  The fabrication of nanocrystal (NC) films, starting from colloidal
dispersion, is a very attractive topic in condensed matter physics community.
NC films can be employed for transistors, light emitting diodes, laser, and
solar cells. For this reason the understanding of the film conductivity is of
major importance. In this paper we describe a probabilistic model that allow to
predict the conductivity of the NC films, in this case of a cubic lattice of
Lead Selenide NCs. The model is based on the hopping probability between NCs
show a comparison with experimental data reported in literature.
