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Study on Conductivity Properties of PEDOT Prepared through a Modified LB Film Method

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Chinese Journal of Chemistry 2011年第3期29卷 415-421页

作者： Zheng, Huajing jiang, yadong xu, jianhua yang, yajie State Key Laboratory of Electronic Thin Films & Integrated Devices School of Optoelectronic Information University of Electronic Science and Technology of China Chengdu Sichuan 610054 China

Adopting LB film method, an arachidic acid （AA）/PEDOT multilayer LB film was chosen, and polymerized EDOT monomers in hydrophilic group of LB to prepare arachidic acid （AA）/PEDOT multilayer LB film. UV-Vis, FT-IR and XPS analyses implied that EDOT was effectively polymerized in film, and thus PEDOT conducting polymer was produced. Analyses of XRR and SIMS indicated that film had a well-arranged lamella structure, and further research showed that polymerization of EDOT in AA film destroyed the orderliness of the original LB film. This phenomenon could be related to the destructive effect of polymerization on layered structure. We used four-point probe and semiconductor instrument to study the conductivity property of the film, and observed that the conductivity of AA/PEDOT film had sudden changes with the processing time of changes in effective conduction network. That was caused by ＂permeability＂ in conducting channel of multilayer film. The test results also indicated that the conductivity of AA/PEDOT film was obviously better than that of spin-coating PEDOT/PSS film or that of ODA-SA/PEDOT-PSS film, which was due to the higher π structure of PEDOT structure and ordered film structure.

关键词： PEDOT LB film method conductivity properties measurement

Vapor Phase Polymerization Deposition Conducting Polymer Nanocomposites on Porous Dielectric Surface as High Performance Electrode Materials

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Nano-Micro Letters 2013年第1期5卷 40-46页

作者： Ya jie yang Luning Zhang Shibin Li Zhiming Wang jianhua xu Wenyao yang yadong jiang State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic InformationUniversity of Electronic Science and Technology of China (UESTEC)

We report chemical vapor phase polymerization(VPP) deposition of poly(3,4-ethylenedioxythiophene)(PEDOT) and PEDOT/graphene on porous dielectric tantalum pentoxide(Ta_2O_5) surface as cathode films for solid tantalum electrolyte capacitors. The modified oxidant/oxidant-graphene films were first deposited on Ta_2O_5 by dip-coating, and VPP process was subsequently utilized to transfer oxidant/oxidant-graphene into PEDOT/PEDOT-graphene films. The SEM images showed PEDOT/PEDOT-graphene films was successfully constructed on porous Ta_2O_5 surface through VPP deposition, and a solid tantalum electrolyte capacitor with conducting polymer-graphene nano-composites as cathode films was constructed. The high conductivity nature of PEDOT-graphene leads to resistance decrease of cathode films and lower contact resistance between PEDOT/graphene and carbon paste. This nano-composite cathode films based capacitor showed ultralow equivalent series resistance(ESR) ca. 12 m? and exhibited excellent capacitance-frequency performance, which can keep 82% of initial capacitance at 500 KHz. The investigation on leakage current revealed that the device encapsulation process has no influence on capacitor leakage current, indicating the excellent mechanical strength of PEDOT/PEDOT-gaphene films. This high conductivity and mechanical strength of graphene-based polymer films shows promising future for electrode materials such as capacitors, organic solar cells and electrochemical energy storage devices.

关键词： Vapor-phase polymerization Conducting polymers Graphene Nanocomposites Solid tantalum electrolyte capacitor

The characteristic properties of PEDOT nano-particle based on reversed micelle method

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Science China(Technological Sciences) 2010年第9期53卷 2355-2362页

作者： ZHENG HuaJing,jiang yadong,xu jianhua & yang yajie State Key Laboratory of Electronic Thin Films & Integrated Devices,School of Optoelectronic Information,University of Electronic Science and Technology of China,Chengdu 610054,China State Key Laboratory of Electronic Thin Films & Integrated Devices School of Optoelectronic Information University of Electronic Science and Technology of China Chengdu China

Based on the study of a new type of conducting polymer poly (3,4-ethylenedioxythiophene) (PEDOT),this paper focuses on the preparation and the materials properties of PEDOT nanoparticles made by reversed micelle *** on optical,electrical and the thermal stability of PEDOT nanoparticles were carried *** main results were as follows: The small-sized PEDOT nanoparticles were prepared by different methods,such as ultraviolet/visible (UV-Vis) spectroscopy,fourier-transform infrared (FT-IR) spectrum,scanning electron microscopy (SEM) and so *** Bragg peaks of nanoparticles at 6.7°,12.7°,25° were observed by XRD and the good orientation of molecular chain was attributed to the effective doping of toluene-p-sulfonic acid,which also resulted in an enhancement of thermal stability of nanoparticles compared with the conventional ***,the gas sensitivity of nanoparticles deposited on quartz crystal microbalance (QCM) was studied and the nanopartices deposited device exhibited excellent sensitivity to HCl gas at low *** sensitivity of the nanoparticles by the reverse micelle was better than that of the common PEDOT particles.

