Femtosecond Pump-Probe Spectrometer
Femtosecond transient absorption spectroscopy allows us to measure processes that occur on the picosecond timescale. Examples of these processes are: excited state energy transfer, inter- and intramolecular electron transfer reactions, charge transfer complexation and radical recombination in aqueous and nonaqueous solvents as well as in heterogeneous systems such as colloidal suspensions and thin films. We use the system mainly for measuring energy and electron transfer processes (both in colloidal suspensions and on thin films) in order to better understand how to construct photovoltaic devices. This spectroscopic method allows us to simultaneously record kinetic and spectral data regarding the excited state decay of our materials of interest.