Poly(3, 4-ethylenedioxythiophene) derived from poly(ionic liquid) for the use as holeInjecting material in organic light-emitting diodes

Taeyoung Kim, Minwon Suh, Soon Jae Kwon, Tae Hee Lee, Jong Eun Kim, You Jong Lee, Joo Hyung Kim, Prof Munpyo Hong, Kwang S. Suh

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

We report that poly(3, 4-ethylenedioxythiophene) derived from poly(ionic liquid) (PEDOT:PIL) constitutes a unique polymeric hole-injecting material capable of improving device lifetime in organic light-emitting diodes (OLEDs). Imidazolium-based poly(ionic liquid)s were engineered to impart non-acidic and non-aqueous properties to PEDOT without compromising any other properties of PEDOT. A fluorescent OLED was fabricated using PEDOT:PIL as a hole-injection layer and subjected to a performance evaluation test. In comparison with a control device using a conventional PEDOTbased material, the device with PEDOT:PIL was found to achieve a significant improvement in terms of device lifetime. This improvement was attributed to a lower indium content in the PEDOT:PIL layer, which can be also interpreted as the effective protection characteristics of PEDOT:PIL for indium extraction from the electrodes.

Original languageEnglish
Pages (from-to)1477-1482
Number of pages6
JournalMacromolecular Rapid Communications
Volume30
Issue number17
DOIs
Publication statusPublished - 2009 Sep 1

Keywords

  • Hole-injection layer
  • Long-term stability
  • Organic light emitting diodes
  • Pedot
  • Poly(ionic liquid)

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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