Improving the efficiency of organic solar cells with graphene transparent electrode and light management: A simulation study

In this work, we provide fabrication guidelines to obtain high efficient organic solar cells exploiting graphene as substitute to ITO transparent electrode. The design is performed through multi-scale simulations, ranging from the atomistic level by means of ab-initio calculations of the contact, up to the device level through drift-diffusion models, including also excitonic transport. Optical modelling has also been performed in order to investigate enhancement of the solar cell efficiency through proper contact patterning. We will show that an efficiency improvement in excess of 30% with respect to the reference cell is achievable.