Unusual enhancement of dye luminescence by exciton resonance of J-Aggregates
| Autor: | Alexander V. Sorokin, Irina I. Grankina, I. A. Borovoy, Yuri V. Malyukin, Iryna Yu. Ropakova, Svetlana L. Yefimova |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Exciton 02 engineering and technology 010402 general chemistry 01 natural sciences Molecular physics Inorganic Chemistry Condensed Matter::Materials Science Molecule Physics::Atomic Physics Electrical and Electronic Engineering Physical and Theoretical Chemistry J-aggregate Spectroscopy Condensed Matter::Quantum Gases Condensed Matter::Other Organic Chemistry Resonance 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Förster resonance energy transfer Absorption band 0210 nano-technology Luminescence Excitation |
| Zdroj: | Optical Materials. 96:109263 |
| ISSN: | 0925-3467 |
| Popis: | In this study, we report an effective excitation energy transfer from J-aggregates to exciton traps (specially selected dye molecules) located within different polymer layers by Forster resonance energy transfer mechanism. With an increase in the distance d between the layer of J-aggregates and that of the exciton traps, the intensity of the traps luminescence reaches a maximum at the certain spacer layer thickness, instead of a gradual decrease according to the Forster law ~ d−6, and then drops down. Moreover, the decay time of the traps luminescence synchronously changes, reaching its maximum at the maximum of the traps luminescence. The observed effect takes place for different types of J-aggregates and exciton traps and even at the direct excitation into the traps absorption band. Despite that, the critical distance between J-aggregates and exciton traps, at which the maximum of the traps luminescence and its highest decay time are observed, was nearly the same for all J-aggregates – exciton traps pairs. |
| Databáze: | OpenAIRE |
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