Stefan studied Electronic Engineering and Micro- and Nanotechnology in Switzerland and Austria, respectively. He conducted his Masterthesis under supervision of Prof. Sariciftci at the institute of Physical Chemistry in Linz (AU) in 2011, where he was working on characterization methods of solution processed organic solar cells. In his PhD he investigated new approaches to lower the voltage losses of organic photovoltaics. He simulated and measured the anisotropic dielectric constant of organic ladder polymers with electronic and ionic contributions. Further, based on density functional theory (DFT) methods, he showed new approaches the lower the exciton binding energy by different arrangements of donor and acceptor molecules. He conducted his PhD in the group of Professor Leo in Physics at the Technical University in Dresden, and defended his thesis in November 2015. In 2016 he joined the group of Professor Cuniberti, where he aims to calculate the exciton binding energy of extended donor-acceptor molecules.