Photophysics and morphology of a polyfluorene donor–acceptor triblock copolymer for solar cells (pages 1705–1718)
Chao Yan, Ashley J. Cadby, Andrew J. Parnell, Weihua Tang, Maximilian W. A. Skoda, David Mohamad, Simon P. King, Luke X. Reynolds, Saif A. Haque, Tao Wang, Steven R. Parnell, Andrew B. Holmes, Richard A. L. Jones and David J. Jones
Article first published online: 25 SEP 2013 | DOI: 10.1002/polb.23386
Polyfluorene (PFM)-based polymers are regularly used for organic electronics applications; this study examines the use of the PFM-based PFM-F8BT-PFM donor–acceptor triblock copolymer in organic photovoltaic (OPV) devices. The triblock copolymer exhibits exciplex emission, which necessitates a geminate polar pair; long-lived exciplex states are detrimental in OPVs. The triplet yield in the triblock and the blend is measured, with the triblock generating a triplet population twenty 20 times that of the blend.