Preparation Of Polyethylene Dioxythiophene (PEDOT) And Its Composite With Inorganic Materials

Conductive polymer materials have a wide range of applications in many fields.However,due to their difficulties in processing applications,the most successful conductive polymer materials have so far been polypyrrole,polythiophene,polyaniline,etc.Among them,the most attractive conductive polymer is the PEDOT:PSS(polyethylenedioxythiophene: polystyrenesulfonic acid)aqueous dispersion developed by Bayer.Usually,polyethylene dioxythiophene is doped with polystyrene sulfonic acid and emulsified,and then dispersed in water to prepare an aqueous coating or an aqueous ink.Unfortunately,the PEDOT:PSS polymerized by emulsion in industrial production is usually nanosphere-shaped,and this nanospherical structure limits its industrial application.To solve this problem,our work focused on the study of the PEDOT:PSS(polyethylenedioxythiophene: polystyrenesulfonic acid)synthesized by emulsion polymerization and the PEDOT: AOT(polyethylene dioxythiophene: dioctyl sulfonic acid succinate)synthesized by inverse emulsion polymerization.And the effects of their nano-microstructures on macroscopic properties were investigated.Further research on the composite and performance of PEDOT:PSS and silver nanowires was conducted,and strived to expand the industrial application range of polyethylene dioxythiophene,in a view to PEDOT: PSS/inorganic composites used in high-tech fields.The results show that PEDOT:AOT prepared by inverse emulsion polymerization possess nanowire and nanorod structure,and the prepared conductive film can maintain good conductivity after blistering.Considering factors such as production cost,process difficulty and equipment investment,PEDOT:PSS have advantages over PEDOT:AOT obtained by inverse emulsion polymerization.We combines PEDOT:PSS with nano-silver wire to prepare low-cost,flexible silver nanowire/PEODT:PSS composites,and preliminary research on the application of materials in organic solar cells.It is found that this silver nanowire/PEDOT:PSS/organic photosensitive layer(P3HT:PCBM)/Al composite(where P3HT:PCBM is poly-3-hexylthiophene: fullerene derivative,Al is aluminum),in AM 1.5(100 mW/cm2)of simulated solar illumination,the photoelectric conversion efficiency reach as high as 2.13%.The silver nanowire/PEDOT:PSS composite prepared in this work has the feasibility of replacing ITO(indium tin oxide),which is expected to be applied in flexible screen or organic solar cells.