Ambipolar charge transport in non-peripherally substituted octahexyl zinc phthalocyanine Nandu B. Chaure, Seema Barard, Asim K. Ray, Andrew N. Cammidge and Michael J. Cook EPL, 104 5 (2013) 57005 Published online: 19 December 2013 DOI: 10.1209/0295-5075/104/57005