Annealing temperature effect on the structural, optical and electrical properties of ZnS thin films

► ZnS film was deposited on glass substrates by chemical bath deposition. ► Effect of annealing on the physical properties of the ZnS film was investigated. ► After being annealed at 500 °C, amorphous film changes to slightly polycrystalline. ► Raman peaks arise due to [TOl+LA]Σ, 2TOΓ, 2LO, 3LO phonon modes of ZnS. ► A nonlinear I-V curve owing to the Schottky contact is also found.