Blue light-emitting diodes from a meta-linked 2,3 substituted alkoxy poly(p-phenylenevinylene)
| Autor: | Beng Sim Chuah, Stephen C. Moratti, Richard H. Friend, A.B. Holmes, Franco Cacialli |
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| Rok vydání: | 2000 |
| Předmět: |
Materials science
Mechanical Engineering Metals and Alloys Electroluminescence Condensed Matter Physics Cathode Electronic Optical and Magnetic Materials law.invention Anode Indium tin oxide Crystallography Mechanics of Materials law Polymer chemistry Materials Chemistry Copolymer Alkoxy group OLED Light-emitting diode |
| Zdroj: | Synthetic Metals. :155-158 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/s0379-6779(99)00336-7 |
| Popis: | We report the fabrication of blue-emitting organic LEDs based on a soluble poly(p-phenylenevinylene) (PPV) copolymer, which takes advantage of both meta linkages and of an unusual substitution pattern (2,3) of the solubilising alkoxy chains onto the aromatic ring, in order to blue-shift the radiative emission. We recorded turn-on fields of similar to 1.1 MV/cm and efficiencies up to 0.032 ed/A in sandwich structures utilising Ca cathodes and a plasma-treated indium tin oxide (ITO) anode, coated with a poly(3,4-ethylene dioxythiophene) transport layer. The 1931 Commission Internationale de L'Eclairage (CIE) coordinates of the electroluminescence spectrum are (0.1881, 0.1812) without any filtering and (0.137, 0.0666), i.e., suitable for full colour displays applications, after filtering away the emission extending beyond 510 nm. (C) 2000 Published by Elsevier Science S.A. All rights reserved. |
| Databáze: | OpenAIRE |
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