Electrical studies of C60 thin films of high crystallinity are present
ed. The influence of sample annealing on crystallinity is emphasized.
The dependence of the film resistivity on oxygen intercalation and the
reversibility of the transport properties upon thermal treatement in
vacuum and on air are reported. A comparison with a single crystal con
duction is dons and a simple model of oxygen-involved electronic trans
port in C60 thin films is proposed.