Citation: . LOW POTENTIAL ELECTROPOLYMERIZATION OF ANISOTROPIC CONDUCTIVE POLYTHIOPHENE FILMS AND FABRICATION OF ELECTRICAL DEVICES[J]. Chinese Journal of Polymer Science, ;1999, 17(2): 99-111. shu

LOW POTENTIAL ELECTROPOLYMERIZATION OF ANISOTROPIC CONDUCTIVE POLYTHIOPHENE FILMS AND FABRICATION OF ELECTRICAL DEVICES

Received Date: 19 October 1997

The complexation of thiophene with a Lewis acid with moderate acidity as a solvent, such as BF_3-ethyl ether (BFEE) remarkedly lowered the electrochemical polymerization potential. The positively chargedmetal surface of electrode in the process of electrochemical deposition enhanced the coordination interactionbetween π-electrons of thiophene unit and the metal, which makes thiophene rings lie parallel to the surfaceof electrode, resulting in a highly ordered polymeric structure. Because of the large intra-chain transfer integrals,the transport of charge is believed to be principally along the conjugated chains,which is much greater than the inter-chain hopping.The specific electrical resistance across the polythiophene film thickness is more than 104 times than that along the surface plane of the film.In this paper we review the recent development of polymerization technique by low potential electrochemical method performed in our lab and several electrical devices in which the compact polythiophene films,such as anionic and cationic sieves,and laminate film junction of undoped polythiophene derivaties were used.
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