Stable solution processed hole injection material for organic light-emitting diodes |
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| Authors: | Szuheng Ho Chaoyu Xiang Rui Liu Neetu Chopra Mathew Mathai Franky So |
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| Affiliation: | 1. Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA;2. Plextronics Inc., 2180 William Pitt Way, Pittsburgh, PA 15238, USA |
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| Abstract: | A new aqueous based polymer, Plexcore® OC AQ1200 (AQ1200) was used as a hole injection layer (HIL) in organic light emitting diodes (OLEDs) and the device results are compared with polyethylene dioxythiophene:polystyrene sulfonate (PEDOT:PSS) in terms of injection efficiency and stability. Dark injection transient measurements show a higher injection efficiency in hole-only devices using AQ1200 HIL compared with PEDOT:PSS. Using AQ1200 as an HIL, high efficiency phosphorescent OLEDs are demonstrated to have a long lifetime, with an estimated operational half lifetime (LT 50) of more than 8000 h from an initial luminance of 1000 cd/m2. |
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| Keywords: | Hole injection layer Organic light emitting diode Dark injection Injection efficiency Air-stability Lifetime |
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