Regensburg 2019 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 57: Organic Electronics and Photovoltaics IV - Excitonic Properties and Light-Emitting Devices
CPP 57.8: Vortrag
Donnerstag, 4. April 2019, 17:00–17:15, H18
Coherent dynamics of ultrafast singlet fission in Pentacene — •Ajay Jha1, Hong-Guang Duan1,2,3, Xin Li4, Vandana Tiwari1, Hanyang Ye5, Pabitra Nayak5, Xiao-Lei Zhu4, Zheng Li1, Todd Martinez4, Michael Thorwart2,3, and R. J. Dwayne Miller1,3,6 — 1MPSD, Hamburg, Germany — 2I. Institut für Theoretische Physik, UH, Germany — 3CUI, Hamburg, Germany — 4Stanford University, US — 5University of Oxford, UK — 6University of Toronto, Canada
Singlet fission is one of the possible ways to circumvent the Shockley-Queisser limit on efficiency. Pentacene and its derivatives have shown great promise towards their application in devices to harness photons for carrier multiplication via singlet fission process. Here we study the singlet fission process in a pentacene thin film using a combination of transient-grating and two-dimensional electronic spectroscopy complemented by quantum chemical and nonadiabatic dynamics calculations. Our study reveals that along with the high-frequency vibrations, intermolecular rocking motions drive the ultrafast dynamics at the multidimensional conical intersection in the singlet fission process.