The Synthesis and Application of Poly(3,4-ethylenedioxythiophene)

The development history, performances, applications, and tendency of poly (3,4-ethylenedioxythiophene) are presented. The problem with process was solved by doping with polystyrene sulfonic acid. The obtained PEDT/PSS film is characterized by its high conductivity (10 S/cm), high light transmissivity (almost transparent in the range of visible light), high mechanical strength, high resistance to hydrolysis, high light stability and thermal stability (almost no change in resistance supposed to 110 to 200 C, 1 000 h). The film is successfully used in solid electrolytic capacitors.