SKM 2023 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 10: Materials for Storage and Conversion of Energy: New Storage Materials

MM 10.4: Vortrag

Montag, 27. März 2023, 16:30–16:45, SCH A 215

Vibronic quantum coherences in orthorhombic lead halide perovskite — •Ajay Jha^1,2, Zihui Liu⁵, Vandana Tiwari², Pabitra Nayak³, Henry Snaith³, Xian-Ting Liang⁵, R. J. Dwayne Miller⁴, and Hong-Guang Duan⁵ — ¹Rosalind Franklin Institute, Didcot, UK — ²MPI-Structure and Dynamics of Matter, Hamburg, Germany — ³University of Oxford, Oxford, UK — ⁴University of Toronto, Toronto, Canada — ⁵Ningbo University, Ningbo, China

To unravel the quantum coherent dynamics in orthorhombic perovskite, we employ the ultrafast two-dimensional coherent spectroscopy in methylammonium lead iodide perovskite at 15 K. The data clearly resolve the exciton and carrier band in perovskite along with the interaction between exciton and carriers by observation of cross peaks. The ultrafast population transfer from charge carriers to exciton in perovskite is associated with the vibrational coherences. The nature and role of these coherences will be discussed in detail.