Polymer-Fullerene Bulk-Heterojunction Solar Cells

Solution‐processed bulk‐heterojunction solar cells have gained serious attention during the last few years and are becoming established as one of the future photovoltaic technologies for low‐cost power production. This article reviews the highlights of the last few years, and summarizes today's state‐of‐the‐art performance. An outlook is given on relevant future materials and technologies that have the potential to guide this young photovoltaic technology towards the magic 10% regime. A cost model supplements the technical discussions, with practical aspects any photovoltaic technology needs to fulfil, and answers to the question as to whether low module costs can compensate lower lifetimes and performances. Solution‐processed bulk‐heterojunction solar cells, their advancement over the past few years, and the current state‐of‐the‐art devices are reviewed here. Photovolatic devices that utilize such technology are highly promising for future low‐cost power production. Future materials and methods necessary to obtain 10% efficiency are considered, as is a cost analysis that offsets module costs with low device lifetime and performance.