Patent ID: 7399433

Claim:
A process for preparing a stable n-doping conjugated electroactive polymer comprising: providing a solution containing monomeric 2,5-bis(trimethylsilyl)-3,4-difluorothiophene in boron trifluoride-diethyl ether complex electrolyte; contacting a platinum substrate with said solution; selecting a first electrical potential where said 2,5-bis(trimethylsilyl)-3,4-difluorothiophene is in a reduced state and a second electrical potential necessary to oxidize said 2,5-bis(trimethylsilyl)-3,4-difluorothiophene; applying an electrical potential to said platinum substrate in contact with said solution; cycling said electrical potential at a predetermined rate of change between said selected first electrical potential and said selected second electrical potential to effect electrodeposition of poly(3,4-difluorothiophene) on said platinum substrate; growing a film of stable n-doping poly(3,4-difluorothiophene) of a desired thickness on said platinum substrate by cycling said electrical potential for a predetermined time.