Considering the continually growing energy demands and concerns about climate change due to anthropogenic CO2 generated from fossil fuels, there has been a global endeavor to transition towards low-carbon renewable energy sources, particularly photovoltaic technologies. Organic solar cells (OSCs) are ideal candidates for low-cost PV technologies thanks to the possibility of large-scale device fabrication by solution printing or coating techniques. Though OSCs cells have achieved remarkable progress in the last few decades, stability, efficiency, and cost issues hinder their commercialization.