SAMOP 2021 – scientific programme
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MO: Fachverband Molekülphysik
MO 7: Poster 1
MO 7.9: Poster
Thursday, September 23, 2021, 17:30–19:30, P
Probing electronic dynamics in the pentacene-C60 complex doped in helium nanodroplets — •Audrey Scognamiglio, Nicolas Rendler, Lukas Bruder, Katrin Dulitz, and Frank Stienkemeier — Institute of Physics, University of Freiburg, Hermann-Herder Straße 3a, 79104 Freiburg-im-Breisgau
The motivation to study the pentacene-C60 complex arises from its relevance for organic photovoltaics (OPVs) research. OPVs are known to have high charge mobility1 and are predicted to have higher quantum efficiencies than inorganic photovoltaics, by overcoming the Shockley-Queisser limit 2,3. The helium nanodroplet matrix isolation technique offers the unique possibility to synthesize complexes of organic molecules in their low-energy states, while the interaction with the droplet is negligible. Experimental and theoretical studies show that after excitation via the S0→ S1 transition in pentacene, the charge is expected to transfer towards the exciton states of the complex within 100 fs to 5 ps4,5. Our approach is to measure the charge transfer dynamics occurring within the Pc-C60 complex embedded in helium nanodroplets by means of time-resolved two-color pump-probe spectroscopy using photoelectron imaging and ion time-of-flight spectrometry.
[1] Polym. Rev. 52, 1(2012) [2] Appl. Phys. Lett. 95, 033301(2009) [3] J. Am. Chem. Soc. 132, 12698 (2010) [4] Science 334, 1541 (2011) [5] J. Am. Chem. Soc. 136, 1599 (2014)