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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Focus Session: Ultrafast Processes in Organic Semiconductors and Perovskites II (joint session O/CPP)
CPP 46.6: Talk
Thursday, March 21, 2024, 16:30–16:45, MA 004
THz Control of Coherent Phonon Dynamics in Low-Dimensional Hybrid Perovskites — •Joanna M. Urban1, Marie Cherasse1, Michael S. Spencer1, Maximilian Frenzel1, Charlotte Berrezueta Palacios2, Gaelle Trippe-Allard3, Abdelaziz Jouaiti4, Sylvie Ferlay4, Emmanuelle Deleporte3, Stephanie Reich2, Martin Wolf1, and Sebastian F. Maehrlein1 — 1Fritz Haber Institute of the Max Planck Society, Berlin, Germany — 2Institute of Experimental Physics, Freie Universität Berlin, Germany — 3Université Paris-Saclay, ENS Paris-Saclay, CentraleSupélec, CNRS UMR 9024, LuMIn, 91190 Gif-sur-Yvette, France — 4Université de Strasbourg-CNRS, UMR 7140, France
Charge carrier-phonon interaction governs the outstanding optoelectronic properties of hybrid lead halide perovskites (LHPs). Understanding their complex vibrational dynamics is crucial for harnessing their full potential. Recently, we used intense THz pulses to nonlinearly drive octahedral twist modes in 3D LHPs, demonstrating coherent lattice control at ultrafast timescales [1]. Low-dimensional hybrid LHPs combine the intriguing properties of the soft, polar, and anharmonic lattice with quantum confinement effects arising from the reduced dimensionality. We study quasi-2D layered Ruddlesden-Popper perovskites and 1D hybrid perovskite-like metal halides by THz Kerr Effect spectroscopy and analyze the changes of lattice dynamics with dimensionality reduction, towards a better understanding of exciton self-trapping and charge carrier screening.
References: [1] Frenzel et al., Sci. Adv.9, eadg3856 (2023)
Keywords: THz Kerr effect; Coherent Phonons; 2D Perovskites; Lattice Dynamics