Fluorene‐Based Co‐polymer with High Hole Mobility and Device Performance in Bulk Heterojunction Organic Solar Cells. Issue 14 (5th June 2013) - Watters, Darren C.
Abstract A new donor–acceptor polymer based on 9, 9‐dioctylfluorene is synthesized and tested in organic photovoltaic devices. Results show that the polymer exhibits good solubility in a range of organic solvents and has a high hole mobility. When blended with a PC70BM acceptor and fabricated into a bulk heterojunction, photovoltaic devices having a maximum power conversion efficiency (PCE) of 6.2% and a peak external quantum efficiency of 74% are created. Such efficiencies are realized without any necessity for solvent additives or thermal annealing protocols.