Electronic properties of Jahn-Teller and photoluminescence systems under pressure

Photoluminescence (PL) properties of materials containing transition-metal ions depend on a variety of structural factors such as electronic structure, site symmetry and neighbouring atoms. These factors play a crucial role for the occurrence PL i.e. the PL quantum yield. This work investigates different mechanisms leading to non-radiative deexcitation processes and whether they can be modified by applying high pressure.