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 language | English |
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Pages (from-to) | 1477-1482 |
Number of pages | 6 |
Journal | Macromolecular Rapid Communications |
Volume | 30 |
Issue number | 17 |
DOIs | |
Publication status | Published - 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