Output details

A comparative assessment of surface microstructure and electrical conductivity dependence on co-solvent addition in spin coated and inkjet printed poly(3,4-ethylenedioxythiophene):polystyrene sulphonate (PEDOT:PSS)

This publication presents cutting edge research into the most promising high conductivity polymer, PEDOT:PSS, and the new organic electronics patterning technique, inkjet printing. After material and process optimisation, it reports for the first time higher conductivity of inkjet printed against traditional spin coated PEDOT:PSS, with enormous implications for mass-produced organic electronics. This was fully justified by the coarser grain structure in the inkjet printed PEDOT:PSS AFM micrographs. Furthermore, a novel study of surface roughness versus conductivity of PEDOT:PSS, distinguishes between micro- and meso-roughness effects, justifying that the surfactant had no detrimental effect on conductivity despite causing meso-roughness.