Physico-chemical properties and application of the conductive organic polymer poly-3,4 ethylenedioxythiophene-polystyrol sulfona

The history of the creation of conductive organic materials began in 1977, when, through the modification of polyacetylene, a material was created that conducts electricity almost as well as metals. These discoveries and other fundamental research in the field of organic polymers have contributed to the development of organic electronics, which combines developments in solid state and molecular physics, organic and inorganic chemistry, polymeric materials science, electronics and printing. One of the promising materials that can and are already being used in organic electronics is poly-3,4-ethylenedioxythiophene-polystyrene sulfonate (PEDOT:PSS) is a polymer electrolyte consisting of a positively charged polymer (PEDOT) and a negatively charged surface-active substances - anionic surfactant - polystyrene sulfonic acid (PSS) and is the most successful polymeric material in terms of practical application. PEDOT is a class of substituted polythiophene and is an example of good electrochromic material. The charge transfer in the conductive PEDOT polymer is via a bonded system due to electron-exchange reactions between adjacent redox sites (between the polymer fragments where the electron or hole is delocalized) and is accompanied by the movement of the dopant anions along the polymer chain. The recent discovery of the outstanding thermoelectric properties of conductive polymer PEDOT: PSS opens up new prospects for the use of conductive organic polymers in such fields as robotics, medicine, advertising, and many others. The review is devoted to the structure, physicochemical properties and application of conductive polymer of poly-3,4-ethylenedioxythiophene-polystyrene sulfonate (PEDOT: PSS), as well as methods of manufacturing and research of its properties, operational parameters, directions of practical use of devices from this organic polymer. The main applications of PEDOT are described: PSS in electronics, in particular in solar cells and sensors, and in biomedicine as a substrate.