During my undergraduate studies in Munich I discovered organic electronics to be a promising field. Specifically, very cheap, flexible and disposable organic solar cells could lead to a new and sustainable energy source. In my PhD in Cambridge I plan to explore the physics behind singlet exciton fission in organic materials and its use in photovoltaics to reach efficiencies beyond the Shockley-Queisser limit. The final goal is to obtain an understanding of the physics behind singlet exciton fission and the dynamics of the resulting triplet excitons. Most importantly, I want to use this insight to design new systems with lower losses in excitonic energy transport and to exploit the potential of singlet fission for the efficiency to go beyond the Shockley-Queisser limit. Considering the cheap production costs, higher efficiencies can make organic solar cells attractive for large-scale use. In my PhD I would like to contribute to such a sustainable energy source.