Interplay of Fluorescence and Phosphorescence in Organic Biluminescent Emitters
Manifestación
- Autores
- Identificador
- 1162877
- Fecha de publicación
- 2017
- Forma obra
- Texto
- Lugar de producción
- The Journal of Physical Chemistry C, 2017
- Nota de edición
- Digitalización realizada por la Biblioteca Virtual del Banco de la República (Colombia)
- Materias
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- Ciencias naturales y matemáticas; Ciencias naturales y matemáticas / Física
- Organic semiconductor; Optical sensor; Biluminescence; BILUM; Simultaneous dual-state emitter; Singlet-triplet annihilation; Triplet-triplet annihilationroom temperature phosphorescence; RTP; Semiconductor physics
- Notas
-
- Colombia
- Colfuturo
- © Derechos reservados del autor
- Abstract: Biluminescent organic emitters show simultaneous fluorescence and phosphorescence at room temperature. So far, the optimization of the room-temperature phosphorescence in these materials has drawn the attention of research. However, the continuous-wave operation of these emitters will consequently turn them into systems with vastly imbalanced singlet and triplet populations, which is due to the respective excited-state lifetimes. This study reports on the exciton dynamics of the biluminophore NPB (N,N′-di(1-naphthyl)-N,N′-diphenyl-(1,1-biphenyl)-4,4-diamine). In the extreme case, the singlet and triplet exciton lifetimes stretch from 3 ns to 300 ms, respectively. Through sample engineering and oxygen quenching experiments, the triplet exciton density can be controlled over several orders of magnitude, allowing us to study exciton interactions between singlet and triplet manifolds. The results show that singlet−triplet annihilation reduces the overall biluminescence efficiency already at moderate excitation levels. Additionally, the presented system represents an illustrative role model to study excitonic effects in organic materials.
- Enlace permanente
- https://www.cervantesvirtual.com/obra/interplay-of-fluorescence-and-phosphorescence-in-organic-biluminescent-emitters-1162877
- Enlaces