Influence of polymer ionization potential on the open-circuit voltage of hybrid polymer/TiO2 solar cells - Ishwara, T.; Bradley, D.D.C.; Nelson, J.; Ravirajan, P.; Vanseveren, I.; Cleij, T.; Vanderzande, D.; Lutsen, L.; Tierney, S.; Heeney, M.; McCulloch, I. (University of Jaffna, 2008)