聚(3,4-乙撑二氧噻吩)的二次掺杂改性研究

利用乙二醇(EG)对聚(3,4-乙撑二氧噻吩)(PEDOT)进行二次掺杂改性,考察了二次掺杂PEDOT薄膜的电学性能、表面形貌和分子组成,并且对PEDOT的二次掺杂改性机理进行了探讨.研究发现,未进行二次掺杂时,PEDOT导电颗粒因被绝缘的聚苯磺酸(PSS)包埋而不能彼此接触,电荷在PEDOT薄膜中的传导由隧道效应占主导,薄膜的电导率较低.二次掺杂后,PEDOT与PSS发生相分离,同时PSS的相对含量降低,PEDOT导电颗粒问形成导电通道,薄膜的电导率较高.     

导电聚合物BAYTRON~R及其在固体电解电容器上的应用

介绍新一代导电聚合物——聚乙烯二氧噻吩 (3,4- Polyethylene dioxythiophene,简称 PEDT)的主要特点 ,分析了其对固体电解电容器等效串联电阻、高频特性等性能的影响。PEDT将是今后开发新一代高频固体电解电容器的重点研究领域     

导电聚合物BAYTRON及其在固体电解电容器上的应用

介绍新一代导电聚合物－聚乙烯二氧噻吩（３,４－Ｐｏｌｙｅｔｈｙｌｅｎｅ ｄｉｏｘｙｔｈｉｏｐｈｅｎｅ,简称ＰＥＤＴ）的主要特点,分析了其对固体电解电容器等效串联电阻、高频特性等遥影响。ＰＥＤＴ将是今后开发新一代高频固体电解电 容器的重点研究领域。     

化学合成聚(3-甲基噻吩)及其在超电容器中的应用

以FeCl3为氧化剂,用化学氧化法制得了聚(3-甲基噻吩)粉末,此法操作简单且产量高。由此得到的活性物质与乙炔黑、偏氟乙烯-六氟丙烯共聚物(P(VDF-HFP))混合制成复合电极。按复合电极中的活性物质含量计算时,其单电极比容量可达260 F/g 。     

铝固体电解电容器电解质研究进展 Ⅱ.导电聚合物型铝固体电解电容器

综述了聚吡咯(PPY)、聚苯胺和聚(3,4–次乙二氧基噻吩)(PEDOT)等导电高分子材料在铝固体电解电容器中应用的最新研究情况。聚吡咯型铝固体电解电容器明显好于TCNQ复合盐型电容器。聚苯胺和聚(3,4–次乙二氧基噻吩)型铝固体电解电容器是尚在研究还未商业化的两类新品种,后一类因其高导电性、高环境稳定性,而最具发展前景。     

氟取代聚苯基噻吩系列衍生物的合成及应用

介绍了用于超级电容器电极材料的氟取代聚苯基噻吩系列聚合物,包括聚3-(4-氟苯基)噻吩(P-4-FPT)、聚3-(3-氟苯基)噻吩(P-3-FPT)、聚3-(3,4-二氟苯基)噻吩(P-3,4-DFPT)、聚3-(3,5-二氟苯基)噻吩(P-3,5-DFPT)、聚3-(3,4,5-三氟苯基)噻吩(P-3,4,5-TFPT)等的单体及其聚合物的合成方法及研究进展,并对该类聚合物电极材料的电化学性能进行了比较。     

基于PEDOT:PSS与碳纳米管复合纳米材料的应变传感器

提出一种基于导电聚合物聚(3,4-亚乙二氧基噻吩)-聚(苯乙烯磺酸)(PEDOT∶PSS)与碳纳米管(CNT)复合纳米材料的柔性应变传感器。介绍了复合纳米材料的制备、应变传感器的制备与封装以及传感器力学性能的测试。利用自制夹具对传感器进行了测试,测试结果表明制备的传感器在不同拉伸下,传感器U-I曲线符合欧姆定律,该传感器最大相对拉伸可达100%,应变灵敏度系数(GF)可达301,并且具有良好的重复性。该应变传感器在人类运动监测、个性化医疗以及心理健康监测等方面具有广阔的应用前景。     

