A low bandgap polymer (E-g similar to 1 eV) based on a bridged dithien
yl monomer has been prepared by electropolymerisation. SEM studies con
firm the formation of relatively smooth, uniform films. DC and AC elec
trical characterisation of Schottky diodes formed from the polymer sug
gest that the lack of significant rectification probably arises from a
high bulk polymer resistivity owing to excessive undoping.