title: Current-voltage characteristics of organic photovoltaic cells following deposition of cathode electrode.
abstract: The current-voltage characteristics of benzoporphine-fullerene solar cells were measured subsequent to the deposition of Al as a cathode material. Even in vacuum, a shift in the open circuit voltage was observed at 20 min after Al deposition. Moreover, the displacement of inert gases (N(2)or Ar) in the evaporation chamber enhanced the photovoltaic parameters. The power conversion efficiency was increased by 24% over the initial characteristics (from 1.04% to 1.29%), which indicates that the structure of the organic-metal interface changed rapidly after Al deposition, even if the process was performed in an air-free glovebox.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Saeki
authors.forename: Kazuto
authors.initials: K
authors.lastname: Hirohara
authors.forename: Yasuko
authors.initials: Y
authors.lastname: Koshiba
authors.forename: Satoshi
authors.initials: S
authors.lastname: Horie
authors.forename: Masahiro
authors.initials: M
authors.lastname: Misaki
authors.forename: Kimiya
authors.initials: K
authors.lastname: Takeshita
authors.forename: Kenji
authors.initials: K
authors.lastname: Ishida
authors.forename: Yasukiyo
authors.initials: Y
authors.lastname: Ueda