Séminaire

Friday 6 June 2025 à 11h00.

Optoelectronic and structural properties of halide perovskite semiconductors

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In this seminar, I will introduce the field of halide perovskite semiconductors with a focus on their structural properties. I will start with an brief overview of the basic properties of this class of materials and why they have generated so much interest as emerging photovoltaic technologies and now as nanocrystals for quantum light emission. I will then discuss their complex structural and vibrational properties which involve order-disorder phase transitions, dynamic disorder, overdamped phonon spectra and strong electron-phonon coupling. These aspects have been studied in my group by several experimental techniques, most notably inelastic neutron scattering and Brillouin scattering, by symmetry-based considerations and by specially developed density-functional methods
Simon Thébaud is an associate professor at the Foton Institute, INSA Rennes. He holds a PhD from the University of Lyon 1 in condensed matter physics on thermoelectric transport, under the supervision of Georges Bouzerar and Christophe Adessi. From 2019 to 2022, he was a postdoctoral associate at Oak Ridge National Laboratory, working mainly on thermal transport in disordered crystals. In 2022, as he was recruited as a professor at the Foton Institute in Rennes, France, he switched his main research topic to the physics and optoelectronics of halide perovskites.

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