关键词： poly (3 4-ethylenedioxythiophene) conducting polymer reversed micelle n-particle photoelectric properties thermal stability

Analysis on the Characteristic Properties of PEDOT Nano-particle Based on Reversed Micelle Method

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Journal of Wuhan University of Technology(Materials Science) 2011年第3期26卷 422-428页

作者：郑华靖 State Key Laboratory of Electronic Thin Films&Integrated Devices School of Optoelectronic InformationUniversity of Electronic Science and Technology of China

Based on the study of a new type of conducting polymer poly （3,4-ethylenedioxythiophene）（PEDOT）,we focussed on the preparation and characteristics of PEDOT nanoparticles made by reversed micelle ***,we deeply investigated the optical,electrical and the thermal stability of PEDOT *** main results are as follows： the small-sized PEDOT nanoparticles were prepared and utilized by different methods,such as ultraviolet/visible （UV-Vis） spectroscopy,Fourier-transform infrared （FT- IR） spectrum,scanning electron microscopy（SEM） and so *** results show that the amount of oxidizer,ultrasonic treatment,polymerizing temperature and doping degree can influent morphology,electrical ability and gas sensitivity of PEDOT *** Bragg peaks of nanoparticles at 6.7°,12.7°,25° were observed by XRD and the better orientation of molecular chain was attributed to the effective doping of toluene-p-sulfonic acid,which also resulted in an enhancement of thermal stability of nanoparticles than conventional PEDOT.

关键词： poly (3 4-ethylenedioxythiophene) conducting polymer reversed micelle nano-particle photoelectric properties thermal stability

Structures and Properties of PEDOT Nanotubes Prepared by a Template Synthesis Method

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Journal of Wuhan University of Technology(Materials Science) 2009年第2期24卷 287-291页

作者：徐建华 State Key Laboratory of Electronic Thin Films Integrated Devices School of Optoelectronic Information University of Electronic Science and Technology of China

PEDOT nanotubes were prepared by a template synthesis method. Based on our template, it was deduced that there are two successive processes in the formation of nanotubes. The first step is soakage of the porous templates by a polymer solution, and the second step is adsorption of free charged cationic groups and doped PEDOT onto the template surface with negative charges. XRD results showed that well orientated PEDOT chains were formed during the synthesis, moreover the arrange conductivity of molecular chains strongly affect the structures of PEDOT nanotubes. The nanotubes were measured to be about 5.5-17.6 S/cm, which is higher than that of nanotube pellet due to the high contact resistance between the adjacent nanotubes.

关键词： PEDOT nanotube template synthesis method structure property

PEDOT-PSS导电聚合物LB薄膜的制备和性能

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材料研究学报 2007年第4期21卷 399-403页

作者：杨亚杰蒋亚东徐建华电子科技大学电子薄膜与集成器件国家重点实验室成都610054

研究了十八胺(ODA)及其与硬脂酸(SA)混合单分子膜在导电聚合物聚3,4-乙烯二氧噻吩/聚苯乙烯磺酸(PEDOT- PSS)胶体亚相上的成膜行为和复合LB膜在室温下的电学性能.结果表明:ODA-SA/PEDOT-PSS复合LB膜具有更好的成膜性能,表面粗糙度小且... 详细信息

研究了十八胺(ODA)及其与硬脂酸(SA)混合单分子膜在导电聚合物聚3,4-乙烯二氧噻吩/聚苯乙烯磺酸(PEDOT- PSS)胶体亚相上的成膜行为和复合LB膜在室温下的电学性能.结果表明:ODA-SA/PEDOT-PSS复合LB膜具有更好的成膜性能,表面粗糙度小且稳定可控,薄膜具有较好的有序结构;ODA-SA/PEDOT-PSS膜电导率高于ODA/PEDOT- PSS复合LB膜,其电导率呈各向异性,水平电导率(σ_‖)与垂直电导率(σ_⊥)之间相差3～4个数量级,Ⅰ-Ⅴ曲线呈指数关系,为典型的电子隧穿类型.

关键词：有机高分子材料 PEDOT—PSS LB膜成膜性电导率

自组装超薄膜修饰Ta_2O_5介质膜及其特性研究

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化学学报 2012年第8期70卷 961-967页

作者：杨亚杰徐建华蒋亚东闻俊峰电子薄膜与集成器件国家重点实验室、电子科技大学光电信息学院成都610054

采用静电自组装方法在五氧化二钽(Ta2O5)介质氧化膜上制备了聚二烯丙基二甲基氯化铵(PDDA)/聚苯乙烯磺酸钠(PSS)和聚二烯丙基二甲基氯化铵/聚-3,4-乙烯二氧噻吩-聚苯乙烯磺酸钠(PEDOT-PSS)超薄膜.研究了两种自组装超薄膜在Ta2O5介质氧... 详细信息

