SMART-X Stockholm Network Symposium

ULTRAFAST X-RAY SPECTROSCOPY OF PEROVSKITE SEMICONDUCTORS

8 Apr 2021, 13:00

1h

ESR Poster ESR Poster Session ESR Poster Session

Speaker

Ms Stavroula Vovla (Dipartimento di Fisica, Politecnico di Milano, Milano, Italy / Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche, Milano, Italy)

Description

With rapid technological developments in the last twenty years, semiconductors’ functionality in various applications has led the scientific community to intensive study of perovskites. In particular, the focus is on halide perovskites, since they display an attractive set of properties for radiation detection devices, solar cells and photovoltaic systems.
As such, my PhD project will focus on the investigation of photo-induced ultrafast dynamics in perovskite semiconductors, namely MAPbI3 and MAPbBr3, by femtosecond Near Edge X-ray Absorption Fine Structure (NEXAFS). By opting for this spectroscopic technique, I expect to gain insight in the photo-induced ultrafast dynamics triggered in these materials by femtosecond visible and UV pump. Particular emphasis will be given on the dependence of the photo-physical properties and charge transport properties on the chemical composition and the presence/type of defects in perovskite semiconductors. What is more, changes in carrier dynamics between 3D and 2D perovskites can be of great interest and are included in the project plans.
This project will be implemented and described within the SMART-X network. SMART-X is a multidisciplinary and inter-sectoral MSCA-ITN network aiming at the training of scientists who will bring X-ray ultrafast spectroscopy beyond the current state of the art as a standard technique for investigation in crucial sectors of material science, with a particular emphasis on the investigation of charge carrier dynamics in materials relevant for novel energy supply and storage.