Fig. 4: SEM images of PEDOT:PSS coated on PDMS with pyramid arrays.

a–b Water-based PEDOT:PSS. c–d PEDOT:PSS solvent-exchanged with EtOH. e–i Cross section views of the thickness profile of PEDOT:PSS solvent-exchanged with EtOH from base to top (red, yellow, green, and blue) with EDX measured positions.