Théorique, numérique
The behavior of charge excitations in materials is a key process for optoelectronics technology, that raises numerous fundamental questions. In the field of photovoltaics (PV), semiconductor models based on the independent-particle picture can give precious insight but depend on adjustable parameters and are tailored to specific classes of materials. This limits their capability to make reliable predictions and to profit from the opportunities offered by many-body phenomena to achieve a breakthrough in the improvement of device efficiency. Electron-hole coupling, hot electrons coupled to phonons, and multiple exciton generation, are all challenging effects of the electronic interactions that can be turned into novel pathways for improved solar cells. Studying these effects will be at the core of an internship, which will be carried out in the theoretical spectroscopy group at LSI. For more information please visit: https://etsf.polytechnique.fr/. The project will be in collaboration with Matteo Gatti and Lucia Reining.