We report on solution-processible polymer solar cells (PSCs) fabricated on a papery substrate using carton. Highly conductive PEDOT: PSS was used as a bottom anode and planarization layer, and a semi-transparent top cathode was applied. This research could be an important approach to the development of all-solution-processible papery PSCs as well as paper electronics. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim