A Langmuir-Blodgett (LB) inducing method was firstly used to prepare single layer and multilayer conducting composite arachidic acid (AA)/PEDOT film. The analysis of experiments implied that EDOT effectively polymerized in film and indicated that film had a well-arranged lamella structure, and further research showed that polymerization of EDOT in AA film destroyed the orderliness of the original LB film. This phenomenon could be related to the destructive effect of polymerization on layered structure. We used four-point probe and semiconductor instrument to study the conductivity property of the film, and observed that when the conductivity of AA/PEDOT film had sudden changes, which was caused by “permeability” in conducting channel of multilayerfilm. The permeability was that the conductivity had sudden change when effective conduction network connected. The test results also indicated that the conductivity of AA/PEDOT film was obviously better than the conductivity of spin-coating PEDOT/PSS film or the conductivity of ODA-SA/PEDOT-PSS film, which due to the higher π structure of PEDOT structure and ordered film structure.

Key words: PEDOT, LB film method, photoelectric properties, measurement