Thermally Activated Delayed Fluorescence in a Y(3)N@C(80) Endohedral Fullerene: Time‐Resolved Luminescence and EPR Studies

The endohedral fullerene Y(3)N@C(80) exhibits luminescence with reasonable quantum yield and extraordinary long lifetime. By variable‐temperature steady‐state and time‐resolved luminescence spectroscopy, it is demonstrated that above 60 K the Y(3)N@C(80) exhibits thermally activated delayed fluoresc...

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Detalles Bibliográficos
Autores principales: Zalibera, Michal, Krylov, Denis S., Karagiannis, Dimitrios, Will, Paul‐Anton, Ziegs, Frank, Schiemenz, Sandra, Lubitz, Wolfgang, Reineke, Sebastian, Savitsky, Anton, Popov, Alexey A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2017
Materias:
Communications
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5751888/
https://www.ncbi.nlm.nih.gov/pubmed/29119650
http://dx.doi.org/10.1002/anie.201710637
Descripción
Sumario:The endohedral fullerene Y(3)N@C(80) exhibits luminescence with reasonable quantum yield and extraordinary long lifetime. By variable‐temperature steady‐state and time‐resolved luminescence spectroscopy, it is demonstrated that above 60 K the Y(3)N@C(80) exhibits thermally activated delayed fluorescence with maximum emission at 120 K and a negligible prompt fluorescence. Below 60 K, a phosphorescence with a lifetime of 192±1 ms is observed. Spin distribution and dynamics in the triplet excited state is investigated with X‐ and W‐band EPR and ENDOR spectroscopies and DFT computations. Finally, electroluminescence of the Y(3)N@C(80)/PFO film is demonstrated opening the possibility for red‐emitting fullerene‐based organic light‐emitting diodes (OLEDs).

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