Hole-Trapping in Iodine-Doped Pentacene Films at Low Temperatures

  • Yun, W.J. (Research Institute of Physics and Chemistry, Dept. of Physics, Chonbuk National University) ;
  • Cho, J.M. (Research Institute of Physics and Chemistry, Dept. of Physics, Chonbuk National University) ;
  • Lee, J.K. (Research Institute of Physics and Chemistry, Dept. of Physics, Chonbuk National University)
  • Published : 2006.08.22

Abstract

Pentacene films, grown on polyethylene terephthalate (PET) substrates, were doped with Iodine. ESR measurements were made for the films in the temperature range of 100-300 K. Two regimes of doping stages were discernible: a light (intercalation) doping regime and a heavy doping regime. The light doping regime was concluded to be dominated by localized holes that were trapped at low temperatures, which indicated trap states near the valence band edge.

Keywords