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

    53 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 Sept 1

    Keywords

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

    ASJC Scopus subject areas

    • Materials Chemistry
    • Polymers and Plastics
    • Organic Chemistry

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