Organic Solar Cells: Significantly Reduced Bimolecular Recombination in a Novel Silole‐Based Polymer: Fullerene Blend (Adv. Energy Mater. 6/2011)

The inside cover depicts a polymer:fullerene solar cell based on a novel silole-based donor:acceptor copolymer. On p. 1062, Tracey M. Clarke, A. J. Mozer and co-workers show a significant reduction in bimolecular recombination coefficient compared to the expected Langevin model, which allows larger drift lengths and consequently, the coating of thick photoactive layers without significant drop in the electrical fill factor.