Recent advances & perspectives in electron transport layer of organic solar cells for efficient solar energy harvesting

Organic Solar Cells (OSCs) represents as one of the most promising, economic & environmental friendly technology for solar energy conversion with ease in fabrication & minimal material usage. To become competitive in future, new innovations & breakthroughs are needed to enhance efficiency & stability of OSCs. This review summarizes research efforts & accomplishments to push devices power conversion efficiency. We address how the recent developments of the materials of photoactive layer, electron & hole transporting layer (ETL & HTL respectively) & different contact materials are building blocks for high performance OSCs with enhanced stability. Finally, to help researchers we present a brief summary & some perspectives to understand present challenges & opportunities in this emerging area of research.