MFD Seminar: Dr. Marina Filip | Understanding Excitons in Chemically and Structurally Heterogeneous Semiconductors

Speaker: Dr. Marina Filip, Oxford University

Talk Title: Understanding Excitons in Chemically and Structurally Heterogeneous Semiconductors

Abstract: In the first part of the talk, studies of exciton delocalization in several heterogeneous semiconductors within the broader family of halide perovskites will be presented. The discussion will include a recent analysis of optical excitations in quasi-two-dimensional (quasi-2D) organic-inorganic halide perovskites and demonstrate how subtle structural features can significantly impact exciton delocalization in these systems. In the second part of the talk (time permitting), a new methodological development will be introduced that generalizes the Bethe-Salpeter equation (BSE) to account for the influence of ionic vibrations on the dielectric screening of excitons. This approach allows for the computation of the rate of exciton dissociation upon scattering with phonons.

Biography: Marina Filip is an Associate Professor of Condensed Matter Physics at the University of Oxford and a Tutorial Fellow in Physics at University College, Oxford. Before joining the Oxford Physics faculty in February 2020, Marina was a postdoctoral scholar in the Physics Department at UC Berkeley and  Lawrence Berkeley National Laboratory (2018-2020) and the Materials Department at the University of Oxford (2015-2018). Marina received her doctorate in Materials Science from the University of Oxford in 2016, and completed her undergraduate studies in Physics, at the University of Bucharest, Romania. Marina was recently awarded the 2024 IUPAP Early Career Scientist Prize in Semiconductor Physics, and is currently visiting Berkeley as a Somorjai Miller Visiting Professor.

Host: Dr. Zhenglu Li

More Information: Seminar_Marina-Filip.pdf

Location: Kaprielian Hall (KAP) - 145

Audiences: Everyone Is Invited

Contact: Candy Escobedo