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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 2: Molecular Electronics - organized by Derck Schlettwein (Justus Liebig University Giessen, Giessen)
CPP 2.6: Hauptvortrag
Montag, 22. März 2021, 11:00–11:40, CPPa
Singlet fission in blends of organic semiconductors — •Katharina Broch1, Clemens Zeiser1, Luca Moretti2, Chad Cruz3, Giulio Cerullo2, Roel Tempelaar4, and Christopher Bardeen3 — 1Institute for Applied Physics, University of Tübingen, Germany — 2Department of Physics, Polytechnic University of Milan, Italy — 3Department of Chemistry, University of California at Riverside, USA — 4Department of Chemistry, Northwestern University, USA
Singlet fission (SF), the photophysical process converting an singlet state into two triplets, is a promising approach to boost solar cell efficiencies [1], and is, due to a triplet-pair state intermediate, also interesting from the viewpoint of fundamental research. SF rates are controlled by the interplay of intermolecular interactions, energetics and electron-phonon coupling and a controlled modification of these parameters is key to a fundamental understanding of this complex process. Blends of organic semiconductors present an interesting alternative to established methods of chemical functionalization [2,3] and their potential for the study and control of SF pathways will be discussed using two examples of acene blends [3,4].
[1] M. B. Smith, J. Michl, Annu. Rev. Phys. Chem. 64 (2013); [2] D. Lubert-Perquel et al., Nat. Commun. 9 (2018); [3] K. Broch et al., Nat. Commun. 9 (2018); [4] C. Zeiser et al., Angew. Chem. Int. Ed. 59 (2020)