Kamm, V., Battagliarin, G., Howard, I. A., Pisula, W., Mavrinskiy, A., Li, C., Müllen, K., & Laquai, F. (2011). Polythiophene: Perylene Diimide Solar Cells – the Impact of Alkyl-Substitution on the Photovoltaic Performance. Advanced Energy Materials, 1(2), 297-302.