Regensburg 2022 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 28: Organic Semiconductors 1

HL 28.3: Talk

Thursday, September 8, 2022, 10:00–10:15, H34

Laser induced fluorescence spectroscopy of TIPS pentacene attached to rare gas cluster — •Michelbach Moritz, Demianenko Alexander, Hartweg Sebastian, and Stienkemeier Frank — Institute of Physics, University of Freiburg, Germany

In the recent years bis(triisopropylsilylethynyl (TIPS)) pentacene has gained interest in the field of singlet fission. Originally developed for field-effect transistors, the TIPS side groups of the pentacene lead to favourable intermolecular orientation, high hole mobility in thin films and better solubility in organic solvents [1]. We present a comparison study of the pentacene and its derivate, in which we cover the energetic structure of the excited states, the influence of the surrounding medium and the effect of neighbouring molecules. Especially the collective effects are investigated with a lifetime analysis and give a direct hint for lifetime reducing effects like superradiance and singlet fission [2], [3].

[1] Giri et. al., Nature 480, 504-508 (2011)

[2] Bohlen, M. et al., J. Chem. Phys. 156, 034305 (2022)

[3] Izadnia, S. et al.. J. Phys. Chem. Lett. 8, 2068*2073 (2017)