Compositions are provided comprising aqueous dispersions of polythiophenes
and colloid-forming polymeric acids. Films from invention compositions
are useful as buffer layers in organic electronic devices, including
electroluminescent devices, such as, for example, organic light emitting
diodes (OLED) displays in combination with metal nanowires or carbon
nanotubes in applications such as drain, source, or gate electrodes in
thin film field effect transistors.