Abstract
We discuss a thin-film spin-coating and patterning process of a conductive
polymer electrode for flexible organic light-emitting diodes (OLEDs). For the polymeric
anode, dimethylsulfoxide (DMSO)-doped poly(3,4-ethylenedioxythiophene):poly(styrene
sulfonate) (PEDOT:PSS) has been spin coated on a non-ionic surfactant layer that was
pre-coated on the polyethersulfone (PES) substrate. A peel-off method has then been
employed to pattern the conductive polymer anode without UV irradiation or heat
treatment involved. A peel-off pattern is induced by different adhesion energy among a
hydrophobic flexible substrate, a hydrophilic polymeric anode layer, and an adhesive
film peeler that is in contact with the polymer anode. With this process technology, we
have successfully fabricated solution-processed flexible green OLEDs, showing a peak
luminescence of 6000 ${\hbox{cd/m}}^{2}$ and a maximum current efficiency of 16.2 cd/A.
© 2010 IEEE
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