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Photopatterning of PEDOT Derivatives with Photoacid Generators and Acid Amplifiers Generating Polystyrenesulfonic Acid

Photopatterning of PEDOT–PSS is desired but troublesome due to the insolubility of PEDOT and no alternatives of generating PSS in the film. We synthesized acid amplifiers (AAs) that can generate PSS autocatalytically. The AAs increase the concentration of PSS, with a catalytic amount of acids from PAGs. Furthermore, we used PEDOT–PEGs (PEDOT:polyethylene glycols) that disperse easily in organic solvents. By using these AAs, PEDOT–PEGs, and PAGs, we obtained photopatterns of PEDOT–PSS in a dry process. The obtained patterns had high transparency as well as a 106 order of difference in conductivity between the exposed (semiconductor) and unexposed (insulator) parts.