title: High-Voltage Dye-Sensitized Solar Cells Mediated by [Co(2,2'-bipyrimidine)3]z.
abstract: The cobalt complex [Co(2,2'-bipyrimidine)3](PF6)2(Co-bpm) was tested as a redox mediator in the dye-sensitized solar cell. The measured photovoltages for the cells were in excess of 1 V, which is approximately 3-fold greater than that measured for devices where [Co(2,2'-bipyridine)3](PF6)2(Co-bpy) was used as the redox mediator under the same experimental conditions. The root cause of this voltage enhancement is the CoIII/CoIIredox potential for Co-bpm being positively shifted by 0.50 V relative to the Co-bpy mediator. This result highlights how the number and position of the N atoms in aromatic ligands can have a profound effect on the measured photovoltage.
authors.affiliation: Department of Chemistry, University of British Columbia , 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.
authors.forename: Kitty Y
authors.initials: KY
authors.lastname: Chen
authors.affiliation: Department of Chemistry, University of British Columbia , 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.
authors.forename: Chuan
authors.initials: C
authors.lastname: Du
authors.affiliation: Department of Chemistry, University of British Columbia , 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.
authors.forename: Brian O
authors.initials: BO
authors.lastname: Patrick
authors.affiliation: Department of Chemistry, University of British Columbia , 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.|Department of Chemical and Biological Engineering, University of British Columbia , 2360 East Mall, Vancouver, British Columbia V6T 1Z1, Canada.
authors.forename: Curtis P
authors.identifier: http://orcid.org/0000-0001-6875-849X
authors.initials: CP
authors.lastname: Berlinguette