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Optica Publishing Group
  • Journal of Display Technology
  • Vol. 12,
  • Issue 4,
  • pp. 338-343
  • (2016)

Two Photolithographic Patterning Schemes for PEDOT:PSS and Their Applications in Organic Light-Emitting Diodes

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Abstract

Poly(3,4-ethylenedioxythio-phene):poly(styrenesulfonate) (PEDOT:PSS) is a promising conductive polymer in future flexible applications. To apply PEDOT:PSS into organic electronic devices, patterning processes are essential. Here, two photolithographic patterning schemes are introduced, namely fluorinated materials and silver interlayers. With hydrofluoroethers (HFEs) solvents and fluorinated photoresist, PEDOT:PSS can be patterned down to micro scales. Using a silver thin film to protect PEDOT:PSS surface, traditional photolithographic materials can be applied for PEDOT:PSS patterning. These two patterning processes do not obviously influence the electrical characteristics of PEDOT:PSS, and patterned conductive PEDOT:PSS is successfully applied to organic light-emitting diodes (OLEDs) as anodes. These patterning schemes can easily be used on large substrates, and high-resolution flexible OLED strips are also demonstrated. These results imply that the proposed PEDOT:PSS patterning schemes here have great potential to be employed in organic electronic devices.

© 2015 IEEE

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