聚3,4-乙撑二氧噻吩(PEDOT)-氧化石墨烯复合电极在有机发光二极管中的应用

通过将氧化石墨烯(Graphene Oxide,GO)与十二烷基苯磺酸钠(Sodium Dodecyl Benzene Sulfonate,SDBS)作为填料混入聚3,4-乙撑二氧噻吩∶聚苯乙烯磺酸(PEDOT∶PSS)溶液中制备了高透光率和低方块电阻的透明导电薄膜.当氧化石墨烯与PEDOT∶PSS质量比为0.02％时,薄膜获得了最佳的导电率,电阻为85 Ω/口,在550 nm的光波长下透光率为87％.采用不同掺杂比例的薄膜作为电极制备了有机发光二极管(OLED)器件,相比于常用的ITO电极,复合薄膜作为阳极更有利于空穴的注入和传输,所制备的器件能够得到更优的性能.这些结果表明PEDOT∶PSS和氧化石墨烯复合电极有望取代柔性OLED器件中的ITO阳极.     

基于液晶衬垫的OLED光萃取

采用旋涂的方法制备了(3,4-亚乙二氧基噻吩) :聚(苯乙烯磺酸)(PEDOT:PSS)薄膜,结合液 晶衬垫(LCS,liquid crystal spacer)对OLED进行光萃取,制备了结构为Glass/ITO/PEDOT:P SS/LCS/NPB(40nm)/Alq₃(40nm)/LiF(1nm )/Al(100nm)的OLED以及其相应的对比 器件。通过测量其电压、 电流、亮度、色坐标和电致发光(EL)光谱等参数,研究了LCS对OLED发光性能 的影响。结果表明, 当引入LCS后,OLED在电压为11V时,最大电流效率达6.15cd/A,比不加 LCS的器件提高了40%;且在电压从7V上升到12V的过程中,器件的色坐标仅从(0.31,0.57) 变化到(0.31,0.56)。究其原因,LCS的引入可以提高透过率,破坏器 件内部光的折射以及全反射条件,并使功能层形成褶皱结构,使更多的光子能够从器件内发 射,也增大了电极的表面积,使电流密度增加,注入的能量提高。     

导电聚合物PEDT对固体钽电解电容器性能的影响

采用具有高导电率(1~500 S/cm)、热稳定性好的导电聚合物 PEDT(聚 3,4-乙烯二氧噻吩)取代 MnO)_2,在固体钽电解电容器芯子上制作 PEDT 阴极层。主要研究了化学聚合条件对电容器性能的影响,结果显示聚合温度对电容器的损耗有一定的影响;氧化剂与单体的体积比保持在 3~6 范围内有利于降低 Res值,达到 0.02~0.08 Ω,并改善了钽电容器的频率特性。     

Poly(3,4-ethylenedioxythiophene)/graphene/carbon nanotube ternary composites with improved thermoelectric performance

Polymer based ternary thermoelectric composites have been studied. Here, poly(3,4-ethylenedioxythiophene)/graphene/carbon nanotube (PEDOT/graphene/CNT) ternary composites are prepared by in situ polymerization and subsequent physical mixing. Then, the morphology is directly observed by scanning electron microscopy. Finally, the thermoelectric performances are measured and discussed, where the effect of acid-treatment is investigated and comparison with those of the neat PEDOT and the binary PEDOT/graphene composite is conducted.     

Effect of Hydrogen Bonding on a Value of an Open Circuit Potential of Poly-(3,4-ethylenedioxythiophene) as a Beneficial Mode for Energy Storage Devices

Poly(3,4-ethylenedioxythiophene) is one of the semiconducting polymers that has attracted attention as electroactive materials for many different applications such as electrochromic devices, light-emitting diodes, biosensors, and supercapacitors. The fundamental understanding of the origin of its energy storage ability will lead to the proper design of such devices. Generally, the charge storage in supercapacitors is due to the formation of an electrical double layer and/or redox reactions. Recently, it is shown that the formation of cation radicals in PEDOT is induced by the hydrogen-bond formation between formic acid and polymer during electrochemical polymerization. The induced cation radicals play a major role in the charge storage ability of PEDOT, as studied in the current work. Furthermore, the presence of hydrogen bonds in PEDOT leads to the stable in time open circuit potential of 900 mV. This new knowledge leads to the designing of a symmetrical supercapacitor based on PEDOT as active material where hydrogen-bonds play a crucial role in the improved performance of the device.     

Application of Poly (3, 4-ethylenedioxythiophene):polystyrenesulfonate counter electrode in polymer heterojunction dye-sensitized solar cells

A Poly (3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT∶PSS)/carbon conductive paste was prepared and coated on a conducting FTO glass to construct counter electrode for polymer heterojunction ...     

