Polyaniline-based conducting polymer compositions with a high work function for hole-injection layers in organic light-emitting diodes: Formation of ohmic contacts

Mi Ri Choi, Seong Hoon Woo, Tae Hee Han, Kyung Geun Lim, Sung Yong Min, Won Min Yun, Oh Kwan Kwon, Chan Eon Park, Kwan Do Kim, Hoon Kyu Shin, Myeong Suk Kim, Taeyong Noh, Jong Hyeok Park, Kyoung Hwan Shin, Jyongsik Jang, Tae Woo Lee

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Abstract

It is a great challenge to develop solution-processed, polymeric hole-injection layers (HILs) that perform better than small molecular layers for realizing high-performance small-molecule organic light-emitting diodes (SM-OLEDs). We have greatly improved the injection efficiency and the current efficiency of SM-OLEDs by introducing conducting polymer compositions composed of polyaniline doped with polystyrene sulfonate and perfluorinated ionomer (PFI) as the HIL. During single spin-coating of conducting polymer compositions, the PFI layer was self-organized at the surface and greatly increased the film work function. It enhanced hole-injection efficiency and current efficiency by introducing a nearly ohmic contact and improving electron blocking. Our results demonstrate that solution-processed polyaniline HILs with tunable work functions are good candidates for reducing process costs and improving OLED performance.

Original languageEnglish
Pages (from-to)363-368
Number of pages6
JournalChemSusChem
Volume4
Issue number3
DOIs
Publication statusPublished - 2011 Mar 21

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

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    Choi, M. R., Woo, S. H., Han, T. H., Lim, K. G., Min, S. Y., Yun, W. M., Kwon, O. K., Park, C. E., Kim, K. D., Shin, H. K., Kim, M. S., Noh, T., Park, J. H., Shin, K. H., Jang, J., & Lee, T. W. (2011). Polyaniline-based conducting polymer compositions with a high work function for hole-injection layers in organic light-emitting diodes: Formation of ohmic contacts. ChemSusChem, 4(3), 363-368. https://doi.org/10.1002/cssc.201000338