Persistent photoelectric phenomena in oxygenated C60 thin films Academic Article uri icon

abstract

  • Abstract We report on a persistent internal photopolarization effect observed in C 60 thin films at room temperature. This differs from the similar “photoelectret” state previously seen in some other materials by an absence of fast photodepolarization. Our oxygenated C 60 thin films also exhibit persistent photoconductivity. Both phenomena are discussed within the framework of a model of photogenerated carrier trapping at deep level centers and an inhibition of their recombination due to strong distortion of the C 60 molecule which is known to occur in the presence of localized charge.

publication date

  • January 1, 1996