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Journal of Display Technology

Journal of Display Technology


  • Vol. 6, Iss. 7 — Jul. 1, 2010
  • pp: 252–256

Solution-Processed Flexible ITO-Free Organic Light-Emitting Diodes Using Patterned Polymeric Anodes

Younchan Yim, Jongwoon Park, and Byoungchoo Park

Journal of Display Technology, Vol. 6, Issue 7, pp. 252-256 (2010)

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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

Younchan Yim, Jongwoon Park, and Byoungchoo Park, "Solution-Processed Flexible ITO-Free Organic Light-Emitting Diodes Using Patterned Polymeric Anodes," J. Display Technol. 6, 252-256 (2010)

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