We investigated the properties of zinc sulphide thinfilms deposited using a field assisted electrostatic spray
pyrolysis deposition apparatus at an optimized substrate temperature, time, pressure and flowrate of 300oC, 10minutes, 1atm
and 0.5ml/min respectively. The ZnS thin films were there-after annealed at 350oC for 3hours. The influence of process
parameters on the properties of the ZnS thinfilms were investigated using x-ray diffractometry, uv-spectrophotometry and
profilometry. The morphology of the films and the nano-mechanical properties of the optimized thinfilms were also
investigated using nano-indentation technique. The optimized films obtained were transparent, homogeneous, uniformly
dispersed with an average surface thickness of 500nm and roughness of 206.65nm. It had a polycrystalline hexagonal
structure and a relative optical transmittance in the visible spectrum of more than 60%. The morphology of the film revealed
a highly oriented nanostructure composed of uniformly and evenly distributed pore materials. The pores; inevitably
influencing the optical properties of the films. The films would find applications in dielectric filters, electroluminescent and
solar cells devices.