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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 3: Molecular Electronics and Excited State Properties I
CPP 3.6: Vortrag
Montag, 16. März 2020, 10:45–11:00, ZEU 260
Photophysics of tetracene-pentacene blends — •Clemens Zeiser1, Luca Moretti2, Margherita Maiuri2, Giulio Cerullo2, and Katharina Broch1 — 1Insititute for Applied Physics, University of Tübingen, Germany — 2Department of Physics, Polytecnic Unitversity of Milan, Italy
Pentacene (PEN) and tetracene (TET) are prototypical compounds for the investigation of singlet fission (SF), a process that has been extensively studied in the last decade due to its potential application in solar cells. [1] Most studies on SF examine thin films, nanoparticles, single crystals or solutions of neat compounds, and only few studies on doped single crystals and mixed thin films have been reported [2,3]. In this study we investigate the photophysics of mixed films of PEN and TET using transient absorption spectroscopy. We find the lowest excited singlet and triplet states in PEN:TET blends to be delocalized over both compounds and will discuss the implications for the singlet fission dynamics in these blends.
[1] M. Smith et al., Chem. Rev. 110, 6891 (2010)
[2] N. Geacintov et al., Chem. Phys. Lett. 11, 504 (1971)
[3] V. O. Kim et al., J. Chem. Phys., 151, 164706 (2019)