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O: Fachverband Oberflächenphysik
O 78: Focus Session: Ultrafast Processes in Organic Semiconductors and Perovskites I (joint session O/CPP)
Thursday, March 21, 2024, 10:30–13:00, MA 004
The fundamental processes determining the fate of excitons or charge carriers in organic semiconductors or perovskites are happening on an ultrafast timescale, i.e. 100 fs to 10 ps. This, for example, includes singlet-fission, excimer and polaron formation or hot carrier relaxation. Thus, for the development of efficient opto-electronic devices a deep understanding of the processes on this time scale is of utmost importance. Most importantly, theoretical and experimental methods must be combined to successfully decipher the studied phenomena as the many degrees of freedom in these soft matter materials often defy a straightforward explanation from the data. This Focus Session brings together theoretical and experimental scientists fostering an exchange of ideas on the various computational and experimental methods of the ultrafast sciences to the field of organic semiconductors and perovskites.
Organizers: Sebastian Hammer (U Montreal), Petra Tegeder (U Heidelberg)
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10:30 | O 78.1 | Topical Talk: Transport and trapping in molecular materials at the picosecond time scale — •Marina Gerhard |
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11:00 | O 78.2 | Fluctuations and exciton dynamics in molecular semiconductors — •Alexander Neef, Samuel Beaulieu, Sebastian Hammer, Shuo Dong, Tommaso Pincelli, Julian Maklar, R.Patrick Xian, Anke Krueger, Martin Wolf, Laurenz Rettig, Jens Pflaum und Ralph Ernstorfer |
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11:15 | O 78.3 | Efficient Intramolecular Singlet Fission in Weakly-Interacting Heterodimers — •Oskar Kefer, Lukas Ahrens, Jie Han, Jan Freudenberg, Frank Rominger, Andreas Dreuw, Uwe H. F. Bunz, and Tiago Buckup |
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11:30 | O 78.4 | Topical Talk: Ultrafast charge-transfer dynamics in organic and hybrid interfaces from first principles — •Caterina Cocchi |
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12:00 | O 78.5 | Charge separation in a porphyrin-based metal organic framework incorporating C60 fullerenes — •Martin Richter, Xiaojing Liu, Pavel Kolesnichenko, Christof Wöll, and Petra Tegeder |
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12:15 | O 78.6 | Ultrafast charge separation and band structure dynamics in metal-phthalocyanine/WSe2 heterostructures — •Gregor Zinke, Sebastian Hedwig, Benito Arnoldi, Martin Anstett, Martin Aeschlimann, and Benjamin Stadtmüller |
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12:30 | O 78.7 | Disentangling the multiorbital contributions of excitons by photoemission exciton tomography — •G. S. Matthijs Jansen, Wiebke Bennecke, Andreas Windischbacher, Ralf Hemm, David Schmitt, Jan Philipp Bange, Christian Kern, Daniel Steil, Sabine Steil, Marcel Reutzel, Martin Aeschlimann, Peter Puschnig, Benjamin Stadtmüller, and Stefan Mathias |
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12:45 | O 78.8 | Formation of charge-transfer excitons across the hybrid PTCDA/WSe2 interface — •Wiebke Bennecke, David Schmitt, Jan Philipp Bange, Ignacio Gonzalez Oliva, Anna Seiler, Lukas Renn, Mattis Langendorf, Daniel Steil, Sabine Steil, R. Thomas Weitz, Peter Puschnig, Claudia Draxl, Marcel Reutzel, G. S. Matthijs Jansen, and Stefan Mathias |