Organic semiconductors are promising materials for future optoelectronic devices and can be divided into two general classes: small molecules and polymers.
We study the optical properties and the photophysics of these materials, prepared with molecular beam deposition, using time-resolved ultrafast optical spectroscopy (transient absorption spectroscopy, time-resolved photoluminescence spectroscopy, time-correlated single photon counting), spectroscopic ellipsometry, temperature dependent NIR-vis-UV spectroscopy and temperature dependent photoluminescence spectroscopy.
The main focus of our research is on singlet fission, a multi-exciton generation process converting on excited singlet state into two triplets, which we study in blends of small molecules prepared by coevaporation.