Transport properties of ZnS in an electric field have been calculated in
the lattice temperature range between 77K-500K, by using a Monte Carlo
technique. It has been found that the threshold to occur a negative differential
resistance changes over this temperature range. The threshold field increased
from 1.5 × 105 V/cm at 77 K to 2.4 × 105 V/cm at 500 K. The influence of
impurity scattering event on ZnS has been neglected.