Vitamin Supplements for Stable Organic Solar Cells

Organic solar cells have recently broke the power conversion efficiencies limit of 20 %. This puts extra attention to increasing their stability as their last remaining challenge. Since they consist of organic molecules, they are susceptible to degradation in contact with oxygen, light, heat and humidity, which are commonly found stresses in their working environment.
Different pathways can be explored to enhance their stability; we will present several explored by our group on different non-fullerene based devices: antioxidant-assisted stabilization of active layer and interlayer, molecule purification, molecular structure modifications, device architecture. We will discuss the observed enhancement in stability and use microscopic and spectroscopic techniques to probe the mechanisms.