Hybrid Graphene‐Metal Oxide Solution Processed Electron Transport Layers for Large Area High‐Performance Organic Photovoltaics

Organic photovoltaics (OPVs) are receiving considerable attention due to their potential as a source of renewable energy.1,2 Compared to conventional silicon-based photovoltaics, they are lightweight, flexible, and are compatible with low-temperature solution-based processing techniques resulting in a considerable cost reduction over contemporary devices. In the last few years, high performance polymer solar cells based on bulk heterojunction (BHJ) structures have been reported with efficiencies up to 10% providing impetus for the next generation organic photovoltaic devices leading to 4th generation (4G) hybrid solar cells3 and their successful commercialization.3–7