Addition effect of aliphatic monools and diols on the conductivity enhancement of poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonic acid) (PEDOT:PSS)

The study was made of the addition effect of aliphatic monool and diol compounds (alcohols and glycols) on the conductivity enhancement of PEDOT:PSS films prepared from the aqueous coating mixture. This study made it clear that, 1)there is a large difference in conductivity enhancement ability between monools and diols, 2)the addition of monools have no effect on the conductivity enhancement of PEDOT:PSS films, 3) the addition of diols enhanced the conductivity of PEDOT:PSS films and their conductivity enhancement degree was dependent on the species (chemical structure) of diols, where 1,4-BD showed the highest conductivity enhancement effect among the diols, 4)there is good relationship between the SP values of diols and their conductivity enhancement ability and the diols with the SP values close to PEDOT (10.4) have higher conductivity enhancement ability, 5)diol addition effect was possibly attributable to its good solubility to PEDOT:PSS molecules judging from the SP values.