Evidence for phase formation in potassium intercalated 1,2;8,9-dibenzopentacene F. Roth, A. König, B. Mahns, B. Büchner and M. Knupfer Eur. Phys. J. B, 85 7 (2012) 242 Published online: 16 July 2012 DOI: 10.1140/epjb/e2012-30247-3