Exciton dynamics in blends of phosphorescent emitters
| Autor: | Manuel Thesen, Christoph Schütz, Silvia Janietz, Frank Jaiser, Bianca Höfer, Anna Köhler, Hartmut Krueger |
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| Rok vydání: | 2008 |
| Předmět: |
chemistry.chemical_classification
Quantitative Biology::Biomolecules business.industry Chemistry Exciton Astrophysics::Cosmology and Extragalactic Astrophysics Polymer Green-light Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention law Astrophysics::Solar and Stellar Astrophysics Molecule Optoelectronics Polymer blend Phosphorescence business Common emitter Light-emitting diode |
| Zdroj: | physica status solidi (b). 245:810-813 |
| ISSN: | 1521-3951 0370-1972 |
| Popis: | Cascading energy transfer is a usually undesired effect in organic-host guest systems that are designed for light-emitting purposes. Here we demonstrate a chemical approach to suppressing undesired energy transfer from the blue to the red emitter in multicomponent polymer blends. We have combined a red, green and blue emitting Ir-complex each with charge transporting molecules to a side-chain copolymer. The covalent attachment of the phosphorescent emitter is found to prevent cascading energy transfer through steric shielding. This approach approximately doubles the efficiency and brightness of polymer light emitting diodes. |
| Databáze: | OpenAIRE |
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