title: Re-evaluating the role of sterics and electronic coupling in determining the open-circuit voltage of organic solar cells.
abstract: The effects of sterics and molecular orientation on the open-circuit voltage and absorbance properties of charge-transfer states are explored in model bilayer organic photovoltaics. It is shown that the open-circuit voltage correlates linearly with the charge-transfer state energy and is not significantly influenced by electronic coupling.
authors.affiliation: Materials Science and Engineering Program, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia, 23955-6900; Department of Materials Science and Engineering, Stanford University, Stanford, California, 94305, USA.
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Graham
authors.forename: Patrick
authors.initials: P
authors.lastname: Erwin
authors.forename: Dennis
authors.initials: D
authors.lastname: Nordlund
authors.forename: Koen
authors.initials: K
authors.lastname: Vandewal
authors.forename: Ruipeng
authors.initials: R
authors.lastname: Li
authors.forename: Guy O
authors.initials: GO
authors.lastname: Ngongang Ndjawa
authors.forename: Eric T
authors.initials: ET
authors.lastname: Hoke
authors.forename: Alberto
authors.initials: A
authors.lastname: Salleo
authors.forename: Mark E
authors.initials: ME
authors.lastname: Thompson
authors.forename: Michael D
authors.initials: MD
authors.lastname: McGehee
authors.forename: Aram
authors.initials: A
authors.lastname: Amassian
mesh_terms: D011211:Electric Power Supplies; D004583:Electrons; D037741:Fullerenes / Q000737:chemistry; D009279:Naphthacenes / Q000737:chemistry*; D011789:Quantum Theory; D012993:Solar Energy
chemical_list: D037741:Fullerenes; D009279:Naphthacenes; C045049:rubrene; C069837:fullerene C60; C487736:naphthacene
keywords: charge-transfer state; electronic coupling; open-circuit voltage; organic photovoltaic; organic solar cell