Regensburg 2022 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 48: Electrical, Dielectrical and Optical Properties of Thin Films (joint session CPP/KFM)

CPP 48.4: Talk

Friday, September 9, 2022, 12:15–12:30, H38

Exciton dynamics in surface-mounted metal-organic frameworks: A femtosecond transient absorption study — •Vipilan Sivanesan¹, Martin Richter¹, Debkumar Rana¹, Ritesh Haldar², Christoph Wöll², and Petra Tegeder¹ — ¹Physikalisch-Chemisches Institut, Universität Heidelberg, Germany — ²Institute of Functional Interfaces, Karlsruhe Institute of Technology, Germany

For the optimization of organic optoelectronic devices, it is important to understand the ultrafast electronically excited state dynamics in organic semiconductors after optical excitation. For instance, different molecular packing and relative orientations of the optically active chromophores can affect the excitonic coupling strength. This can be studied in crystalline molecular assemblies by integrating these chromophores into surface-mounted metal-organic frameworks (SURMOFs) as organic linkers. Varying the side-groups of the molecules enables to engineer the crystal structure to tune the excitonic coupling. To analyse the influence of this crystal engineering on the ultrafast dynamics we investigated thin films of chromophore functionalized Zn-SURMOF by means of femtosecond transient absorption.