Comparison of dimethyl sulfoxide treated highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) electrodes for use in indium tin oxide-free organic electronic photovoltaic devices

Indium tin oxide (ITO)-free organic photovoltaic (OPV) devices were fabricated using highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as the transparent conductive electrode (TCE). The intrinsic conductivity of the PEDOT:PSS films was improved by two different dimethyl sulfoxide (DMSO) treatments – (i) DMSO was added directly to the PEDOT:PSS solution (PEDOT:PSS_ADD) and (ii) a pre-formed PEDOT:PSS film was immersed in DMSO (PEDOT:PSS_IMM). X-ray photoelectron spectroscopy (XPS) and conductive atomic force microscopy (CAFM) studies showed a large amount of PSS was removed from the PEDOT:PSS_IMM electrode surface. OPV devices based on a poly(3-hexylthiophene):[6,6]-phenyl-C₆₁-butyric acid methyl ester (P3HT:PCBM) bulk hetrojunction showed that the PEDOT:PSS_IMM electrode out-performed the PEDOT:PSS_ADD electrode, primarily due to an increase in short circuit current density from 6.62 mA cm⁻² to 7.15 mA cm⁻². The results highlight the importance of optimising the treatment of PEDOT:PSS electrodes and demonstrate their potential as an alternative TCE for rapid processing and low-cost OPV and other organic electronic devices.     

Optimizing the Optoelectronic Properties of Face-On Oriented Poly(3,4-Ethylenedioxythiophene) via Water-Assisted Oxidative Chemical Vapor Deposition

Engineering the texture and nanostructure to improve the electrical conductivity of semicrystalline conjugated polymers must address the rate-limiting step for charge carrier transport. In highly face-on orientation, the charge transport between chains within a crystallite becomes rate-limiting, which is highly sensitive to the π–π stacking distance and interchain charge transfer integral. Here, face-on oriented semicrystalline poly(3,4-ethylenedioxythiophene) (PEDOT) thin films are grown via water-assisted (W-A) oxidative chemical vapor deposition (oCVD). Combining W-A with the volatile oxidant, antimony pentachloride, yields an optimized electrical conductivity of 7520  ±  240 S cm⁻¹, a record for PEDOT thin films. Systematic control of π–π stacking distance from 3.50 Å down to 3.43 Å yields an electrical conductivity enhancement of ≈ 1140%. The highest electrical conductivity also corresponds to minimum in Urbach energy of 205 meV, indicating superior morphological order. The figure of merit for transparent conductors, σ_dc/σ_op, reaches a maximum value of 94, which is 1.9 × and 6.7 × higher than oCVD PEDOT grown without W-A and utilizing vanadium oxytrichloride and iron chloride oxidizing agents, respectively. The W-A oCVD is single-step all-dry process and provides conformal coverage, allowing direct growth on mechanical flexible, rough, and structured surfaces without the need for complex and costly transfer steps.     

Dual‐Functional Poly(3,4‐ethylenedioxythiophene)/MnO2 Nanoellipsoids for Enhancement of Neurite Outgrowth and Exocytosed Biomolecule Sensing in PC12 Cells

Dual‐functional MnO₂‐decorated poly(3,4‐ethylenedioxythiophene) (PEDOT/MnO₂) nanoellipsoids are fabricated for enhancement of neurite outgrowth during differentiation and real‐time monitoring of PC12 cells. The PEDOT nanoellipsoids are prepared by chemical oxidation polymerization in reverse microemulsion and the MnO₂ domains on the surface of the PEDOT are formed by redox deposition. A PC12 cell is used as a model cell for neuronal differentiation. The morphology, differentiation efficiency, average neurite length, expression level of DMT1, phosphorylation of ERK1/2, and viability of PC12 cells upon the exposure of the PEDOT/MnO₂ nanoellipsoids are examined. The PEDOT/MnO₂ nanoellipsoids facilitate neurite outgrowth in proportion to the dose of the nanoellipsoids, and MnO₂ domains play a pivotal role in facilitation effects on cell differentiation. The PEDOT/MnO₂ nanoellipsoids represent low toxicity in the cells due to biocompatible PEDOT matrix. Moreover, the PEDOT/MnO₂ nanoellipsoids are further applied as a transducer material for label‐free real‐time monitoring of PC12 cells. The exocytosed catecholamines from living cells are successfully detected. The dual‐functionalized PEDOT/MnO₂ nanoellipsoids may be used in tissue engineering related to the development and monitoring of mammalian nervous systems.