Singlet exciton fission via an intermolecular charge transfer state in 
coevaporated pentacene-perfluoropentacene thin films

Kim, Vincent O.; Broch, Katharina; Belova, Valentina; Chen, Y. S.; Gerlach, Alexander; Schreiber, Frank; Tamura, Hiroyuki; Valle, Raffaele Guido Della; D’Avino, Gabriele; Salzmann, Ingo; Beljonne, David; Rao, Akshay; Friend, Richard

doi:10.1063/1.5130400

Datensatz

DATENSATZ AKTIONENEXPORT

Zur Ablage hinzufügen

Lokale TagsFreigabegeschichteDetailsÜbersicht

Freigegeben

Zeitschriftenartikel

Singlet exciton fission via an intermolecular charge transfer state in coevaporated pentacene-perfluoropentacene thin films

MPG-Autoren

/persons/resource/persons199243

Broch, Katharina
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

Externe Ressourcen

Es sind keine externen Ressourcen hinterlegt

Volltexte (beschränkter Zugriff)

Für Ihren IP-Bereich sind aktuell keine Volltexte freigegeben.

Volltexte (frei zugänglich)

1.5130400.pdf
(Verlagsversion), 4MB

Ergänzendes Material (frei zugänglich)

Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar

Zitation

Kim, V. O., Broch, K., Belova, V., Chen, Y. S., Gerlach, A., Schreiber, F., et al. (2019). Singlet exciton fission via an intermolecular charge transfer state in coevaporated pentacene-perfluoropentacene thin films. The Journal of Chemical Physics, 151(16): 164706. doi:10.1063/1.5130400.

Zitierlink: https://hdl.handle.net/21.11116/0000-0005-7485-2

Zusammenfassung

Singlet exciton fission is a spin-allowed process in organic semiconductors by which one absorbed photon generates two triplet excitons. Theory predicts that singlet fission is mediated by intermolecular charge-transfer states in solid-state materials with appropriate singlet-triplet energy spacing, but direct evidence for the involvement of such states in the process has not been provided yet. Here, we report on the observation of subpicosecond singlet fission in mixed films of pentacene and perfluoropentacene. By combining transient spectroscopy measurements to nonadiabatic quantum-dynamics simulations, we show that direct excitation in the charge-transfer absorption band of the mixed films leads to the formation of triplet excitons, unambiguously proving that they act as intermediate states in the fission process.