Abstract: The photoelectrochemical polymerization process: monomer first polymerizes into low polymer and then the low polymer may be oxidized into polymerfilm.
monomer→low polymer→polymerfilm
Irradiation can accelerate the formation of low polymer. The rate of the first step for pyrrole and thiophene is slow, and the second step for aniline is slow. When the film is formed, it can speed up the rate of film formation.

Key words: Photoelectrochemical polymerization, Conducting polymer, Polyaniline, Polypurrole, Polythiophene