We are dealing with the interactions of electrons and photons with solid materials such as semiconductors. One goal is to examine and understand the underlying physical principles. The developed methods and materials are then optimized for practical application. Our focus lies on the physics of low-dimensional systems such as two-dimensional materials, molecules or quantum dots. Furthermore, we are strongly engaged in battery and solar energy research. Students have the possibility to take part in lectures and lab courses or join one of our research groups for pursuing a thesis.