Rwei Syang-Peng, Lee Yi-Huan, Shiu Jia-Wei, Sasikumar Ragu, Shyr Uin-Ting
Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 10608, Taiwan.
Research and Development Center for Smart Textile Technology, National Taipei University of Technology, Taipei 10608, Taiwan.
Polymers (Basel). 2019 Jan 14;11(1):134. doi: 10.3390/polym11010134.
The conducting polymer of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) is one of the most important and intensively investigated organic conducting materials. The PEDOT:PSS water dispersions with various concentrations of poly (4-styrenesulfonic acid) solution (PSSAS) were synthesized by 3,4-ethylenedioxythiophene (EDOT) in the presence of water. The fabrication of the solvent-treated PEDOT:PSS films through spin coating and solvent treatment processes was achieved with a solvent of pure water mixed with acetone (or MeOH, EtOH) in a ratio of 50:50. Moreover, both the organic solvent and water have synergetic effects while the PSS and PEDOT-attached PSS segments will form a coil-like and a linear (or extended-coil) structure, respectively. That may induce a stacking of the linear and planar PEDOT-attached PSS segments, which favors the formation of a crystalline phase. Finally, the maximum electrical conductivity of the PEDOT:PSS thin films with solvent treatment was investigated by means of X-ray diffraction (XRD) patterns and scanning electron microscope (SEM) images. Furthermore, we aimed to explain the synergetic effects of phase separation of the PEDOT:PSS thin films by both the organic solvent and water.
聚（3,4-乙撑二氧噻吩）：聚（4-苯乙烯磺酸盐）（PEDOT:PSS）导电聚合物是最重要且研究最深入的有机导电材料之一。通过在水存在的情况下用3,4-乙撑二氧噻吩（EDOT）合成了具有不同浓度聚（4-苯乙烯磺酸）溶液（PSSAS）的PEDOT:PSS水分散体。使用纯水与丙酮（或甲醇、乙醇）按50:50比例混合的溶剂，通过旋涂和溶剂处理工艺制备了溶剂处理的PEDOT:PSS薄膜。此外，有机溶剂和水都具有协同作用，而PSS和附着有PEDOT的PSS链段将分别形成盘绕状和线性（或伸展盘绕）结构。这可能会导致附着有PEDOT的线性和平面PSS链段发生堆积，有利于形成结晶相。最后，通过X射线衍射（XRD）图谱和扫描电子显微镜（SEM）图像研究了经过溶剂处理的PEDOT:PSS薄膜的最大电导率。此外，我们旨在解释有机溶剂和水对PEDOT:PSS薄膜相分离的协同作用。
