5,10-Dihydrobenzo[a]indolo[2,3-c]carbazoles as Novel OLED EmittersClick to copy article linkArticle link copied!
- Flip de JongFlip de JongMolecular Imaging and Photonics, Department of Chemistry, KU Leuven Chem&Tech, Celestijnenlaan 200F, B-3001 Leuven, BelgiumMore by Flip de Jong
- Mathias DanielsMathias DanielsMolecular Design and Synthesis, Department of Chemistry, KU Leuven Chem&Tech, Celestijnenlaan 200F, B-3001 Leuven, BelgiumMore by Mathias Daniels
- Luis Vega-CastilloLuis Vega-CastilloDepartamento de Química Física y Termodinámica Aplicada, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUQFN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, SpainMore by Luis Vega-Castillo
- Koen Kennes*Koen Kennes*E-mail: [email protected] (K.K.).Molecular Imaging and Photonics, Department of Chemistry, KU Leuven Chem&Tech, Celestijnenlaan 200F, B-3001 Leuven, BelgiumMore by Koen Kennes
- Cristina Martín*Cristina Martín*E-mail: [email protected] (C.M.).Molecular Imaging and Photonics, Department of Chemistry, KU Leuven Chem&Tech, Celestijnenlaan 200F, B-3001 Leuven, BelgiumDepartamento de Química Física, Facultad de Farmacia, Facultad de Farmacia, Universidad de Castilla-La Mancha, Campus Universitario, 02071 Albacete, SpainMore by Cristina Martín
- Gustavo de MiguelGustavo de MiguelDepartamento de Química Física y Termodinámica Aplicada, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUQFN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, SpainMore by Gustavo de Miguel
- Manuel CanoManuel CanoDepartamento de Química Física y Termodinámica Aplicada, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUQFN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, SpainMore by Manuel Cano
- Marta Pérez-MoralesMarta Pérez-MoralesDepartamento de Química Física y Termodinámica Aplicada, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUQFN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, SpainMore by Marta Pérez-Morales
- Johan HofkensJohan HofkensMolecular Imaging and Photonics, Department of Chemistry, KU Leuven Chem&Tech, Celestijnenlaan 200F, B-3001 Leuven, BelgiumMore by Johan Hofkens
- Wim DehaenWim DehaenMolecular Design and Synthesis, Department of Chemistry, KU Leuven Chem&Tech, Celestijnenlaan 200F, B-3001 Leuven, BelgiumMore by Wim Dehaen
- Mark Van der AuweraerMark Van der AuweraerMolecular Imaging and Photonics, Department of Chemistry, KU Leuven Chem&Tech, Celestijnenlaan 200F, B-3001 Leuven, BelgiumMore by Mark Van der Auweraer
Abstract
The excited-state dynamics of four 5,10-dihydrobenzo[a]indolo[2,3-c]carbazoles in solution and in films were studied with stationary and time-resolved spectroscopies. The solvent dependency of the photophysics reveals no appreciable dipole moment in the ground state. In the excited state, electron-withdrawing substituents contribute to an outspoken charge-transfer character. In films, although the molecules are mostly present as monomers, the excited-state dynamics are characterized by a cascade of energy-transfer processes to excited dimers and aggregates which dominate the photoluminescence (PL) spectra. The properties of the aggregates depend on the used substituents. The electroluminescence spectra obtained from single-layer and multilayer devices mostly resemble the PL spectra, but show contributions from other species such as electromers or electroplexes. It is inferred that the different substituents lead to a different packing of the carbazole moieties, each of which has different mobilities and recombination probabilities.
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