Erlangen 2018 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 13: Posters 1: Ultrafast Spectroscopy

MO 13.13: Poster

Dienstag, 6. März 2018, 16:15–18:15, Orangerie

Ultrafast Transient Reflectivity on Metal Complexes — •Florian Bäppler1, Merten Grupe1, Lars Schüssler1, Christoph Riehn1,2, and Rolf Diller11TU Kaiserslautern, 67663 Kaiserslautern, Germany — 2Forschungszentrum OPTIMAS, 67663 Kaiserslautern, Germany

Photophysical properties can be drastically altered by the sample parameters, e.g. packing density, solid state, gas phase, solvent and temperature. Therefore, in order to optimize device efficiency and functionality, it is critical to investigate the sample in the same environment as in the application. Femtosecond transient absorption (fs-TA) in transmission is a well established method to study ultrafast photophysical processes in molecules. This method is limited to transparent samples.

However, for non-transparent samples such as crystals and pressed pellets, femtosecond transient reflectivity (fs-TR) can give unique insights into the ultrafast dynamics upon photoexcitation. Here, we present a recent study comparing photophysical dynamics of the bi-nuclear OLED-emitter Cu2I2MePyrPHOS[1] in solution, film and as pressed neat pellet, using both fs-TA alongside with fs-TR. A perspective on how fs-TR as a tool to investigate metal complexes can be applied and improved is given.

[1] F. Bäppler et al. PCCP, 2017

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