采用静电自组装方法在五氧化二钽(Ta2O5)介质氧化膜上制备了聚二烯丙基二甲基氯化铵(PDDA)/聚苯乙烯磺酸钠(PSS)和聚二烯丙基二甲基氯化铵/聚-3,4-乙烯二氧噻吩-聚苯乙烯磺酸钠(PEDOT-PSS)超薄膜.研究了两种自组装超薄膜在Ta2O5介质氧化薄膜上的组装特性.结果表明两种自组装膜能够稳定地组装于Ta2O5介质膜表面,并有效降低薄膜的表面粗糙度.进一步研究了两种自组装超薄膜修饰的Ta2O5电容结构的电性能.结果表明静电自组装膜对Ta2O5介质膜表面进行修饰后,有效地隔离了介质氧化膜中的缺陷,降低了电容的漏电流并提高耐电压能力;研究还发现不同厚度的超薄膜对Ta2O5电容结构的耐压特性有不同程度的影响,较厚的薄膜可以更好地提高电容的耐压能力并降低漏电流,但会增加电容的等效串联电阻(ESR).另外,在相同薄膜层数的情况下,聚合物电解质PEDOT-PSS良好的导电性能降低了复合超薄膜的电阻,使得PDDA/PEDOT-PSS修饰的电容结构ESR值较低.

关键词：静电自组装 Ta2O5 耐压能力等效串联电阻漏电流

修饰Langmuir-Blodget膜法制备聚(3,4-亚乙基二氧噻吩)薄膜结构和导电性能的研究

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高分子学报 2010年第8期20卷 1043-1049页

作者：郑华靖蒋亚东徐建华杨亚杰电子科技大学光电信息学院电子薄膜与集成器件国家重点实验室成都610054

采用修饰Langmuir-Blodget(LB)膜法以二十烷酸(AA)LB膜为模板,通过3,4-亚乙基二氧噻吩(EDOT)单体在LB膜亲水基团间聚合,制备了二十烷酸/聚(3,4-亚乙基二氧噻吩)(AA/PEDOT)复合LB膜.UV-Vis、FTIR和XPS分析表明EDOT在多层膜中有效聚合,生... 详细信息

采用修饰Langmuir-Blodget(LB)膜法以二十烷酸(AA)LB膜为模板,通过3,4-亚乙基二氧噻吩(EDOT)单体在LB膜亲水基团间聚合,制备了二十烷酸/聚(3,4-亚乙基二氧噻吩)(AA/PEDOT)复合LB膜.UV-Vis、FTIR和XPS分析表明EDOT在多层膜中有效聚合,生成了PEDOT导电聚合物;X射线衍射(XRD)和二次离子质谱(SIMS)分析表明薄膜具有较好的层状有序结构,进一步研究发现EDOT在AA多层膜中的聚合破坏了原有LB膜的有序性,这可能与聚合过程对层状结构产生的破坏作用有关;采用四探针仪及半导体测试仪研究了薄膜导电性能,发现AA/PEDOT多层膜的电导率随处理时间的变化产生突变,这与多层膜中导电通道的"逾渗"有关,在有效导电网络连通后电导率发生了突变.测试结果还表明AA层和PEDOT层之间具有较为明显的界面,PEDOT显示出较好的定域性,薄膜具有很好的层状有序结构.

关键词： PEDOT LB膜法光电性能测量

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导电聚合物有序超薄膜性质

化工学报 2011年第2期62卷 551-560页

作者：郑华靖蒋亚东徐建华杨亚杰电子科技大学光电信息学院电子薄膜与集成器件国家重点实验室四川成都610054

采用修饰多层LB膜的方法制备导电聚合物聚3,4-乙烯二氧噻吩/聚苯乙烯磺酸(PEDOT-PSS)/十八胺(ODA)及硬脂酸(SA)复合层状有序膜。实验表明,PEDOT-PSS纳米粒子对单分子层具有包裹作用,形成了稳定的复合单分子膜;二次离子质谱(SIMS)和小角... 详细信息

采用修饰多层LB膜的方法制备导电聚合物聚3,4-乙烯二氧噻吩/聚苯乙烯磺酸(PEDOT-PSS)/十八胺(ODA)及硬脂酸(SA)复合层状有序膜。实验表明,PEDOT-PSS纳米粒子对单分子层具有包裹作用,形成了稳定的复合单分子膜;二次离子质谱(SIMS)和小角X射线反射(XRR)分析表明ODA-SA/PEDOT-PSS组装体形成的多层复合膜具有较好的层状结构,单层厚度约为23 nm,这与纳米粒子的尺寸相当;设计了不同的测试结构,测量了复合膜的垂直电导率和水平电导率,研究了薄膜的直流电流-电压特性,采用变程跳跃模型(VRH)对结果进行了拟合,结果表明,三维变程跳跃模型(3D-VRH)可以较好地解释多层膜中载流子的迁移。

关键词：导电聚合物聚3,4-乙烯二氧噻吩/聚苯乙烯磺酸 LB膜电导率