title: Enhanced open-circuit voltage in subphthalocyanine/C60 organic photovoltaic cells.
abstract: A double-heterostructure boron subphthalocyanine chloride (SubPc)/C60 thin-film photovoltaic cell exhibits a more than doubled Voc compared to a conventional copper phthalocyanine (CuPc)/C60 cell under 1 sun AM1.5G simulated illumination. The lower oxidation potential of SubPc results in an increase in the energy difference between the lowest unoccupied molecular orbital of the acceptor-like material and the highest occupied molecular orbital of the donor-like material (referred to as the interface gap, Ig) by 400 meV. We attribute the significant increase in Voc to this increase in Ig.
authors.affiliation: Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA.
authors.forename: Kristin L
authors.initials: KL
authors.lastname: Mutolo
authors.forename: Elizabeth I
authors.initials: EI
authors.lastname: Mayo
authors.forename: Barry P
authors.initials: BP
authors.lastname: Rand
authors.forename: Stephen R
authors.initials: SR
authors.lastname: Forrest
authors.forename: Mark E
authors.initials: ME
authors.lastname: Thompson