Self-organized gradient hole injection to improve the performance of polymer electroluminescent devices
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- Title
- Self-organized gradient hole injection to improve the performance of polymer electroluminescent devices
- Authors
- Lee, TW; Chung, Y; Kwon, O; Park, JJ
- Date Issued
- 2007-02-12
- Publisher
- WILEY-V C H VERLAG GMBH
- Abstract
- A new approach to forming a gradient hole-injection layer in polymer light-emitting diodes (PLEDs) is demonstrated. Single spin-coating of hole-injecting conducting polymer compositions with a perfluorinated ionomer results in a work function gradient through the layer formed by self-organization, which leads to remarkably efficient single-layer PLEDs (ca. 21 cd A(-1)). The device lifetime is significantly improved (ca. 50 times) compared with the conventional hole-injection layer, poly(3,4-ethylene-dioxythiophene)/poly(styrene sulfonate). These results are a good example for demonstrating that the shorter lifetime of PLEDs compared with small-molecule-based organic LEDs (SM-OLEDs) is not mainly due to the inherent degradation of the polymeric emitter itself. Hence, the results open the way to further improvements of PLEDs for real applications to large-area, high-resolution, and full-color flexible displays.
- Keywords
- LIGHT-EMITTING-DIODES; INDIUM-TIN-OXIDE; CONJUGATED POLYMERS; PHOTOELECTRON-SPECTROSCOPY; INTERFACE; STABILITY; POLYANILINE; CHEMISTRY; VOLTAGE; ANODES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/28867
- DOI
- 10.1002/ADFM.2006002
- ISSN
- 1616-301X
- Article Type
- Article
- Citation
- ADVANCED FUNCTIONAL MATERIALS, vol. 17, no. 3, page. 390 - 396, 2007-02-12
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- There are no files associated with this item.
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