Electroluminescence of (styrene-co-acrylic acid) ionomer/conjugated MEH-PPV blends
| Autor: | Teresa D. Z. Atvars, Ali Cirpan, Leni Akcelrud, R. F. Cossiello, Frank E. Karasz |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Mechanical Engineering Metals and Alloys Electroluminescence Condensed Matter Physics Methacrylate Miscibility Electronic Optical and Magnetic Materials Styrene chemistry.chemical_compound chemistry Mechanics of Materials Polymer chemistry Materials Chemistry Copolymer Polymer blend Ionomer Nuclear chemistry Acrylic acid |
| Zdroj: | Synthetic Metals. 158:219-225 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/j.synthmet.2008.01.011 |
| Popis: | This work reports the electroluminescence of poly[2-methoxy-5(2′-ethylhexyloxy)- p -phenylenevinylene] (MEH-PPV) and poly(styrene- co -acrylic acid- co -1-pyrenylmethyl methacrylate) (SAA) blends in ratios from 0 to 100 wt.% in mass of MEH-PPV. The styrene- co -acrylic copolymer was synthesized with 3 mol% of acrylic acid units to simultaneously enhance blend miscibility and charge transport in MEH-PPV. The morphology was studied using epifluorescence microscopy and scanning electron microscopy in which the pyrenyl-labeled copolymer is used to enhance microscopic contrast. Device performances were compared: those using MEH-PPV have a turn-on voltage of 3.5 V, luminance of 500 cd/m 2 and current density of 430 mA/cm 2 at 5 V, while MEH-PPV blended with 50 wt.% styrene–acrylic copolymer showed a turn-on voltage of 2.5 V, a luminance of 2300 cd/A and a current density of 640 mA/cm 2 at 5 V. |
| Databáze: | OpenAIRE |
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