Fabricating High Performance, Donor–Acceptor Copolymer Solar Cells by Spray-Coating in Air (pages 505–512)
Tao Wang, Nicholas W. Scarratt, Hunan Yi, Alan D. F. Dunbar, Andrew J. Pearson, Darren C. Watters, Tom S. Glen, Andrew C. Brook, James Kingsley, Alastair R. Buckley, Maximilian W. A. Skoda, Athene M. Donald, Richard A. L. Jones, Ahmed Iraqi and David G. Lidzey
Article first published online: 5 FEB 2013 | DOI: 10.1002/aenm.201200713
High performance organic solar cells from the blend of donor–acceptor copolymers and PC70BM were made by spray-coating the photoactive layer in air. A high power conversion efficiency of 5% was achieved after device optimization. Neutron scattering measurements show that vertical stratification occurs during the film drying process, and the concentration of PCBM reduces towards the underlying PEDOT:PSS interface.