fluorescence enhancement based on photoactivatable 1,3-dipolar cycloaddition reactions. Furthermore, the reaction activity of different unsaturated hydrocarbons towards the polymers was investigated. This work highlights the great potential of porous organic polymers as chemical sensors in realizing environmental pollution monitoring and reducing the incidence of disease, such as chronic obstructive pulmonary disease.     

Graft Copolymers with Conducting Polymer Backbones: A Versatile Route to Functional Materials

Graft copolymers with a conducting polymer backbone are a promising class of materials for diverse applications including, but not limited to, organic electronics, stimuli‐responsive surfaces, sensors, and biomedical devices. These materials take advantage of the unique electrochemical and optoelectronic properties of conducting polymers, complemented by chemical and/or physical properties of the grafted sidechains. In this Personal Account, we discuss our work in designing functional surfaces based on graft copolymers with a conducting polymer backbone, in the context of broader developments in the field. We review the synthetic approaches available for the rational design of conducting‐polymer‐based graft copolymers, and examine the types of functional surfaces and soluble materials that may be engineered using these techniques.