Research

The goal of the Photochemical Dynamics Group’s research program is to contribute to the advancement of solar energy conversion science and technology through basic research. Currently, we focus on the preparation and characterization of photovoltaic and photocatalytic systems, as well as on the understanding of the underlying mechanisms.

In this context, it is particularly interesting to elucidate the dynamics of fundamental processes (such as photoinduced electron transfer, charge transport, energy transfer and relaxation), which prevail in nanomaterials and their interfaces. These processes are not only essential to the functioning of the studied systems, but may also be relevant for many other materials and applications. We aim at achieving a fundamental understanding of these phenomena by designing experiments that can be used to test and alter modern theory and computational modeling.

We utilize time-resolved spectroscopic techniques to investigate these phenomena. Identification of reaction intermediates and quantification of the kinetics of photoinduced reactions are achieved by the application of a combination of various experimental methods. These include femtosecond-, picosecond- and nanosecond pulsed laser excitation, coupled to various ultrafast transient absorbance, diffuse reflectance, nonlinear second harmonic generation, and fluorescence upconversion probing techniques applicable to transparent, scattering and opaque samples. Linear terahertz time-domain spectroscopy (THz-TDS) and optical pump-THz probe (OPTP), both in transient transmission and reflectance modes, allow for studying low frequency vibrations in molecules, solvents, solids, and supramolecular systems, as well as charge carriers dynamics, mobility and transport mechanisms in nanomaterials with sub-picosecond time-resolution.
 

See our group homepage for a more detailed description of the various research projects.